mirror of
https://github.com/silverstripe/silverstripe-framework
synced 2024-06-29 07:59:31 +02:00
e8e4604457
DataList had several methods that should act on a copy and return that copy, but was instead mutating the existing list. We cant change this behaviour in the 3.0 line for backwards compt. reasons, but this makes the desired behavior the default, and makes disabling the mutation in 3.1 easier It also introduces two new methods to deal with the common pattern of wanting to modify the underlying dataQuery, which we want to be able to reliably do in a way that always acts immutably. The main method of these two is alterDataQuery
1070 lines
29 KiB
PHP
1070 lines
29 KiB
PHP
<?php
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/**
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* Implements a "lazy loading" DataObjectSet.
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* Uses {@link DataQuery} to do the actual query generation.
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*
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* todo 3.1: In 3.0 the below is not currently true for backwards compatible reasons, but code should not rely on current behaviour
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*
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* DataLists have two sets of methods.
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*
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* 1). Selection methods (SS_Filterable, SS_Sortable, SS_Limitable) change the way the list is built, but does not
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* alter underlying data. There are no external affects from selection methods once this list instance is destructed.
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*
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* 2). Mutation methods change the underlying data. The change persists into the underlying data storage layer.
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*
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* DataLists are _immutable_ as far as selection methods go - they all return new instances of DataList, rather
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* than change the current list.
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*
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* DataLists are _mutable_ as far as mutation methods go - they all act on the existing DataList instance.
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*
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* @package framework
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* @subpackage model
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*/
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class DataList extends ViewableData implements SS_List, SS_Filterable, SS_Sortable, SS_Limitable {
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/**
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* The DataObject class name that this data list is querying
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*
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* @var string
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*/
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protected $dataClass;
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/**
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* The {@link DataQuery} object responsible for getting this DataList's records
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*
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* @var DataQuery
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*/
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protected $dataQuery;
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/**
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* The DataModel from which this DataList comes.
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*
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* @var DataModel
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*/
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protected $model;
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/**
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* Create a new DataList.
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* No querying is done on construction, but the initial query schema is set up.
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*
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* @param string $dataClass - The DataObject class to query.
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*/
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public function __construct($dataClass) {
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$this->dataClass = $dataClass;
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$this->dataQuery = new DataQuery($this->dataClass);
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parent::__construct();
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}
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/**
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* Set the DataModel
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*
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* @param DataModel $model
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*/
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public function setDataModel(DataModel $model) {
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$this->model = $model;
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}
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/**
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* Get the dataClass name for this DataList, ie the DataObject ClassName
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*
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* @return string
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*/
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public function dataClass() {
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return $this->dataClass;
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}
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/**
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* When cloning this object, clone the dataQuery object as well
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*/
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public function __clone() {
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$this->dataQuery = clone $this->dataQuery;
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}
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/**
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* Return a copy of the internal {@link DataQuery} object
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*
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* todo 3.1: In 3.0 the below is not currently true for backwards compatible reasons, but code should not rely on this
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* Because the returned value is a copy, modifying it won't affect this list's contents. If
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* you want to alter the data query directly, use the alterDataQuery method
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*
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* @return DataQuery
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*/
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public function dataQuery() {
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// TODO 3.1: This method potentially mutates self
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return /* clone */ $this->dataQuery;
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}
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/**
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* @var bool - Indicates if we are in an alterDataQueryCall already, so alterDataQuery can be re-entrant
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*/
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protected $inAlterDataQueryCall = false;
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/**
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* Return a new DataList instance with the underlying {@link DataQuery} object altered
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*
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* If you want to alter the underlying dataQuery for this list, this wrapper method
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* will ensure that you can do so without mutating the existing List object.
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*
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* It clones this list, calls the passed callback function with the dataQuery of the new
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* list as it's first parameter (and the list as it's second), then returns the list
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*
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* Note that this function is re-entrant - it's safe to call this inside a callback passed to
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* alterDataQuery
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*
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* @param $callback
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* @return DataList
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*/
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public function alterDataQuery($callback) {
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if ($this->inAlterDataQueryCall) {
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$list = $this;
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$res = $callback($list->dataQuery, $list);
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if ($res) $list->dataQuery = $res;
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return $list;
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}
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else {
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$list = clone $this;
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$list->inAlterDataQueryCall = true;
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try {
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$res = $callback($list->dataQuery, $list);
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if ($res) $list->dataQuery = $res;
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}
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catch (Exception $e) {
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$list->inAlterDataQueryCall = false;
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throw $e;
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}
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$list->inAlterDataQueryCall = false;
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return $list;
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}
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}
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/**
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* In 3.0.0 some methods in DataList mutate their list. We don't want to change that in the 3.0.x
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* line, but we don't want people relying on it either. This does the same as alterDataQuery, but
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* _does_ mutate the existing list.
