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from functools import update_wrapper
from django.http import Http404, HttpResponseRedirect
from django.contrib.admin import ModelAdmin, actions
from django.contrib.admin.forms import AdminAuthenticationForm
from django.contrib.auth import REDIRECT_FIELD_NAME
from django.contrib.contenttypes import views as contenttype_views
from django.views.decorators.csrf import csrf_protect
from django.db.models.base import ModelBase
from django.core.exceptions import ImproperlyConfigured
from django.core.urlresolvers import reverse, NoReverseMatch
from django.template.response import TemplateResponse
from django.utils.safestring import mark_safe
from django.utils.text import capfirst
from django.utils.translation import ugettext as _
from django.views.decorators.cache import never_cache
from django.conf import settings
LOGIN_FORM_KEY = 'this_is_the_login_form'
class AlreadyRegistered(Exception):
pass
class NotRegistered(Exception):
pass
class AdminSite(object):
"""
An AdminSite object encapsulates an instance of the Django admin application, ready
to be hooked in to your URLconf. Models are registered with the AdminSite using the
register() method, and the get_urls() method can then be used to access Django view
functions that present a full admin interface for the collection of registered
models.
"""
login_form = None
index_template = None
app_index_template = None
login_template = None
logout_template = None
password_change_template = None
password_change_done_template = None
def __init__(self, name='admin', app_name='admin'):
self._registry = {} # model_class class -> admin_class instance
self.name = name
self.app_name = app_name
self._actions = {'delete_selected': actions.delete_selected}
self._global_actions = self._actions.copy()
def register(self, model_or_iterable, admin_class=None, **options):
"""
Registers the given model(s) with the given admin class.
The model(s) should be Model classes, not instances.
If an admin class isn't given, it will use ModelAdmin (the default
admin options). If keyword arguments are given -- e.g., list_display --
they'll be applied as options to the admin class.
If a model is already registered, this will raise AlreadyRegistered.
If a model is abstract, this will raise ImproperlyConfigured.
"""
if not admin_class:
admin_class = ModelAdmin
# Don't import the humongous validation code unless required
if admin_class and settings.DEBUG:
from django.contrib.admin.validation import validate
else:
validate = lambda model, adminclass: None
if isinstance(model_or_iterable, ModelBase):
model_or_iterable = [model_or_iterable]
for model in model_or_iterable:
if model._meta.abstract:
raise ImproperlyConfigured('The model %s is abstract, so it '
'cannot be registered with admin.' % model.__name__)
if model in self._registry:
raise AlreadyRegistered('The model %s is already registered' % model.__name__)
# If we got **options then dynamically construct a subclass of
# admin_class with those **options.
if options:
# For reasons I don't quite understand, without a __module__
# the created class appears to "live" in the wrong place,
# which causes issues later on.
options['__module__'] = __name__
admin_class = type("%sAdmin" % model.__name__, (admin_class,), options)
# Validate (which might be a no-op)
validate(admin_class, model)
# Instantiate the admin class to save in the registry
self._registry[model] = admin_class(model, self)
def unregister(self, model_or_iterable):
"""
Unregisters the given model(s).
If a model isn't already registered, this will raise NotRegistered.
"""
if isinstance(model_or_iterable, ModelBase):
model_or_iterable = [model_or_iterable]
for model in model_or_iterable:
if model not in self._registry:
raise NotRegistered('The model %s is not registered' % model.__name__)
del self._registry[model]
def add_action(self, action, name=None):
"""
Register an action to be available globally.
"""
name = name or action.__name__
self._actions[name] = action
self._global_actions[name] = action
def disable_action(self, name):
"""
Disable a globally-registered action. Raises KeyError for invalid names.
"""
del self._actions[name]
def get_action(self, name):
"""
Explicitally get a registered global action wheather it's enabled or
not. Raises KeyError for invalid names.
"""
return self._global_actions[name]
@property
def actions(self):
"""
Get all the enabled actions as an iterable of (name, func).
"""
return self._actions.iteritems()
def has_permission(self, request):
"""
Returns True if the given HttpRequest has permission to view
*at least one* page in the admin site.
"""
return request.user.is_active and request.user.is_staff
def check_dependencies(self):
"""
Check that all things needed to run the admin have been correctly installed.
