silverstripe-gridfieldexten.../src/GridFieldOrderableRows.php

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<?php
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namespace Symbiote\GridFieldExtensions;
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use Exception;
use SilverStripe\Control\Controller;
use SilverStripe\Control\HTTPRequest;
use SilverStripe\Control\HTTPResponse_Exception;
use SilverStripe\Control\RequestHandler;
use SilverStripe\Core\ClassInfo;
use SilverStripe\Forms\GridField\GridField;
use SilverStripe\Forms\GridField\GridField_ColumnProvider;
use SilverStripe\Forms\GridField\GridField_DataManipulator;
use SilverStripe\Forms\GridField\GridField_HTMLProvider;
use SilverStripe\Forms\GridField\GridField_SaveHandler;
use SilverStripe\Forms\GridField\GridField_URLHandler;
use SilverStripe\Forms\GridField\GridFieldPaginator;
use SilverStripe\Forms\HiddenField;
use SilverStripe\ORM\ArrayList;
use SilverStripe\ORM\DataList;
use SilverStripe\ORM\DataObject;
use SilverStripe\ORM\DataObjectInterface;
use SilverStripe\ORM\DataObjectSchema;
use SilverStripe\ORM\DB;
use SilverStripe\ORM\FieldType\DBDatetime;
use SilverStripe\ORM\ManyManyList;
use SilverStripe\ORM\ManyManyThroughList;
use SilverStripe\ORM\ManyManyThroughQueryManipulator;
use SilverStripe\ORM\SS_List;
use SilverStripe\Versioned\Versioned;
use SilverStripe\View\ViewableData;
/**
* Allows grid field rows to be re-ordered via drag and drop. Both normal data
* lists and many many lists can be ordered.
*
* If the grid field has not been sorted, this component will sort the data by
* the sort field.
*/
class GridFieldOrderableRows extends RequestHandler implements
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GridField_ColumnProvider,
GridField_DataManipulator,
GridField_HTMLProvider,
GridField_URLHandler,
GridField_SaveHandler
{
/**
* @see $immediateUpdate
* @var boolean
*/
private static $default_immediate_update = true;
private static $allowed_actions = array(
'handleReorder',
'handleMoveToPage'
);
/**
* The database field which specifies the sort, defaults to "Sort".
*
* @see setSortField()
* @var string
*/
protected $sortField;
/**
* If set to true, when an item is re-ordered, it will update on the
* database and refresh the gridfield. When set to false, it will only
* update the sort order when the record is saved.
*
* @var boolean
*/
protected $immediateUpdate;
/**
* Extra sort fields to apply before the sort field.
*
* @see setExtraSortFields()
* @var string|array
*/
protected $extraSortFields = null;
/**
* The number of the column containing the reorder handles
*
* @see setReorderColumnNumber()
* @var int
*/
protected $reorderColumnNumber = 0;
/**
* @param string $sortField
*/
public function __construct($sortField = 'Sort')
{
parent::__construct();
$this->sortField = $sortField;
$this->immediateUpdate = $this->config()->default_immediate_update;
}
/**
* @return string
*/
public function getSortField()
{
return $this->sortField;
}
/**
* Sets the field used to specify the sort.
*
* @param string $sortField
* @return GridFieldOrderableRows $this
*/
public function setSortField($field)
{
$this->sortField = $field;
return $this;
}
/**
* @return boolean
*/
public function getImmediateUpdate()
{
return $this->immediateUpdate;
}
/**
* @see $immediateUpdate
* @param boolean $immediateUpdate
* @return GridFieldOrderableRows $this
*/
public function setImmediateUpdate($bool)
{
$this->immediateUpdate = $bool;
return $this;
}
/**
* @return string|array
*/
public function getExtraSortFields()
{
return $this->extraSortFields;
}
/**
* Checks to see if the relationship list is for a type of many_many
*
* @param SS_List $list
*
* @return bool
*/
protected function isManyMany(SS_List $list)
{
return $list instanceof ManyManyList || $list instanceof ManyManyThroughList;
}
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/**
* Sets extra sort fields to apply before the sort field.
*
* @param string|array $fields
* @return GridFieldOrderableRows $this
*/
public function setExtraSortFields($fields)
{
$this->extraSortFields = $fields;
return $this;
}
/**
* @return int
*/
public function getReorderColumnNumber()
{
return $this->reorderColumnNumber;
}
/**
* Sets the number of the column containing the reorder handles.