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*
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* todo 3.1: All methods that call this need to call alterDataQuery instead
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*/
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protected function alterDataQuery_30($callback) {
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Deprecation::notice('3.1', 'DataList will become immutable in 3.1');
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if ($this->inAlterDataQueryCall) {
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$res = $callback($this->dataQuery, $this);
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if ($res) $this->dataQuery = $res;
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return $this;
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}
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else {
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$this->inAlterDataQueryCall = true;
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try {
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$res = $callback($this->dataQuery, $this);
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if ($res) $this->dataQuery = $res;
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}
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catch (Exception $e) {
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$this->inAlterDataQueryCall = false;
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throw $e;
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}
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$this->inAlterDataQueryCall = false;
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return $this;
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}
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}
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/**
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* Return a new DataList instance with the underlying {@link DataQuery} object changed
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*
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* @param DataQuery $dataQuery
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* @return DataList
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*/
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public function setDataQuery(DataQuery $dataQuery) {
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$clone = clone $this;
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$clone->dataQuery = $dataQuery;
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return $clone;
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}
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/**
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* Returns the SQL query that will be used to get this DataList's records. Good for debugging. :-)
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*
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* @return SQLQuery
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*/
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public function sql() {
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return $this->dataQuery->query()->sql();
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}
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/**
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* Return a new DataList instance with a WHERE clause added to this list's query.
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*
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* @param string $filter Escaped SQL statement
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* @return DataList
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*/
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public function where($filter) {
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return $this->alterDataQuery_30(function($query) use ($filter){
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$query->where($filter);
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});
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}
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/**
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* Returns true if this DataList can be sorted by the given field.
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*
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* @param string $fieldName
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* @return boolean
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*/
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public function canSortBy($fieldName) {
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return $this->dataQuery()->query()->canSortBy($fieldName);
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}
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/**
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*
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* @param string $fieldName
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* @return boolean
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*/
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public function canFilterBy($fieldName) {
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if($t = singleton($this->dataClass)->hasDatabaseField($fieldName)){
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return true;
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}
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return false;
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}
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/**
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* Return a new DataList instance with a join clause added to this list's query.
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*
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* @param type $join Escaped SQL statement
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* @return DataList
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* @deprecated 3.0
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*/
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public function join($join) {
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Deprecation::notice('3.0', 'Use innerJoin() or leftJoin() instead.');
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return $this->alterDataQuery_30(function($query) use ($join){
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$query->join($join);
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});
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}
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/**
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* Return a new DataList instance with the records returned in this query restricted by a limit clause
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*
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* @param int $limit
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* @param int $offset
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*/
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public function limit($limit, $offset = 0) {
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if(!$limit && !$offset) {
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return $this;
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}
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if($limit && !is_numeric($limit)) {
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Deprecation::notice('3.0', 'Please pass limits as 2 arguments, rather than an array or SQL fragment.', Deprecation::SCOPE_GLOBAL);
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}
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return $this->alterDataQuery_30(function($query) use ($limit, $offset){
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$query->limit($limit, $offset);
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});
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}
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/**
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* Return a new DataList instance as a copy of this data list with the sort order set
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*
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* @see SS_List::sort()
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* @see SQLQuery::orderby
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* @example $list = $list->sort('Name'); // default ASC sorting
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* @example $list = $list->sort('Name DESC'); // DESC sorting
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* @example $list = $list->sort('Name', 'ASC');
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* @example $list = $list->sort(array('Name'=>'ASC,'Age'=>'DESC'));
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*
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* @param String|array Escaped SQL statement. If passed as array, all keys and values are assumed to be escaped.
