Admin classes

mptt.admin.MPTTModelAdmin

This is a bare-bones tree admin. All it does is enforce ordering, and indent the nodes in the tree to make a pretty tree list view.

MPTTModelAdmin screenshot

Usage:

from django.contrib import admin
from mptt.admin import MPTTModelAdmin
from myproject.myapp.models import Node

admin.site.register(Node, MPTTModelAdmin)

You can change the indent pixels per level globally by putting this in your settings.py:

# default is 10 pixels
MPTT_ADMIN_LEVEL_INDENT = 20

If you’d like to specify the pixel amount per Model, define an mptt_level_indent attribute in your MPTTModelAdmin:

from django.contrib import admin
from mptt.admin import MPTTModelAdmin
from myproject.myapp.models import Node

class CustomMPTTModelAdmin(MPTTModelAdmin):
    # specify pixel amount for this ModelAdmin only:
    mptt_level_indent = 20

admin.site.register(Node, CustomMPTTModelAdmin)

If you’d like to specify which field should be indented, add an mptt_indent_field to your MPTTModelAdmin:

# …
class CustomMPTTModelAdmin(MPTTModelAdmin):
    mptt_indent_field = "some_node_field"
# …

mptt.admin.DraggableMPTTAdmin

New in version 0.8.1.

DraggableMPTTAdmin screenshot

This is a tree admin based on FeinCMS offering drag-drop functionality for moving nodes:

from django.contrib import admin
from mptt.admin import DraggableMPTTAdmin
from myproject.myapp.models import Node

admin.site.register(
    Node,
    DraggableMPTTAdmin,
    list_display=(
        'tree_actions',
        'indented_title',
        # ...more fields if you feel like it...
    ),
    list_display_links=(
        'indented_title',
    ),
)

Note

Supported browsers include all recent versions of Firefox, Chrome, Safari and Internet Explorer (9 or better).

Warning

Does not work well with big trees (more than a few hundred nodes, or trees deeper than 10 levels). Patches implementing lazy-loading of deep trees are very much appreciated.

It is recommended that tree_actions is the first value passed to list_display; this also requires you to specify list_display_links because tree_actions cannot be used as the object link field.

indented_title does nothing but return the indented self-description of nodes, 20px per level (or the value of mptt_level_indent, see below.)

list_per_page is set to 2000 by default (which effectively disables pagination for most trees).

Replacing indented_title

If you want to replace the indented_title method with your own, we recommend using the following code:

from django.utils.html import format_html

class MyDraggableMPTTAdmin(DraggableMPTTAdmin):
    list_display = ('tree_actions', 'something')
    list_display_links = ('something',)

    def something(self, instance):
        return format_html(
            '<div style="text-indent:{}px">{}</div>',
            instance._mpttfield('level') * self.mptt_level_indent,
            item.name,  # Or whatever you want to put here
        )
    something.short_description = _('something nice')

For changing the indentation per node, look below. Simply replacing indented_title is insufficient because the indentation also needs to be communicated to the JavaScript code.

Overriding admin templates per app or model

DraggableMPTTAdmin uses the stock admin changelist template with some CSS and JavaScript on top, so simply follow the official guide for overriding admin templates.

Changing the indentation of nodes

Simply set mptt_level_indent to a different pixel value (defaults to 20):

# ...
class MyDraggableMPTTAdmin(DraggableMPTTAdmin):
    mptt_level_indent = 50
# ...

mptt.admin.TreeRelatedFieldListFilter

Admin filter class which filters models related to parent model with all it’s descendants.

MPTTModelAdmin screenshot

Usage:

from mptt.admin import TreeRelatedFieldListFilter

@admin.register(models.MyModel)
class MyModelAdmin(admin.ModelAdmin):
    model = models.MyModel
    list_filter =
    (
        ('my_related_model', TreeRelatedFieldListFilter),
    )

Changing the indentation of list filter nodes

Simply set mptt_level_indent to a different pixel value (defaults to 10):

# ...
class MyTreeRelatedFieldListFilter(TreeRelatedFieldListFilter):
mptt_level_indent = 20
# ...