*
* @param int $colno
* @return GridFieldOrderableRows $this
*/
public function setReorderColumnNumber($colno)
{
$this->reorderColumnNumber = $colno;
return $this;
}
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/**
* Validates sortable list
*
* @param SS_List $list
* @throws Exception
*/
public function validateSortField(SS_List $list)
{
$field = $this->getSortField();
// Check extra fields on many many relation types
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if ($list instanceof ManyManyList) {
$extra = $list->getExtraFields();
if ($extra && array_key_exists($field, $extra)) {
return;
}
} elseif ($list instanceof ManyManyThroughList) {
$manipulator = $this->getManyManyInspector($list);
$fieldTable = DataObject::getSchema()->tableForField($manipulator->getJoinClass(), $field);
if ($fieldTable) {
return;
}
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}
$classes = ClassInfo::dataClassesFor($list->dataClass());
foreach ($classes as $class) {
if (singleton($class)->hasDataBaseField($field)) {
return;
}
}
throw new Exception("Couldn't find the sort field '" . $field . "'");
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}
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/**
* Gets the table which contains the sort field.
*
* @param DataList $list
* @return string
*/
public function getSortTable(SS_List $list)
{
$field = $this->getSortField();
if ($list instanceof ManyManyList) {
$extra = $list->getExtraFields();
$table = $list->getJoinTable();
if ($extra && array_key_exists($field, $extra)) {
return $table;
}
} elseif ($list instanceof ManyManyThroughList) {
return $this->getManyManyInspector($list)->getJoinAlias();
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}
$classes = ClassInfo::dataClassesFor($list->dataClass());
foreach ($classes as $class) {
if (singleton($class)->hasDataBaseField($field)) {
return DataObject::getSchema()->tableName($class);
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}
}
throw new Exception("Couldn't find the sort field '$field'");
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}
public function getURLHandlers($grid)
{
return array(
'POST reorder' => 'handleReorder',
'POST movetopage' => 'handleMoveToPage'
);
}
/**
* @param GridField $field
*/
public function getHTMLFragments($field)
{
GridFieldExtensions::include_requirements();
$field->addExtraClass('ss-gridfield-orderable');
$field->setAttribute('data-immediate-update', (string)(int)$this->immediateUpdate);
$field->setAttribute('data-url-reorder', $field->Link('reorder'));
$field->setAttribute('data-url-movetopage', $field->Link('movetopage'));
}
public function augmentColumns($grid, &$cols)
{
if (!in_array('Reorder', $cols) && $grid->getState()->GridFieldOrderableRows->enabled) {
array_splice($cols, $this->reorderColumnNumber, 0, 'Reorder');
}
}
public function getColumnsHandled($grid)
{
return array('Reorder');
}
public function getColumnContent($grid, $record, $col)
{
// In case you are using GridFieldEditableColumns, this ensures that
// the correct sort order is saved. If you are not using that component,
// this will be ignored by other components, but will still work for this.
$sortFieldName = sprintf(
'%s[GridFieldEditableColumns][%s][%s]',
$grid->getName(),
$record->ID,
$this->getSortField()
);
// Default: Get the sort field directly from the current record
$currentSortValue = $record->getField($this->getSortField());
$list = $grid->getList();
if ($list instanceof ManyManyThroughList) {
// In a many many through list we should get the current sort order from the relationship
// if it exists, not directly from the record
$throughListSorts = $this->getSortValuesFromManyManyThroughList($list, $this->getSortField());
if (array_key_exists($record->ID, $throughListSorts)) {
$currentSortValue = $throughListSorts[$record->ID];
}
}
$sortField = HiddenField::create($sortFieldName, false, $currentSortValue);
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$sortField->addExtraClass('ss-orderable-hidden-sort');
$sortField->setForm($grid->getForm());
return ViewableData::create()->customise(array(
'SortField' => $sortField
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))->renderWith('Symbiote\\GridFieldExtensions\\GridFieldOrderableRowsDragHandle');
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}
public function getColumnAttributes($grid, $record, $col)
{
return array('class' => 'col-reorder');
}
public function getColumnMetadata($grid, $col)
{
if ($fieldLabels = singleton($grid->getModelClass())->fieldLabels()) {
return array('title' => isset($fieldLabels['Reorder']) ? $fieldLabels['Reorder'] : '');
}
return array('title' => '');
}
public function getManipulatedData(GridField $grid, SS_List $list)
{
$state = $grid->getState();
$sorted = (bool) ((string) $state->GridFieldSortableHeader->SortColumn);
// If the data has not been sorted by the user, then sort it by the
// sort column, otherwise disable reordering.