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* @return DataList
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*/
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public function sort() {
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$count = func_num_args();
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if($count == 0) {
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return $this;
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}
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if($count > 2) {
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throw new InvalidArgumentException('This method takes zero, one or two arguments');
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}
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$sort = $col = $dir = null;
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if ($count == 2) {
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list($col, $dir) = func_get_args();
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}
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else {
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$sort = func_get_arg(0);
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}
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return $this->alterDataQuery_30(function($query, $list) use ($sort, $col, $dir){
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if ($col) {
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// sort('Name','Desc')
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if(!in_array(strtolower($dir),array('desc','asc'))){
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user_error('Second argument to sort must be either ASC or DESC');
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}
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$query->sort($col, $dir);
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}
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else if(is_string($sort) && $sort){
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// sort('Name ASC')
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if(stristr($sort, ' asc') || stristr($sort, ' desc')) {
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$query->sort($sort);
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} else {
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$query->sort($sort, 'ASC');
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}
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}
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else if(is_array($sort)) {
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// sort(array('Name'=>'desc'));
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$query->sort(null, null); // wipe the sort
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foreach($sort as $col => $dir) {
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// Convert column expressions to SQL fragment, while still allowing the passing of raw SQL fragments.
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try {
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$relCol = $list->getRelationName($col);
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} catch(InvalidArgumentException $e) {
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$relCol = $col;
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}
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$query->sort($relCol, $dir, false);
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}
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}
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});
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}
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/**
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* Return a copy of this list which only includes items with these charactaristics
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*
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* @see SS_List::filter()
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*
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* @example $list = $list->filter('Name', 'bob'); // only bob in the list
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* @example $list = $list->filter('Name', array('aziz', 'bob'); // aziz and bob in list
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* @example $list = $list->filter(array('Name'=>'bob, 'Age'=>21)); // bob with the age 21
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* @example $list = $list->filter(array('Name'=>'bob, 'Age'=>array(21, 43))); // bob with the Age 21 or 43
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* @example $list = $list->filter(array('Name'=>array('aziz','bob'), 'Age'=>array(21, 43))); // aziz with the age 21 or 43 and bob with the Age 21 or 43
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*
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* @todo extract the sql from $customQuery into a SQLGenerator class
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*
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* @param string|array Escaped SQL statement. If passed as array, all keys and values are assumed to be escaped.
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* @return DataList
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*/
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public function filter() {
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// Validate and process arguments
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$arguments = func_get_args();
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switch(sizeof($arguments)) {
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case 1: $filters = $arguments[0]; break;
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case 2: $filters = array($arguments[0] => $arguments[1]); break;
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default:
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throw new InvalidArgumentException('Incorrect number of arguments passed to filter()');
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}
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// TODO 3.1: Once addFilter doesn't mutate self, this results in a double clone
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$clone = clone $this;
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$clone->addFilter($filters);
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return $clone;
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}
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/**
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* Return a new instance of the list with an added filter
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*/
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public function addFilter($filterArray) {
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$SQL_Statements = array();
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foreach($filterArray as $field => $value) {
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if(is_array($value)) {
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$customQuery = 'IN (\''.implode('\',\'',Convert::raw2sql($value)).'\')';
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} else {
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$customQuery = '= \''.Convert::raw2sql($value).'\'';
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}
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if(stristr($field,':')) {
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$fieldArgs = explode(':',$field);
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$field = array_shift($fieldArgs);
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foreach($fieldArgs as $fieldArg){
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$comparisor = $this->applyFilterContext($field, $fieldArg, $value);
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}
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} else {
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if($field == 'ID') {
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$field = sprintf('"%s"."ID"', ClassInfo::baseDataClass($this->dataClass));
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} else {
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$field = '"' . Convert::raw2sql($field) . '"';
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}
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$SQL_Statements[] = $field . ' ' . $customQuery;
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}
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}
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if(!count($SQL_Statements)) return $this;
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return $this->alterDataQuery_30(function($query) use ($SQL_Statements){
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foreach($SQL_Statements as $SQL_Statement){
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$query->where($SQL_Statement);
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}
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});
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}
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/**
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* Filter this DataList by a callback function.
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* The function will be passed each record of the DataList in turn, and must return true for the record to be included.
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* Returns the filtered list.
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*
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* Note that, in the current implementation, the filtered list will be an ArrayList, but this may change in a future
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* implementation.
