Viewing file:  decorators.py (3.35 KB) -rw-r--r--
Select action/file-type:
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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):
"""
Register the given model(s) classes and wrapped ModelAdmin class with
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, 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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