sortablegridfield/docs/HasManyExample.md

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