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django/django/contrib/admin/decorators.py at main · django/django · GitHub

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def action(function=None, *, permissions=None, description=None):

"""

Conveniently add attributes to an action function::

@admin.action(

permissions=['publish'],

description='Mark selected stories as published',

)

def make_published(self, request, queryset):

queryset.update(status='p')

This is equivalent to setting some attributes (with the original, longer

names) on the function directly::

def make_published(self, request, queryset):

queryset.update(status='p')

make_published.allowed_permissions = ['publish']

make_published.short_description = 'Mark selected stories as published'

"""

def decorator(func):

if permissions is not None:

func.allowed_permissions = permissions

if description is not None:

func.short_description = description

return func

if function is None:

return decorator

else:

return decorator(function)

def display(

function=None, *, boolean=None, ordering=None, description=None, empty_value=None

"""

Conveniently add attributes to a display function::

@admin.display(

boolean=True,

ordering='-publish_date',

description='Is Published?',

)

def is_published(self, obj):

return obj.publish_date is not None

This is equivalent to setting some attributes (with the original, longer

names) on the function directly::

def is_published(self, obj):

return obj.publish_date is not None

is_published.boolean = True

is_published.admin_order_field = '-publish_date'

is_published.short_description = 'Is Published?'

"""

def decorator(func):

if boolean is not None and empty_value is not None:

raise ValueError(

"The boolean and empty_value arguments to the @display "

"decorator are mutually exclusive."

)

if boolean is not None:

func.boolean = boolean

if ordering is not None:

func.admin_order_field = ordering

if description is not None:

func.short_description = description

if empty_value is not None:

func.empty_value_display = empty_value

return func

if function is None:

return decorator

else:

return decorator(function)

def register(*models, site=None):

"""

admin site:

@register(Author)

class AuthorAdmin(admin.ModelAdmin):

pass

The `site` kwarg is an admin site to use instead of the default admin site.

"""

from django.contrib.admin import ModelAdmin

from django.contrib.admin.sites import AdminSite

from django.contrib.admin.sites import site as default_site

def _model_admin_wrapper(admin_class):

if not models:

raise ValueError("At least one model must be passed to register.")

admin_site = site or default_site

if not isinstance(admin_site, AdminSite):

raise ValueError("site must subclass AdminSite")

if not issubclass(admin_class, ModelAdmin):

raise ValueError("Wrapped class must subclass ModelAdmin.")

admin_site.register(models, admin_class=admin_class)

return admin_class

return _model_admin_wrapper

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