sortablegridfield/docs/ManyManyExample.md

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many_many Example
=================
Please note this example is written with 3.0.x in mind, if you are using 3.1.x make sure you scope all static properties to private not public.
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```php
/*** TestPage.php ***/
class TestPage extends Page {
public static $many_many=array(
'TestObjects'=>'TestObject'
);
public static $many_many_extraFields=array(
'TestObjects'=>array(
'SortOrder'=>'Int'
)
);
public function getCMSFields() {
$fields=parent::getCMSFields();
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$conf=GridFieldConfig_RelationEditor::create(10);
$conf->addComponent(new GridFieldSortableRows('SortOrder'));
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$fields->addFieldToTab('Root.TestObjects', new GridField('TestObjects', 'TestObjects', $this->TestObjects(), $conf));
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return $fields;
}
public function TestObjects() {
return $this->getManyManyComponents('TestObjects')->sort('SortOrder');
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}
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}
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/*** TestObject.php ***/
class TestObject extends DataObject {
public static $db=array(
'Title'=>'Text'
);
public static $belongs_many_many=array(
'TestPages'=>'TestPage'
);
}
```