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*/
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public function filterByCallback($callback) {
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if(!is_callable($callback)) throw new LogicException("DataList::filterByCallback() must be passed something callable.");
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$output = new ArrayList;
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foreach($this as $item) {
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if($callback($item)) $output->push($item);
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}
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return $output;
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}
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/**
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* Translates a Object relation name to a Database name and apply the relation join to
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* the query. Throws an InvalidArgumentException if the $field doesn't correspond to a relation
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*
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* @param string $field
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* @return string
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*/
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public function getRelationName($field) {
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if(!preg_match('/^[A-Z0-9._]+$/i', $field)) {
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throw new InvalidArgumentException("Bad field expression $field");
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}
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if (!$this->inAlterDataQueryCall) {
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Deprecation::notice('3.1', 'getRelationName is mutating, and must be called inside an alterDataQuery block');
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}
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if(strpos($field,'.') === false) {
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return '"'.$field.'"';
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}
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$relations = explode('.', $field);
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$fieldName = array_pop($relations);
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$relationModelName = $this->dataQuery->applyRelation($field);
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return '"'.$relationModelName.'"."'.$fieldName.'"';
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}
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/**
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* Translates the comparisator to the sql query
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*
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* @param string $field - the fieldname in the db
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* @param string $comparisators - example StartsWith, relates to a filtercontext
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* @param string $value - the value that the filtercontext will use for matching
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* @todo Deprecated SearchContexts and pull their functionality into the core of the ORM
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*/
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private function applyFilterContext($field, $comparisators, $value) {
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$t = singleton($this->dataClass())->dbObject($field);
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$className = "{$comparisators}Filter";
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if(!class_exists($className)){
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throw new InvalidArgumentException('There are no '.$comparisators.' comparisator');
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}
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$t = new $className($field,$value);
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$t->apply($this->dataQuery());
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}
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/**
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* Return a copy of this list which does not contain any items with these charactaristics
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*
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* @see SS_List::exclude()
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* @example $list = $list->exclude('Name', 'bob'); // exclude bob from list
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* @example $list = $list->exclude('Name', array('aziz', 'bob'); // exclude aziz and bob from list
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* @example $list = $list->exclude(array('Name'=>'bob, 'Age'=>21)); // exclude bob that has Age 21
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* @example $list = $list->exclude(array('Name'=>'bob, 'Age'=>array(21, 43))); // exclude bob with Age 21 or 43
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* @example $list = $list->exclude(array('Name'=>array('bob','phil'), 'Age'=>array(21, 43))); // bob age 21 or 43, phil age 21 or 43 would be excluded
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*
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* @todo extract the sql from this method into a SQLGenerator class
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*
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* @param string|array Escaped SQL statement. If passed as array, all keys and values are assumed to be escaped.
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* @return DataList
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*/
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public function exclude() {
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$numberFuncArgs = count(func_get_args());
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$whereArguments = array();
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if($numberFuncArgs == 1 && is_array(func_get_arg(0))) {
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$whereArguments = func_get_arg(0);
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} elseif($numberFuncArgs == 2) {
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$whereArguments[func_get_arg(0)] = func_get_arg(1);
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} else {
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throw new InvalidArgumentException('Incorrect number of arguments passed to exclude()');
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}
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$SQL_Statements = array();
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foreach($whereArguments as $fieldName => $value) {
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if($fieldName == 'ID') {
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$fieldName = sprintf('"%s"."ID"', ClassInfo::baseDataClass($this->dataClass));
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} else {
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$fieldName = '"' . Convert::raw2sql($fieldName) . '"';
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}
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if(is_array($value)){
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$SQL_Statements[] = ($fieldName . ' NOT IN (\''.implode('\',\'', Convert::raw2sql($value)).'\')');
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} else {
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$SQL_Statements[] = ($fieldName . ' != \''.Convert::raw2sql($value).'\'');
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}
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}
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if(!count($SQL_Statements)) return $this;
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return $this->alterDataQuery_30(function($query) use ($SQL_Statements){
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$query->whereAny($SQL_Statements);
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});
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}
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|
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/**
|
|
* This method returns a copy of this list that does not contain any DataObjects that exists in $list
|
|
*
|
|
* The $list passed needs to contain the same dataclass as $this
|
|
*
|
|
* @param SS_List $list
|
|
* @return DataList
|
|
* @throws BadMethodCallException
|
|
*/
|
|
public function subtract(SS_List $list) {
|
|
if($this->dataclass() != $list->dataclass()) {
|
|
throw new InvalidArgumentException('The list passed must have the same dataclass as this class');
|
|
}
|
|
|
|
return $this->alterDataQuery(function($query) use ($list){
|
|
$query->subtract($list->dataQuery());
|
|
});
|
|
}
|
|
|
|
/**
|
|
* Return a new DataList instance with an inner join clause added to this list's query.
