Customising filter for ModelAdmin to support date range in SilverStripe - silverstripe

Question

I am developing a SilverStripe project. I am now struggling with customizing the filter/ search for the ModelAdmin entities, https://silverstripe.org/learn/lessons/v4/introduction-to-modeladmin-1. I am trying to add a date range filter as follows.
As you can see there are from and to fields. I have a class called Property and I am trying to customize the search/ filter for the CMS as follow to support the date range filtering.
class Property extends DataObject
{
public function searchableFields()
{
return [
//other fields go here
'Created' => [
'filter' => 'GreaterThanOrEqualFilter',
'title' => 'From',
'field' => DateField::class
],
'Created' => [
'filter' => 'To',
'title' => 'Decision date until',
'field' => DateField::class
],
];
}
}
Only one field is added to the pop up because the array key is overridden. How can I configure it to have the two date fields to specify the date range for the search form?

Answer 1

It might not be relevant now but I bumped to this issue today and I tried your code, you are right, only one field is created I think because you are using single DateField::class. I tried to look for a module that creates a Date Range field and I only can find this one but it looks like it's a project specific.
In my case I have 2 date fields (created and ended), using your code I can get good results by tweaking it to something like this:
public function searchableFields()
{
return [
//other fields go here
'StartDate' => [
'filter' => 'GreaterThanOrEqualFilter',
'title' => 'From',
'field' => DateField::class
],
'EndDate' => [
'filter' => 'LessThanOrEqualFilter',
'title' => 'To',
'field' => DateField::class
],
];
}
Hope it helps someone.

Answer 2

Using this example DataObject create a custom update function updateAdminSearchFields...
app/src/Test/MyDataObject.php
namespace MyVendor\MyNamespace;
use SilverStripe\Forms\DateField;
use SilverStripe\ORM\DataObject;
class MyDataObject extends DataObject {
private static $db = [
'Title' => 'Varchar',
'MyDateTimeField' => 'DBDatetime'
];
private static $summary_fields = ['Title','MyDateTimeField'];
public function updateAdminSearchFields($fields) {
$fields->removeByName('MyDateTimeField');//needed as added in summary field
$fields->push(DateField::create('MyDateTimeField:GreaterThanOrEqual', 'MyDateTimeField (Start)'));
$fields->push(DateField::create('MyDateTimeField:LessThanOrEqual', 'MyDateTimeField (End)'));
}
}
Then create an extension that can link that to a ModelAdmin...
app/src/Test/MyAdminExtension.php
namespace MyVendor\MyNamespace;
use SilverStripe\ORM\DataExtension;
class MyAdminExtension extends DataExtension {
public function updateSearchContext($context) {
$class = $context->getQuery([])->dataClass();
if (method_exists($class, 'updateAdminSearchFields'))
(new $class)->updateAdminSearchFields($context->getFields());
return $context;
}
}
app/_config/mysite.yml
MyVendor\MyNamespace\MyAdmin:
extensions:
- MyVendor\MyNamespace\MyAdminExtension
Lastly on the ModelAdmin apply these filters...
app/src/Test/MyAdmin.php
namespace MyVendor\MyNamespace;
use SilverStripe\Admin\ModelAdmin;
class MyAdmin extends ModelAdmin {
private static $menu_title = 'MyAdmin';
private static $url_segment = 'myadmin';
private static $managed_models = [MyDataObject::class];
public function getList() {
$list = parent::getList();
if ($params = $this->getRequest()->requestVar('filter'))
if ($filters = $params[$this->sanitiseClassName($this->modelClass)])
return $list->filter($filters);
return $list;
}
}
This example is working on latest stable version 4.7.2