sortablegridfield/docs/ManyManyExample.md

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many_many Example
=================
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```php
/*** TestPage.php ***/
use SilverStripe\Forms\GridField\GridField;
use SilverStripe\Forms\GridField\GridFieldConfig_RelationEditor;
use UndefinedOffset\SortableGridField\Forms\GridFieldSortableRows;
class TestPage extends Page
{
private static $many_many = [
'TestObjects' => 'TestObject',
];
private static $many_many_extraFields = [
'TestObjects' => [
'SortOrder' => 'Int',
]
];
public function getCMSFields()
{
$fields = parent::getCMSFields();
$conf = GridFieldConfig_RelationEditor::create(10);
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$conf->addComponent(new GridFieldSortableRows('SortOrder'));
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$fields->addFieldToTab('Root.TestObjects', new GridField('TestObjects', 'TestObjects', $this->TestObjects(), $conf));
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return $fields;
}
public function TestObjects()
{
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return $this->getManyManyComponents('TestObjects')->sort('SortOrder');
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}
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}
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/*** TestObject.php ***/
use SilverStripe\ORM\DataObject;
class TestObject extends DataObject
{
private static $db = [
'Title' => 'Text',
];
private static $belongs_many_many = [
'TestPages' => 'TestPage',
];
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}
```