|
|
*
|
|
* @param string $table Table name (unquoted)
|
|
* @param string $onClause Escaped SQL statement, e.g. '"Table1"."ID" = "Table2"."ID"'
|
|
* @param string $alias - if you want this table to be aliased under another name
|
|
* @return DataList
|
|
*/
|
|
public function innerJoin($table, $onClause, $alias = null) {
|
|
return $this->alterDataQuery_30(function($query) use ($table, $onClause, $alias){
|
|
$query->innerJoin($table, $onClause, $alias);
|
|
});
|
|
}
|
|
|
|
/**
|
|
* Return a new DataList instance with a left join clause added to this list's query.
|
|
*
|
|
* @param string $table Table name (unquoted)
|
|
* @param string $onClause Escaped SQL statement, e.g. '"Table1"."ID" = "Table2"."ID"'
|
|
* @param string $alias - if you want this table to be aliased under another name
|
|
* @return DataList
|
|
*/
|
|
public function leftJoin($table, $onClause, $alias = null) {
|
|
return $this->alterDataQuery_30(function($query) use ($table, $onClause, $alias){
|
|
$query->leftJoin($table, $onClause, $alias);
|
|
});
|
|
}
|
|
|
|
/**
|
|
* Return an array of the actual items that this DataList contains at this stage.
|
|
* This is when the query is actually executed.
|
|
*
|
|
* @return array
|
|
*/
|
|
public function toArray() {
|
|
$query = $this->dataQuery->query();
|
|
$rows = $query->execute();
|
|
$results = array();
|
|
|
|
foreach($rows as $row) {
|
|
$results[] = $this->createDataObject($row);
|
|
}
|
|
|
|
return $results;
|
|
}
|
|
|
|
/**
|
|
* Return this list as an array and every object it as an sub array as well
|
|
*
|
|
* @return type
|
|
*/
|
|
public function toNestedArray() {
|
|
$result = array();
|
|
|
|
foreach($this as $item) {
|
|
$result[] = $item->toMap();
|
|
}
|
|
|
|
return $result;
|
|
}
|
|
|
|
public function debug() {
|
|
$val = "<h2>" . $this->class . "</h2><ul>";
|
|
|
|
foreach($this->toNestedArray() as $item) {
|
|
$val .= "<li style=\"list-style-type: disc; margin-left: 20px\">" . Debug::text($item) . "</li>";
|
|
}
|
|
$val .= "</ul>";
|
|
return $val;
|
|
}
|
|
|
|
/**
|
|
* Returns a map of this list
|
|
*
|
|
* @param string $keyField - the 'key' field of the result array
|
|
* @param string $titleField - the value field of the result array
|
|
* @return SS_Map
|
|
*/
|
|
public function map($keyField = 'ID', $titleField = 'Title') {
|
|
return new SS_Map($this, $keyField, $titleField);
|
|
}
|
|
|
|
/**
|
|
* Create a DataObject from the given SQL row
|
|
*
|
|
* @param array $row
|
|
* @return DataObject
|
|
*/
|
|
protected function createDataObject($row) {
|
|
$defaultClass = $this->dataClass;
|
|
|
|
// Failover from RecordClassName to ClassName
|
|
if(empty($row['RecordClassName'])) {
|
|
$row['RecordClassName'] = $row['ClassName'];
|
|
}
|
|
|
|
// Instantiate the class mentioned in RecordClassName only if it exists, otherwise default to $this->dataClass
|
|
if(class_exists($row['RecordClassName'])) {
|
|
$item = Injector::inst()->create($row['RecordClassName'], $row, false, $this->model);
|
|
} else {
|
|
$item = Injector::inst()->create($defaultClass, $row, false, $this->model);
|
|
}
|
|
|
|
return $item;
|
|
}
|
|
|
|
/**
|
|
* Returns an Iterator for this DataList.
