silverstripe-framework/docs/en/04_Changelogs/4.3.0.md
2018-10-09 17:33:23 +13:00

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# 4.3.0
## Overview {#overview}
- `DataList::column()` now returns all values and not just "distinct" values from a column as per the API docs
- `DataList`, `ArrayList` and `UnsavedRalationList` all have `columnUnique()` method for fetching distinct column values
- Take care with `stageChildren()` overrides. `Hierarchy::numChildren() ` results will only make use of `stageChildren()` customisations that are applied to the base class and don't include record-specific behaviour.
- New React-based search UI for the CMS, Asset-Admin, GridFields and ModelAdmins.
- A new `GridFieldLazyLoader` component can be added to `GridField`. This will delay the fetching of data until the user access the container Tab of the GridField.
## Upgrading {#upgrading}
### Fetching distinct column values on DataList
Prior to this release `DataList` would erroneously return a distinct list of values from a column on an object.
If this behaviour is still required, please use `columnUnique()` instead.
### Using legacy GridField search API
GridFields now default to using the new search UI which uses [SilverStripe's FormSchema API](api:SilverStripe\Forms\Schema\FormSchema).
If you would rather continue using the old search API, you can remove the default `GridFieldFilterHeader` from your GridField configuration and replace with one whose _legacy_ flag has been enabled.
To enable the legacy search API on a `GridFieldFilterHeader`, you can either:
* set the `useLegacyFilterHeader` property to `true`,
* or pass `true` to the first argument of its constructor.
```php
public function getCMSFields()
{
$fields = parent::getCMSFields();
// Configure grid field to use legacy search API
$config = new GridFieldConfig_RecordEditor();
$config->getComponentsByType(GridFieldFilterHeader::class)->useLegacyFilterHeader = true;
$grid = GridField::create('Companies', 'Companies', DataList::create(Company::class), $config);
$fields->addFieldToTab('Root.Company', $grid);
return $fields;
}
```