$state->GridFieldOrderableRows->enabled = !$sorted;
if (!$sorted) {
$sortterm = '';
if ($this->extraSortFields) {
if (is_array($this->extraSortFields)) {
foreach ($this->extraSortFields as $col => $dir) {
$sortterm .= "$col $dir, ";
}
} else {
$sortterm = $this->extraSortFields.', ';
}
}
if ($list instanceof ArrayList) {
// Fix bug in 3.1.3+ where ArrayList doesn't account for quotes
$sortterm .= $this->getSortTable($list).'.'.$this->getSortField();
} else {
$sortterm .= '"'.$this->getSortTable($list).'"."'.$this->getSortField().'"';
}
return $list->sort($sortterm);
}
return $list;
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}
/**
* Handles requests to reorder a set of IDs in a specific order.
*
* @param GridField $grid
* @param HTTPRequest $request
* @return string
* @throws HTTPResponse_Exception
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*/
public function handleReorder($grid, $request)
{
if (!$this->immediateUpdate) {
$this->httpError(400);
}
$list = $grid->getList();
$modelClass = $grid->getModelClass();
$isManyMany = $this->isManyMany($list);
if ($isManyMany && !singleton($modelClass)->canView()) {
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$this->httpError(403);
} elseif (!$isManyMany && !singleton($modelClass)->canEdit()) {
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$this->httpError(403);
}
// Save any un-committed changes to the gridfield
if (($form = $grid->getForm()) && ($record = $form->getRecord())) {
$form->loadDataFrom($request->requestVars(), true);
$grid->saveInto($record);
}
// Get records from the `GridFieldEditableColumns` column
$data = $request->postVar($grid->getName());
$sortedIDs = $this->getSortedIDs($data);
if (!$this->executeReorder($grid, $sortedIDs)) {
$this->httpError(400);
}
Controller::curr()->getResponse()->addHeader('X-Status', rawurlencode('Records reordered.'));
return $grid->FieldHolder();
}
/**
* Get mapping of sort value to item ID from posted data (gridfield list state), ordered by sort value.
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*
* @param array $data Raw posted data
* @return array [sortIndex => recordID]
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*/
protected function getSortedIDs($data)
{
if (empty($data['GridFieldEditableColumns'])) {
return array();
}
$sortedIDs = array();
foreach ($data['GridFieldEditableColumns'] as $id => $recordData) {
$sortValue = $recordData[$this->sortField];
$sortedIDs[$sortValue] = $id;
}
ksort($sortedIDs);
return $sortedIDs;
}
/**
* Handles requests to move an item to the previous or next page.
*/
public function handleMoveToPage(GridField $grid, $request)
{
if (!$paginator = $grid->getConfig()->getComponentByType(GridFieldPaginator::class)) {
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$this->httpError(404, 'Paginator component not found');
}
$move = $request->postVar('move');
$field = $this->getSortField();
$list = $grid->getList();
$manip = $grid->getManipulatedList();
$existing = $manip->map('ID', $field)->toArray();
$values = $existing;
$order = array();
$id = isset($move['id']) ? (int) $move['id'] : null;
$to = isset($move['page']) ? $move['page'] : null;
if (!isset($values[$id])) {
$this->httpError(400, 'Invalid item ID');
}
$this->populateSortValues($list);
$page = ((int) $grid->getState()->GridFieldPaginator->currentPage) ?: 1;
$per = $paginator->getItemsPerPage();
if ($to == 'prev') {
$swap = $list->limit(1, ($page - 1) * $per - 1)->first();
$values[$swap->ID] = $swap->$field;
$order[] = $id;
$order[] = $swap->ID;
foreach ($existing as $_id => $sort) {
if ($id != $_id) {
$order[] = $_id;
}
}
} elseif ($to == 'next') {
$swap = $list->limit(1, $page * $per)->first();
$values[$swap->ID] = $swap->$field;
foreach ($existing as $_id => $sort) {
if ($id != $_id) {
$order[] = $_id;
}
}
$order[] = $swap->ID;
$order[] = $id;
} else {
$this->httpError(400, 'Invalid page target');
}
$this->reorderItems($list, $values, $order);
return $grid->FieldHolder();
}
/**
* Handle saving when 'immediateUpdate' is disabled, otherwise this isn't
* necessary for the default sort mode.