|
|
* This function allows you to use DataLists in foreach loops
|
|
*
|
|
* @return ArrayIterator
|
|
*/
|
|
public function getIterator() {
|
|
return new ArrayIterator($this->toArray());
|
|
}
|
|
|
|
/**
|
|
* Return the number of items in this DataList
|
|
*
|
|
* @return int
|
|
*/
|
|
public function count() {
|
|
return $this->dataQuery->count();
|
|
}
|
|
|
|
/**
|
|
* Return the maximum value of the given field in this DataList
|
|
*
|
|
* @param string $fieldName
|
|
* @return mixed
|
|
*/
|
|
public function max($fieldName) {
|
|
return $this->dataQuery->max($fieldName);
|
|
}
|
|
|
|
/**
|
|
* Return the minimum value of the given field in this DataList
|
|
*
|
|
* @param string $fieldName
|
|
* @return mixed
|
|
*/
|
|
public function min($fieldName) {
|
|
return $this->dataQuery->min($fieldName);
|
|
}
|
|
|
|
/**
|
|
* Return the average value of the given field in this DataList
|
|
*
|
|
* @param string $fieldName
|
|
* @return mixed
|
|
*/
|
|
public function avg($fieldName) {
|
|
return $this->dataQuery->avg($fieldName);
|
|
}
|
|
|
|
/**
|
|
* Return the sum of the values of the given field in this DataList
|
|
*
|
|
* @param string $fieldName
|
|
* @return mixed
|
|
*/
|
|
public function sum($fieldName) {
|
|
return $this->dataQuery->sum($fieldName);
|
|
}
|
|
|
|
|
|
/**
|
|
* Returns the first item in this DataList
|
|
*
|
|
* @return DataObject
|
|
*/
|
|
public function first() {
|
|
foreach($this->dataQuery->firstRow()->execute() as $row) {
|
|
return $this->createDataObject($row);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Returns the last item in this DataList
|
|
*
|
|
* @return DataObject
|
|
*/
|
|
public function last() {
|
|
foreach($this->dataQuery->lastRow()->execute() as $row) {
|
|
return $this->createDataObject($row);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Returns true if this DataList has items
|
|
*
|
|
* @return bool
|
|
*/
|
|
public function exists() {
|
|
return $this->count() > 0;
|
|
}
|
|
|
|
/**
|
|
* Get a sub-range of this dataobjectset as an array
|
|
*
|
|
* @param int $offset
|
|
* @param int $length
|
|
* @return DataList
|
|
*/
|
|
public function getRange($offset, $length) {
|
|
Deprecation::notice("3.0", 'Use limit($length, $offset) instead. Note the new argument order.');
|
|
return $this->limit($length, $offset);
|
|
}
|
|
|
|
/**
|
|
* Find the first DataObject of this DataList where the given key = value
|
|
*
|
|
* @param string $key
|
|
* @param string $value
|
|
* @return DataObject|null
|
|
*/
|
|
public function find($key, $value) {
|
|
if($key == 'ID') {
|
|
$baseClass = ClassInfo::baseDataClass($this->dataClass);
|
|
$SQL_col = sprintf('"%s"."%s"', $baseClass, Convert::raw2sql($key));
|
|
} else {
|
|
$SQL_col = sprintf('"%s"', Convert::raw2sql($key));
|
|
}
|
|
|
|
// todo 3.1: In 3.1 where won't be mutating, so this can be on $this directly
|
|
$clone = clone $this;
|
|
return $clone->where("$SQL_col = '" . Convert::raw2sql($value) . "'")->First();
|
|
}
|
|
|
|
/**
|
|
* Restrict the columns to fetch into this DataList
|
|
*
|
|
* @param array $queriedColumns
|
|
* @return DataList
|
|
*/
|
|
public function setQueriedColumns($queriedColumns) {
|
|
return $this->alterDataQuery(function($query) use ($queriedColumns){
|
|
$query->setQueriedColumns($queriedColumns);
|
|
});
|
|
}
|
|
|
|
/**
|
|
* Filter this list to only contain the given Primary IDs
|
|
*
|
|
* @param array $ids Array of integers, will be automatically cast/escaped.
|
|
* @return DataList
|
|
*/
|
|
public function byIDs(array $ids) {
|
|
$ids = array_map('intval', $ids); // sanitize
|
|
$baseClass = ClassInfo::baseDataClass($this->dataClass);
|
|
$this->where("\"$baseClass\".\"ID\" IN (" . implode(',', $ids) .")");
|
|
|
|
return $this;
|
|
}
|
|
|
|
/**
|
|
* Return the first DataObject with the given ID
|
|
*
|
|
* @param int $id
|
|
* @return DataObject
|
|
*/
|
|
public function byID($id) {
|
|
$baseClass = ClassInfo::baseDataClass($this->dataClass);
|
|
|
|
// todo 3.1: In 3.1 where won't be mutating, so this can be on $this directly
|
|
$clone = clone $this;
|
|
return $clone->where("\"$baseClass\".\"ID\" = " . (int)$id)->First();
|
|
}
|
|
|
|
/**
|
|
* Returns an array of a single field value for all items in the list.
