admin_pretty_gfk

Custom Django admin mixin and widgets for handling generic foreign keys (GFKs) more intuitively.

Features

• PrettyGFKModelAdminMixin: A mixin that enhances Django's admin interface for models with GFKs.
• ForeignKeyContentIdWidget: A raw ID widget with a fallback URL to prevent errors.
• ContentTypeSelect: A dropdown widget that dynamically updates related object selection and resets the foreign key field when the content type changes.

Installation

pip install admin_pretty_gfk

Usage

Import and Use in ModelAdmin

Using the Mixin

from admin_pretty_gfk.mixins import PrettyGFKModelAdminMixin
from django.contrib import admin

class AdvertAdmin(PrettyGFKModelAdminMixin, admin.ModelAdmin):
    pass

Using the Widget

from admin_pretty_gfk.widgets import ContentTypeSelect, ForeignKeyContentIdWidget
from django import forms
from django.contrib import admin
from django.core.exceptions import ObjectDoesNotExist
from django.db.models import ManyToOneRel

from common.models import Buy, Sell, Rent, Advert

class AdvertModelForm(forms.ModelForm):
    def __init__(self, *args, **kwargs):
        super(AdvertModelForm, self).__init__(*args, **kwargs)
        try:
            model = self.instance.content_type.model_class()
            model_key = model._meta.pk.name
        except (AttributeError, ObjectDoesNotExist):
            model = self.fields['content_type'].queryset[0].model_class()
            model_key = 'id'
        self.fields['object_id'].widget = ForeignKeyContentIdWidget(
            rel=ManyToOneRel(model_key, model, 'id'),
            admin_site=admin.site
        )

    class Meta:
        model = Advert
        fields = "__all__"
        widgets = {
            'content_type': ContentTypeSelect
        }

class AdvertAdmin(admin.ModelAdmin):
    form = AdvertModelForm

Registering Models

admin.site.register(Buy)
admin.site.register(Sell)
admin.site.register(Rent)
admin.site.register(Advert, AdvertAdmin)

How It Works

1. PrettyGFKModelAdminMixin automates form handling for models with GFKs.
2. ContentTypeSelect updates object selection dynamically when the content type changes.
3. ForeignKeyContentIdWidget ensures proper URL handling for related objects.

Screenshots

Default create form Create form with admin_pretty_gfk Default edit object form Edit object form with admin_pretty_gfk

License

This project is licensed under the MIT License.