*/
public function handleSave(GridField $grid, DataObjectInterface $record)
{
if (!$this->immediateUpdate) {
$value = $grid->Value();
$sortedIDs = $this->getSortedIDs($value);
if ($sortedIDs) {
$this->executeReorder($grid, $sortedIDs);
}
}
}
/**
* @param GridField $grid
* @param array $sortedIDs List of IDS, where the key is the sort field value to save
* @return bool
*/
protected function executeReorder(GridField $grid, $sortedIDs)
{
if (!is_array($sortedIDs) || empty($sortedIDs)) {
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return false;
}
$sortField = $this->getSortField();
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$sortterm = '';
if ($this->extraSortFields) {
if (is_array($this->extraSortFields)) {
foreach ($this->extraSortFields as $col => $dir) {
$sortterm .= "$col $dir, ";
}
} else {
$sortterm = $this->extraSortFields.', ';
}
}
$list = $grid->getList();
$sortterm .= '"'.$this->getSortTable($list).'"."'.$sortField.'"';
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$items = $list->filter('ID', $sortedIDs)->sort($sortterm);
// Ensure that each provided ID corresponded to an actual object.
if (count($items) != count($sortedIDs)) {
return false;
}
// Populate each object we are sorting with a sort value.
$this->populateSortValues($items);
// Generate the current sort values.
if ($items instanceof ManyManyList) {
$current = array();
foreach ($items->toArray() as $record) {
// NOTE: _SortColumn0 is the first ->sort() field
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// used by SS when functions are detected in a SELECT
// or CASE WHEN.
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if (isset($record->_SortColumn0)) {
$current[$record->ID] = $record->_SortColumn0;
} else {
$current[$record->ID] = $record->$sortField;
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}
}
} elseif ($items instanceof ManyManyThroughList) {
$current = $this->getSortValuesFromManyManyThroughList($list, $sortField);
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} else {
$current = $items->map('ID', $sortField)->toArray();
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}
// Perform the actual re-ordering.
$this->reorderItems($list, $current, $sortedIDs);
return true;
}
/**
* @param SS_List $list
* @param array $values **UNUSED** [listItemID => currentSortValue];
* @param array $sortedIDs [newSortValue => listItemID]
*/
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protected function reorderItems($list, array $values, array $sortedIDs)
{
// setup
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$sortField = $this->getSortField();
$class = $list->dataClass();
// The problem is that $sortedIDs is a list of the _related_ item IDs, which causes trouble
// with ManyManyThrough, where we need the ID of the _join_ item in order to set the value.
$itemToSortReference = ($list instanceof ManyManyThroughList) ? 'getJoin' : 'Me';
$currentSortList = $list->map('ID', $itemToSortReference)->toArray();
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// sanity check.
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$this->validateSortField($list);
$isVersioned = false;
// check if sort column is present on the model provided by dataClass() and if it's versioned
// cases:
// Model has sort column and is versioned - handle as versioned
// Model has sort column and is NOT versioned - handle as NOT versioned
// Model doesn't have sort column because sort column is on ManyManyList - handle as NOT versioned
// Model doesn't have sort column because sort column is on ManyManyThroughList - inspect through object
if ($list instanceof ManyManyThroughList) {
// We'll be updating the join class, not the relation class.
$class = $this->getManyManyInspector($list)->getJoinClass();
$isVersioned = $class::create()->hasExtension(Versioned::class);
} elseif (!$this->isManyMany($list)) {
$isVersioned = $class::create()->hasExtension(Versioned::class);
}
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// Loop through each item, and update the sort values which do not
// match to order the objects.
if (!$isVersioned) {
$sortTable = $this->getSortTable($list);
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$now = DBDatetime::now()->Rfc2822();
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$additionalSQL = '';
$baseTable = DataObject::getSchema()->baseDataTable($class);
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$isBaseTable = ($baseTable == $sortTable);
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if (!$list instanceof ManyManyList && $isBaseTable) {
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$additionalSQL = ", \"LastEdited\" = '$now'";
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}
foreach ($sortedIDs as $newSortValue => $targetRecordID) {
if ($currentSortList[$targetRecordID]->$sortField != $newSortValue) {
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DB::query(sprintf(
'UPDATE "%s" SET "%s" = %d%s WHERE %s',
$sortTable,
$sortField,
$newSortValue,
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$additionalSQL,
$this->getSortTableClauseForIds($list, $targetRecordID)
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));
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if (!$isBaseTable && !$list instanceof ManyManyList) {
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DB::query(sprintf(
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'UPDATE "%s" SET "LastEdited" = \'%s\' WHERE %s',
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$baseTable,
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$now,
$this->getSortTableClauseForIds($list, $targetRecordID)
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));
}
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}
}
} else {
// For versioned objects, modify them with the ORM so that the
// *_Versions table is updated. This ensures re-ordering works
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// similar to the SiteTree where you change the position, and then
// you go into the record and publish it.
