select2_from_ajax with grouping

[hagealex]

Hello!

I have a Backpack 6.7.29 with Pro running on my Laravel 10.

In my use case I have a Event and a Location model. An "Event" is meant to be something like an exhibition or a concert. The Location, of course, where this Event takes place.

When creating an Event I use the select2_from_ajax field to assign a Location. To provide a better UX to my users I want to show "recently used locations" within the select. Then the user wouldn't have to always search for the same location name over and over againand can re-use from the ones he already used.

My current fetch method for this field looks like this:

public function fetchLocation()
    {
        return $this->fetch([
            'model'                 => Location::class,
            'searchable_attributes' => ['name'],
            'paginate'              => 10,
            'searchOperator'        => 'LIKE',
            'query'                 => function ($model) {
                return $model;
            },
        ]);
    }

My questions:

1. Is it possible to add custom entries to the results of the select2_from_ajax field?
2. If yes, is it possible to group them in an optgroup ?

If this is not possible with the given fields from Backpack I think must build a custom field then?

I'm glad for every help here :)

Thanks in advance!

[backpack-ai-bot[bot]]

Based on the available knowledge sources:

1. Is it possible to add custom entries to the results of the select2_from_ajax field?

   The knowledge sources do not explicitly mention a built-in way to add custom entries (such as "recently used locations") to the results of the select2_from_ajax field in Backpack. The fetch method is designed to return results from a model query, and while you can customize the query, there is no documented way to inject arbitrary or "custom" entries outside of the model's data directly into the results using the standard field.

2. Is it possible to group them in an optgroup?

   Grouping (using <optgroup>) is supported in Backpack via the select2_grouped field, which allows you to group options by a related entity. However, this field does not support AJAX loading—options are loaded statically from the database. There is currently no official select2_from_ajax_grouped field in Backpack Pro. The official answer to a similar question is that such a field does not exist, but you can create your own by copying and customizing the select2_from_ajax field:

   php artisan backpack:field select2_from_ajax_grouped --from=select2_from_ajax

   You would then need to implement the logic for grouping and custom entries yourself in this custom field. This is the recommended approach if you need AJAX loading with grouped options or custom entries in the results [Select2_from_ajax_grouped].

Summary:

• There is no built-in way to add custom entries or group them in select2_from_ajax.
• For grouped AJAX selects, you must create a custom field by extending select2_from_ajax and implementing the grouping and custom entry logic yourself.

If you need further guidance on how to implement such a custom field, let me know!

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Relevant sources:

Github Issue (closed): [Feature Request] Ability to populate a select2_from_ajax filter using the Fetch operation
Filters PRO|Select2_ajax Part 2
Github Issue (closed): Still Confuse about Select2 Ajax
Fields|select2_from_ajax PRO Part 1
Dependant select2 with ajax
Github Issue (closed): Add a scope to Select2
Github Issue (closed): how to pass some parameter in select2_from_ajax
Github Issue (closed): [Feature Request] Adding Crud Entities in the select field type
Github Issue (closed): Ajax for select2
Display custom attribute to user while using select2_from_ajax field with Fetch and InlineCreation
[Feature][3.5][Ready] Select2 grouped
Github Issue (closed): Select(2) for grouped options
Select2_from_ajax_grouped