mirror of
https://github.com/silverstripe/silverstripe-framework
synced 2024-08-26 12:36:07 +02:00
302 lines
7.3 KiB
PHP
302 lines
7.3 KiB
PHP
<?php
|
|
/**
|
|
* Single field in the database.
|
|
* Every field from the database is represented as a sub-class of DBField.
|
|
*
|
|
* <b>Multi-value DBField objects</b>
|
|
*
|
|
* Sometimes you will want to make DBField classes that don't have a 1-1 match to database fields. To do this, there are a
|
|
* number of fields for you to overload.
|
|
* - Overload {@link writeToManipulation} to add the appropriate references to the INSERT or UPDATE command
|
|
* - Overload {@link addToQuery} to add the appropriate items to a SELECT query's field list
|
|
* - Add appropriate accessor methods
|
|
*
|
|
* <b>Subclass Example</b>
|
|
*
|
|
* The class is easy to overload with custom types, e.g. the MySQL "BLOB" type (http://dev.mysql.com/doc/refman/5.0/en/blob.html).
|
|
*
|
|
* <code>
|
|
* class Blob extends DBField {
|
|
* function requireField() {
|
|
* DB::requireField($this->tableName, $this->name, "blob");
|
|
* }
|
|
* }
|
|
* </code>
|
|
*
|
|
* @package sapphire
|
|
* @subpackage model
|
|
*/
|
|
abstract class DBField extends ViewableData {
|
|
|
|
protected $value;
|
|
|
|
protected $tableName;
|
|
|
|
protected $name;
|
|
|
|
protected $arrayValue;
|
|
|
|
/**
|
|
* The escape type for this field when inserted into a template - either "xml" or "raw".
|
|
*
|
|
* @var string
|
|
*/
|
|
public static $escape_type = 'raw';
|
|
|
|
/**
|
|
* Subclass of {@link SearchFilter} for usage in {@link defaultSearchFilter()}.
|
|
*
|
|
* @var string
|
|
*/
|
|
public static $default_search_filter_class = 'PartialMatchFilter';
|
|
|
|
/**
|
|
* @var $default mixed Default-value in the database.
|
|
* Might be overridden on DataObject-level, but still useful for setting defaults on
|
|
* already existing records after a db-build.
|
|
*/
|
|
protected $defaultVal;
|
|
|
|
function __construct($name = null) {
|
|
$this->name = $name;
|
|
|
|
parent::__construct();
|
|
}
|
|
|
|
/**
|
|
* Create a DBField object that's not bound to any particular field.
|
|
* Useful for accessing the classes behaviour for other parts of your code.
|
|
*/
|
|
static function create($className, $value, $name = null, $object = null) {
|
|
$dbField = Object::create($className, $name, $object);
|
|
$dbField->setValue($value, null, false);
|
|
return $dbField;
|
|
}
|
|
|
|
/**
|
|
* Set the name of this field.
|
|
* The name should never be altered, but it if was never given a name in the first place you can set a name.
|
|
* If you try an alter the name a warning will be thrown.
|
|
*/
|
|
function setName($name) {
|
|
if($this->name) {
|
|
user_error("DBField::setName() shouldn't be called once a DBField already has a name. It's partially immutable - it shouldn't be altered after it's given a value.", E_USER_WARNING);
|
|
}
|
|
$this->name = $name;
|
|
}
|
|
|
|
/**
|
|
* Returns the name of this field.
|
|
* @return string
|
|
*/
|
|
function getName() {
|
|
return $this->name;
|
|
}
|
|
|
|
/**
|
|
* Returns the value of this field.
|
|
* @return mixed
|
|
*/
|
|
function getValue() {
|
|
return $this->value;
|
|
}
|
|
|
|
/**
|
|
* Set the value on the field.
|
|
* Optionally takes the whole record as an argument,
|
|
* to pick other values.
|
|
*
|
|
* @param mixed $value
|
|
* @param array $record
|
|
*/
|
|
function setValue($value, $record = null) {
|
|
$this->value = $value;
|
|
}
|
|
|
|
/**
|
|
* Determines if the field has a value which
|
|
* is not considered to be 'null' in
|
|
* a database context.
|
|
*
|
|
* @return boolean
|
|
*/
|
|
function hasValue() {
|
|
return ($this->value);
|
|
}
|
|
|
|
/**
|
|
* @return bool
|
|
*/
|
|
public function exists() {
|
|
return $this->hasValue();
|
|
}
|
|
|
|
/**
|
|
* Return an encoding of the given value suitable
|
|
* for inclusion in a SQL statement. If necessary,
|
|
* this should include quotes.
|
|
*
|
|
* @param $value mixed The value to check
|
|
* @return string The encoded value
|
|
*/
|
|
function prepValueForDB($value) {
|
|
if($value === null || $value === "" || $value === false) {
|
|
return "null";
|
|
} else {
|
|
return "'" . Convert::raw2sql($value) . "'";
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Prepare the current field for usage in a
|
|
* database-manipulation (works on a manipulation reference).
