admin.ModelAdmin.formfield_overrides

ModelAdmin.formfield_overrides

This provides a quick-and-dirty way to override some of the Field options for use in the admin. formfield_overrides is a dictionary mapping a field class to a dict of arguments to pass to the field at construction time.

Since that’s a bit abstract, let’s look at a concrete example. The most common use of formfield_overrides is to add a custom widget for a certain type of field. So, imagine we’ve written a RichTextEditorWidget that we’d like to use for large text fields instead of the default <textarea>. Here’s how we’d do that:

from django.db import models
from django.contrib import admin

# Import our custom widget and our model from where they're defined
from myapp.widgets import RichTextEditorWidget
from myapp.models import MyModel

class MyModelAdmin(admin.ModelAdmin):
    formfield_overrides = {
        models.TextField: {'widget': RichTextEditorWidget},
    }

Note that the key in the dictionary is the actual field class, not a string. The value is another dictionary; these arguments will be passed to the form field’s __init__() method. See The Forms API for details.