|
|
*
|
|
* @param string $colName
|
|
* @return array
|
|
*/
|
|
public function column($colName = "ID") {
|
|
return $this->dataQuery->column($colName);
|
|
}
|
|
|
|
// Member altering methods
|
|
|
|
/**
|
|
* Sets the ComponentSet to be the given ID list.
|
|
* Records will be added and deleted as appropriate.
|
|
*
|
|
* @param array $idList List of IDs.
|
|
*/
|
|
public function setByIDList($idList) {
|
|
$has = array();
|
|
|
|
// Index current data
|
|
foreach($this->column() as $id) {
|
|
$has[$id] = true;
|
|
}
|
|
|
|
// Keep track of items to delete
|
|
$itemsToDelete = $has;
|
|
|
|
// add items in the list
|
|
// $id is the database ID of the record
|
|
if($idList) foreach($idList as $id) {
|
|
unset($itemsToDelete[$id]);
|
|
if($id && !isset($has[$id])) {
|
|
$this->add($id);
|
|
}
|
|
}
|
|
|
|
// Remove any items that haven't been mentioned
|
|
$this->removeMany(array_keys($itemsToDelete));
|
|
}
|
|
|
|
/**
|
|
* Returns an array with both the keys and values set to the IDs of the records in this list.
|
|
*
|
|
*/
|
|
public function getIDList() {
|
|
$ids = $this->column("ID");
|
|
return $ids ? array_combine($ids, $ids) : array();
|
|
}
|
|
|
|
/**
|
|
* Returns a HasManyList or ManyMany list representing the querying of a relation across all
|
|
* objects in this data list. For it to work, the relation must be defined on the data class
|
|
* that you used to create this DataList.
|
|
*
|
|
* Example: Get members from all Groups:
|
|
*
|
|
* DataList::Create("Group")->relation("Members")
|
|
*
|
|
* @param string $relationName
|
|
* @return HasManyList|ManyManyList
|
|
*/
|
|
public function relation($relationName) {
|
|
$ids = $this->column('ID');
|
|
return singleton($this->dataClass)->$relationName()->forForeignID($ids);
|
|
}
|
|
|
|
function dbObject($fieldName) {
|
|
return singleton($this->dataClass)->dbObject($fieldName);
|
|
}
|
|
|
|
/**
|
|
* Add a number of items to the component set.
|
|
*
|
|
* @param array $items Items to add, as either DataObjects or IDs.
|
|
* @return DataList
|
|
*/
|
|
public function addMany($items) {
|
|
foreach($items as $item) {
|
|
$this->add($item);
|
|
}
|
|
return $this;
|
|
}
|
|
|
|
/**
|
|
* Remove the items from this list with the given IDs
|
|
*
|
|
* @param array $idList
|
|
* @return DataList
|
|
*/
|
|
public function removeMany($idList) {
|
|
foreach($idList as $id) {
|
|
$this->removeByID($id);
|
|
}
|
|
return $this;
|
|
}
|
|
|
|
/**
|
|
* Remove every element in this DataList matching the given $filter.
|
|
*
|
|
* @param string $filter - a sql type where filter
|
|
* @return DataList
|
|
*/
|
|
public function removeByFilter($filter) {
|
|
foreach($this->where($filter) as $item) {
|
|
$this->remove($item);
|
|
}
|
|
return $this;
|
|
}
|
|
|
|
/**
|
|
* Remove every element in this DataList.
|
|
*
|
|
* @return DataList
|
|
*/
|
|
public function removeAll() {
|
|
foreach($this as $item) {
|
|
$this->remove($item);
|
|
}
|
|
return $this;
|
|
}
|
|
|
|
/**
|
|
* This method are overloaded by HasManyList and ManyMany list to perform more sophisticated
|
|
* list manipulation
|
|
*
|
|
* @param type $item
|
|
*/
|
|
public function add($item) {
|
|
// Nothing needs to happen by default
|
|
// TO DO: If a filter is given to this data list then
|
|
}
|
|
|
|
/**
|
|
* Return a new item to add to this DataList.