|
|
*
|
|
* Make value safe for insertion into
|
|
* a SQL SET statement by applying addslashes() -
|
|
* can also be used to apply special SQL-commands
|
|
* to the raw value (e.g. for GIS functionality).
|
|
* {@see prepValueForDB}
|
|
*
|
|
* @param array $manipulation
|
|
*/
|
|
function writeToManipulation(&$manipulation) {
|
|
$manipulation['fields'][$this->name] = $this->hasValue() ? $this->prepValueForDB($this->value) : $this->nullValue();
|
|
}
|
|
|
|
/**
|
|
* Add custom query parameters for this field,
|
|
* mostly SELECT statements for multi-value fields.
|
|
*
|
|
* By default, the ORM layer does a
|
|
* SELECT <tablename>.* which
|
|
* gets you the default representations
|
|
* of all columns.
|
|
*
|
|
* @param SS_Query $query
|
|
*/
|
|
function addToQuery(&$query) {
|
|
|
|
}
|
|
|
|
function setTable($tableName) {
|
|
$this->tableName = $tableName;
|
|
}
|
|
|
|
/**
|
|
* @return string
|
|
*/
|
|
public function forTemplate() {
|
|
return $this->XML();
|
|
}
|
|
|
|
function HTMLATT() {
|
|
return Convert::raw2htmlatt($this->value);
|
|
}
|
|
|
|
function URLATT() {
|
|
return urlencode($this->value);
|
|
}
|
|
|
|
function RAWURLATT() {
|
|
return rawurlencode($this->value);
|
|
}
|
|
|
|
function ATT() {
|
|
return Convert::raw2att($this->value);
|
|
}
|
|
|
|
function RAW() {
|
|
return $this->value;
|
|
}
|
|
|
|
function JS() {
|
|
return Convert::raw2js($this->value);
|
|
}
|
|
|
|
function HTML(){
|
|
return Convert::raw2xml($this->value);
|
|
}
|
|
|
|
function XML(){
|
|
return Convert::raw2xml($this->value);
|
|
}
|
|
|
|
/**
|
|
* Returns the value to be set in the database to blank this field.
|
|
* Usually it's a choice between null, 0, and ''
|
|
*/
|
|
function nullValue() {
|
|
return "null";
|
|
}
|
|
|
|
/**
|
|
* Saves this field to the given data object.
|
|
*/
|
|
function saveInto($dataObject) {
|
|
$fieldName = $this->name;
|
|
if($fieldName) {
|
|
$dataObject->$fieldName = $this->value;
|
|
} else {
|
|
user_error("DBField::saveInto() Called on a nameless '" . get_class($this) . "' object", E_USER_ERROR);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Returns a FormField instance used as a default
|
|
* for form scaffolding.
|
|
*
|
|
* Used by {@link SearchContext}, {@link ModelAdmin}, {@link DataObject::scaffoldFormFields()}
|
|
*
|
|
* @param string $title Optional. Localized title of the generated instance
|
|
* @return FormField
|
|
*/
|
|
public function scaffoldFormField($title = null) {
|
|
$field = new TextField($this->name, $title);
|
|
|
|
return $field;
|
|
}
|
|
|
|
/**
|
|
* Returns a FormField instance used as a default
|
|
* for searchform scaffolding.
|
|
*
|
|
* Used by {@link SearchContext}, {@link ModelAdmin}, {@link DataObject::scaffoldFormFields()}.
|
|
*
|
|
* @param string $title Optional. Localized title of the generated instance
|
|
* @return FormField
|
|
*/
|
|
public function scaffoldSearchField($title = null) {
|
|
return $this->scaffoldFormField($title);
|
|
}
|
|
|
|
/**
|
|
* @todo documentation
|
|
*
|
|
* @todo figure out how we pass configuration parameters to
|
|
* search filters (note: parameter hack now in place to pass in the required full path - using $this->name won't work)
|
|
*
|
|
* @return SearchFilter
|
|
*/
|
|
public function defaultSearchFilter($name = false) {
|
|
$name = ($name) ? $name : $this->name;
|
|
$filterClass = $this->stat('default_search_filter_class');
|
|
return new $filterClass($name);
|
|
}
|
|
|
|
/**
|
|
* Add the field to the underlying database.
|
|
*/
|
|
abstract function requireField();
|
|
|
|
function debug() {
|
|
return <<<DBG
|
|
<ul>
|
|
<li><b>Name:</b>{$this->name}</li>
|
|
<li><b>Table:</b>{$this->tableName}</li>
|
|
<li><b>Value:</b>{$this->value}</li>
|
|
</ul>
|
|
DBG;
|
|
}
|
|
|
|
}
|