Expanded version of ModelAdmin that adds some extra features:

• Submitting SearchForm via a POST (meaning that complex fields that require an Ajax callback should now function).
• Saving search results to a session rather than using the query string.
• Adding bulk editing (using colymba/gridfield-bulk-editing-tools by default).
• When generating export fields for a DataObject also checks if the object has export_fields
• Automatically find and format DBDate/DBDatetime fields to DBDate.Nice

Install this module via composer:

composer require i-lateral/silverstripe-modeladminplus

This module is designed to be "hot-swappable" with standard ModelAdmin extensions. To generate your own admin interface using it, simply have you custom ModelAdmin extend ModelAdminPlus (instead of ModelAdmin). For example:

use ilateral\SilverStripe\ModelAdminPlus\ModelAdminPlus;

class MyModelAdmin extends ModelAdminPlus
{

  // Add standard ModelAdmin code here

}

ModelAdminPlus allows for a DataObject to define it's own export_fields when it performs a bulk export. Export fields are a config variable, and are defined in exactly the same way as summary_fields, EG:

class MyDataObject extends DataObject
{
  private static $db = [
    "Name" => "Varchar",
    "URL"  => "Varchar(255)"
  ];

  /**
   * Fields shown in GridField
   *
   * @return array
   */
  private static $summary_fields = [
    "ID" => "ID",
    "Name" => "Your Name"
  ];

  /**
   * Custom fields to export to CSV in
   * ModelAdminPlus
   *
   * @return array
   */
  private static $export_fields = [
    "Name" => "Your Name",
    "URL"  => "Website"
  ];
}

You can also overwrite the export_fields using the updateExportFields extension hook.

If you do not want ModelAdminPlus to automatically convert DBDate/DBDateTime fields to a formatted column (default to DBDate.Nice), you can disable this via SilverStripe config, using:

ilateral\SilverStripe\ModelAdminPlus.auto_convert_dates

If you want to change how ModelAdminPlus formats dates (without effecting the Nice method), you can do this via the helper class GridFieldDateFinder. You can configure this either globally, or per instance called.

You can change all instances of date re-format by setting the following SilverStripe config variable:

ilateral\SilverStripe\ModelAdminPlus.default_date_type

You can change specific instances of the date format every time you call the GridFieldDateFinder class, by using the following method:

ilateral\SilverStripe\ModelAdminPlus::setDateType("newDateType")