django-admin-autocomplete-filter-faisal 0.4
A simple Django app to render list filters in django admin using autocomplete widget

[![PyPI version](https://badge.fury.io/py/django-admin-autocomplete-filter.svg)](https://badge.fury.io/py/django-admin-autocomplete-filter)

Django Admin Autocomplete Filter
================================
A simple Django app to render list filters in django admin using autocomplete widget. This app is heavily inspired from [dal-admin-filters.](https://github.com/shamanu4/dal_admin_filters)

Overview:
---------

Django comes preshipped with an admin panel which is a great utility to create quick CRUD's.
The django 2.0 came with much needed [autocomplete_fields](https://docs.djangoproject.com/en/2.1/ref/contrib/admin/#django.contrib.admin.ModelAdmin.autocomplete_fields "autocomplete_fields") which uses select2 widget that comes with a search feature that loads the options asynchronously.
We can use this in django admin list filter.



Requirements:
-----------
Requires Django version >= 2.0

Installation:
------------
You can install it via pip or to get the latest version clone this repo.

`
pip install django-admin-autocomplete-filter-faisal
`

Add ``admin_auto_filters`` to your ``INSTALLED_APPS`` inside settings.py of your project.

Usage:
-----
Let's say we have following models:
``` python
class Artist(models.Model):
    name = models.CharField(max_length=128)

class Album(models.Model):
    name = models.CharField(max_length=64)
    artist = models.ForeignKey(Artist, on_delete=models.CASCADE)
    cover = models.CharField(max_length=256, null=True, default=None)
```
And you would like to filter results in Album Admin on the basis of artist, then you can define `search fields` in Artist and then define filter as:

``` python
from admin_auto_filters.filters import AutocompleteFilter

class ArtistFilter(AutocompleteFilter):
    title = 'Artist' # display title
    field_name = 'artist' # name of the foreign key field

class ArtistAdmin(admin.ModelAdmin):
    search_fields = ['name'] # this is required for django's autocomplete functionality
	...

class AlbumAdmin(admin.ModelAdmin):
    list_filter = [ArtistFilter]

    '''
       defining this class is required for AutocompleteFilter
       it's a bug and I am working on it.
    '''
    class Media:
        pass
	...
```

After following these steps you may see the filter as:

![](https://raw.githubusercontent.com/farhan0581/django-admin-autocomplete-filter/master/admin_auto_filters/media/screenshot1.png)

![](https://raw.githubusercontent.com/farhan0581/django-admin-autocomplete-filter/master/admin_auto_filters/media/screenshot2.png)


Now you can also register your custom view instead of using django admin's search_results to control the results in the autocomplete. For this you will need to create your custom view and register the url in your admin class as shown below:

In your views.py:

```python
from admin_auto_filters.views import AutocompleteJsonView

class CustomSearchView(AutocompleteJsonView):
    def get_queryset(self):
    '''
       your custom logic goes here.
    '''
        queryset = Artist.objects.all().order_by('name')
        return queryset
```

After this, register this view in your admin class as:

```python

class AlbumAdmin(admin.ModelAdmin):
    list_filter = [ArtistFilter]

    class Media:
        pass

    def get_urls(self):
        urls = super().get_urls()
        custom_urls = [
            path('custom_search/', self.admin_site.admin_view(CustomSearchView.as_view(model_admin=self)),
                 name='custom_search'),
        ]
        return custom_urls + urls
```

Finally just tell the filter class to use this new view as:

```python
class ArtistFilter(AutocompleteFilter):
    title = 'Artist'
    field_name = 'artist'

    def get_autocomplete_url(self, request, model_admin):
        return reverse('admin:custom_search')
```

License:
--------
Django Admin Autocomplete Filter is an Open Source project licensed under the terms of the GNU GENERAL PUBLIC LICENSE.