foreach ($sortedIDs as $newSortValue => $targetRecordID) {
// either the list data class (has_many, (belongs_)many_many)
// or the intermediary join class (many_many through)
$record = $currentSortList[$targetRecordID];
if ($record->$sortField != $newSortValue) {
$record->$sortField = $newSortValue;
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$record->write();
}
}
}
$this->extend('onAfterReorderItems', $list, $values, $sortedIDs);
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}
protected function populateSortValues(DataList $list)
{
$list = clone $list;
$field = $this->getSortField();
$table = $this->getSortTable($list);
$clause = sprintf('"%s"."%s" = 0', $table, $this->getSortField());
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$now = DBDatetime::now()->Rfc2822();
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$additionalSQL = '';
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$baseTable = DataObject::getSchema()->baseDataTable($list->dataClass());
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$isBaseTable = ($baseTable == $table);
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if (!$list instanceof ManyManyList && $isBaseTable) {
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$additionalSQL = ", \"LastEdited\" = '$now'";
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}
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foreach ($list->where($clause)->column('ID') as $id) {
$max = DB::query(sprintf('SELECT MAX("%s") + 1 FROM "%s"', $field, $table));
$max = $max->value();
DB::query(sprintf(
'UPDATE "%s" SET "%s" = %d%s WHERE %s',
$table,
$field,
$max,
$additionalSQL,
$this->getSortTableClauseForIds($list, $id)
));
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if (!$isBaseTable && !$this->isManyMany($list)) {
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DB::query(sprintf(
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'UPDATE "%s" SET "LastEdited" = \'%s\' WHERE %s',
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$baseTable,
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$now,
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$this->getSortTableClauseForIds($list, $id)
));
}
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}
}
/**
* Forms a WHERE clause for the table the sort column is defined on.
* e.g. ID = 5
* e.g. ID IN(5, 8, 10)
* e.g. SortOrder = 5 AND RelatedThing.ID = 3
* e.g. SortOrder IN(5, 8, 10) AND RelatedThing.ID = 3
*
* @param DataList $list
* @param int|string|array $ids a single number, or array of numbers
*
* @return string
*/
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protected function getSortTableClauseForIds(DataList $list, $ids)
{
if (is_array($ids)) {
$value = 'IN (' . implode(', ', array_map('intval', $ids)) . ')';
} else {
$value = '= ' . (int) $ids;
}
if ($this->isManyMany($list)) {
$introspector = $this->getManyManyInspector($list);
$extra = $list instanceof ManyManyList ?
$introspector->getExtraFields() :
DataObjectSchema::create()->fieldSpecs($introspector->getJoinClass(), DataObjectSchema::DB_ONLY);
$key = $introspector->getLocalKey();
$foreignKey = $introspector->getForeignKey();
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$foreignID = (int) $list->getForeignID();
if ($extra && array_key_exists($this->getSortField(), $extra)) {
return sprintf(
'"%s" %s AND "%s" = %d',
$key,
$value,
$foreignKey,
$foreignID
);
}
}
return "\"ID\" $value";
}
/**
* A ManyManyList defines functions such as getLocalKey, however on ManyManyThroughList
* these functions are moved to ManyManyThroughQueryManipulator, but otherwise retain
* the same signature.
*
* @param ManyManyList|ManyManyThroughList $list
*
* @return ManyManyList|ManyManyThroughQueryManipulator
*/
protected function getManyManyInspector($list)
{
$inspector = $list;
if ($list instanceof ManyManyThroughList) {
foreach ($list->dataQuery()->getDataQueryManipulators() as $manipulator) {
if ($manipulator instanceof ManyManyThroughQueryManipulator) {
$inspector = $manipulator;
break;
}
}
}
return $inspector;
}
/**
* Used to get sort orders from a many many through list relationship record, rather than the current
* record itself.
*
* @param ManyManyList|ManyManyThroughList $list
* @return int[] Sort orders for the
*/
protected function getSortValuesFromManyManyThroughList($list, $sortField)
{
$manipulator = $this->getManyManyInspector($list);
// Find the foreign key name, ID and class to look up
$joinClass = $manipulator->getJoinClass();
$fromRelationName = $manipulator->getForeignKey();
$toRelationName = $manipulator->getLocalKey();
// Create a list of the MMTL relations
$sortlist = DataList::create($joinClass)->filter([
$toRelationName => $list->column('ID'),
// first() is safe as there are earlier checks to ensure our list to sort is valid
$fromRelationName => $list->first()->getJoin()->$fromRelationName,
]);
return $sortlist->map($toRelationName, $sortField)->toArray();
}
}