|
|
*
|
|
* @todo This doesn't factor in filters.
|
|
*/
|
|
public function newObject($initialFields = null) {
|
|
$class = $this->dataClass;
|
|
return Injector::inst()->create($class, $initialFields, false, $this->model);
|
|
}
|
|
|
|
/**
|
|
* Remove this item by deleting it
|
|
*
|
|
* @param DataClass $item
|
|
* @todo Allow for amendment of this behaviour - for example, we can remove an item from
|
|
* an "ActiveItems" DataList by chaning the status to inactive.
|
|
*/
|
|
public function remove($item) {
|
|
// By default, we remove an item from a DataList by deleting it.
|
|
if($item instanceof $this->dataClass) $item->delete();
|
|
|
|
}
|
|
|
|
/**
|
|
* Remove an item from this DataList by ID
|
|
*
|
|
* @param int $itemID - The primary ID
|
|
*/
|
|
public function removeByID($itemID) {
|
|
$item = $this->byID($itemID);
|
|
if($item) return $item->delete();
|
|
}
|
|
|
|
/**
|
|
* Reverses a list of items.
|
|
*
|
|
* @return DataList
|
|
*/
|
|
public function reverse() {
|
|
return $this->alterDataQuery_30(function($query){
|
|
$query->reverseSort();
|
|
});
|
|
}
|
|
|
|
/**
|
|
* This method won't function on DataLists due to the specific query that it represent
|
|
*
|
|
* @param mixed $item
|
|
*/
|
|
public function push($item) {
|
|
user_error("Can't call DataList::push() because its data comes from a specific query.", E_USER_ERROR);
|
|
}
|
|
|
|
/**
|
|
* This method won't function on DataLists due to the specific query that it represent
|
|
*
|
|
* @param mixed $item
|
|
*/
|
|
public function insertFirst($item) {
|
|
user_error("Can't call DataList::insertFirst() because its data comes from a specific query.", E_USER_ERROR);
|
|
}
|
|
|
|
/**
|
|
* This method won't function on DataLists due to the specific query that it represent
|
|
*
|
|
*/
|
|
public function shift() {
|
|
user_error("Can't call DataList::shift() because its data comes from a specific query.", E_USER_ERROR);
|
|
}
|
|
|
|
/**
|
|
* This method won't function on DataLists due to the specific query that it represent
|
|
*
|
|
*/
|
|
public function replace() {
|
|
user_error("Can't call DataList::replace() because its data comes from a specific query.", E_USER_ERROR);
|
|
}
|
|
|
|
/**
|
|
* This method won't function on DataLists due to the specific query that it represent
|
|
*
|
|
*/
|
|
public function merge() {
|
|
user_error("Can't call DataList::merge() because its data comes from a specific query.", E_USER_ERROR);
|
|
}
|
|
|
|
/**
|
|
* This method won't function on DataLists due to the specific query that it represent
|
|
*
|
|
*/
|
|
public function removeDuplicates() {
|
|
user_error("Can't call DataList::removeDuplicates() because its data comes from a specific query.", E_USER_ERROR);
|
|
}
|
|
|
|
/**
|
|
* Returns whether an item with $key exists
|
|
*
|
|
* @param mixed $key
|
|
* @return bool
|
|
*/
|
|
public function offsetExists($key) {
|
|
return ($this->limit(1,$key)->First() != null);
|
|
}
|
|
|
|
/**
|
|
* Returns item stored in list with index $key
|
|
*
|
|
* @param mixed $key
|
|
* @return DataObject
|
|
*/
|
|
public function offsetGet($key) {
|
|
return $this->limit(1, $key)->First();
|
|
}
|
|
|
|
/**
|
|
* Set an item with the key in $key
|
|
*
|
|
* @param mixed $key
|
|
* @param mixed $value
|
|
*/
|
|
public function offsetSet($key, $value) {
|
|
user_error("Can't alter items in a DataList using array-access", E_USER_ERROR);
|
|
}
|
|
|
|
/**
|
|
* Unset an item with the key in $key
|
|
*
|
|
* @param mixed $key
|
|
*/
|
|
public function offsetUnset($key) {
|
|
user_error("Can't alter items in a DataList using array-access", E_USER_ERROR);
|
|
}
|
|
|
|
}
|