Wagtail-TreeModelAdmin is an extension for Wagtail's wagtail-modeladmin that allows for a page explorer-like navigation of Django model relationships within the Wagtail admin.

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• Python 3.8+
• Django 3.2 (LTS), 4.1 (current)
• Wagtail 5.1+
• wagtail-modeladmin

It should be compatible with all intermediate versions, as well. If you find that it is not, please file an issue.

1. Install wagtail-treemodeladmin:

pip install wagtail-treemodeladmin

2. Add treemodeladmin (and wagtail_modeladmin if it's not already) as an installed app in your Django settings.py:

INSTALLED_APPS = (
    ...
    'wagtail_modeladmin',
    'treemodeladmin',
    ...
)

Wagtail-TreeModelAdmin allows for a Wagtail page explorer-like navigation of Django one-to-many relationships within the Wagtail admin. In doing this, it conceptualizes the Django ForeignKey relationship as one of parents-to-children. The parent is the destination to of the ForeignKey relationship, the child is the source of the relationship.

Wagtail-TreeModelAdmin is an extension of wagtail-modeladmin. It is intended to be used exactly like ModelAdmin.

To use Wagtail-TreeModelAdmin you first need to define some models that will be exposed in the Wagtail Admin.

# libraryapp/models.py

from django.db import models


class Author(models.Model):
    name = models.CharField(max_length=255)

class Book(models.Model):
    author = models.ForeignKey(Author, on_delete=models.PROTECT)
    title = models.CharField(max_length=255)

Then create the TreeModelAdmin subclasses and register the root the tree using modeladmin_register:

# libraryapp/wagtail_hooks.py
from wagtail_modeladmin.options import modeladmin_register

from treemodeladmin.options import TreeModelAdmin

from libraryapp.models import Author, Book


class BookModelAdmin(TreeModelAdmin):
    model = Book
    parent_field = 'author'


@modeladmin_register
class AuthorModelAdmin(TreeModelAdmin):
    menu_label = 'Library'
    menu_icon = 'list-ul'
    model = Author
    child_field = 'book_set'
    child_model_admin = BookModelAdmin

Then visit the Wagtail admin. Library will be in the menu, and will give you a list of authors, and each author will have a link that will take you to their books.

Wagtail-TreeModelAdmin uses three new attributes on ModelAdmin subclasses to express parent/child relationships:

• parent_field: The name of the Django ForeignKey on a child model.
• child_field: The related_name on a Django ForeignKey.
• child_model_admin

Any TreeModelAdmin subclass can specify both parent and child relationships. The root of the tree (either the TreeModelAdmin included in a ModelAdminGroup or the @modeladmin_registered TreeModelAdmin subclass) should only include child_* fields.

Please add issues to the issue tracker.

General instructions on how to contribute can be found in CONTRIBUTING.

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1. Forked from cfgov-refresh