The default implementation checks that LogEntry, ContentType and the
auth context processor are installed.
"""
from django.contrib.admin.models import LogEntry
from django.contrib.contenttypes.models import ContentType
if not LogEntry._meta.installed:
raise ImproperlyConfigured("Put 'django.contrib.admin' in your "
"INSTALLED_APPS setting in order to use the admin application.")
if not ContentType._meta.installed:
raise ImproperlyConfigured("Put 'django.contrib.contenttypes' in "
"your INSTALLED_APPS setting in order to use the admin application.")
if not ('django.contrib.auth.context_processors.auth' in settings.TEMPLATE_CONTEXT_PROCESSORS or
'django.core.context_processors.auth' in settings.TEMPLATE_CONTEXT_PROCESSORS):
raise ImproperlyConfigured("Put 'django.contrib.auth.context_processors.auth' "
"in your TEMPLATE_CONTEXT_PROCESSORS setting in order to use the admin application.")
def admin_view(self, view, cacheable=False):
"""
Decorator to create an admin view attached to this ``AdminSite``. This
wraps the view and provides permission checking by calling
``self.has_permission``.
You'll want to use this from within ``AdminSite.get_urls()``:
class MyAdminSite(AdminSite):
def get_urls(self):
from django.conf.urls import patterns, url
urls = super(MyAdminSite, self).get_urls()
urls += patterns('',
url(r'^my_view/$', self.admin_view(some_view))
)
return urls
By default, admin_views are marked non-cacheable using the
``never_cache`` decorator. If the view can be safely cached, set
cacheable=True.
"""
def inner(request, *args, **kwargs):
if not self.has_permission(request):
if request.path == reverse('admin:logout',
current_app=self.name):
index_path = reverse('admin:index', current_app=self.name)
return HttpResponseRedirect(index_path)
return self.login(request)
return view(request, *args, **kwargs)
if not cacheable:
inner = never_cache(inner)
# We add csrf_protect here so this function can be used as a utility
# function for any view, without having to repeat 'csrf_protect'.
if not getattr(view, 'csrf_exempt', False):
inner = csrf_protect(inner)
return update_wrapper(inner, view)
def get_urls(self):
from django.conf.urls import patterns, url, include
if settings.DEBUG:
self.check_dependencies()
def wrap(view, cacheable=False):
def wrapper(*args, **kwargs):
return self.admin_view(view, cacheable)(*args, **kwargs)
return update_wrapper(wrapper, view)
# Admin-site-wide views.
urlpatterns = patterns('',
url(r'^$',
wrap(self.index),
name='index'),
url(r'^logout/$',
wrap(self.logout),
name='logout'),
url(r'^password_change/$',
wrap(self.password_change, cacheable=True),
name='password_change'),
url(r'^password_change/done/$',
wrap(self.password_change_done, cacheable=True),
name='password_change_done'),
url(r'^jsi18n/$',
wrap(self.i18n_javascript, cacheable=True),
name='jsi18n'),
url(r'^r/(?P<content_type_id>\d+)/(?P<object_id>.+)/$',
wrap(contenttype_views.shortcut)),
url(r'^(?P<app_label>\w+)/$',
wrap(self.app_index),
name='app_list')
)
# Add in each model's views.
for model, model_admin in self._registry.iteritems():
urlpatterns += patterns('',
url(r'^%s/%s/' % (model._meta.app_label, model._meta.module_name),
include(model_admin.urls))
)
return urlpatterns
@property
def urls(self):
return self.get_urls(), self.app_name, self.name
def password_change(self, request):
"""
Handles the "change password" task -- both form display and validation.
"""
from django.contrib.auth.views import password_change
url = reverse('admin:password_change_done', current_app=self.name)
defaults = {
'current_app': self.name,
'post_change_redirect': url
}
if self.password_change_template is not None:
defaults['template_name'] = self.password_change_template
return password_change(request, **defaults)
def password_change_done(self, request, extra_context=None):
"""
Displays the "success" page after a password change.
"""
from django.contrib.auth.views import password_change_done
defaults = {
'current_app': self.name,
'extra_context': extra_context or {},
}
if self.password_change_done_template is not None:
defaults['template_name'] = self.password_change_done_template
return password_change_done(request, **defaults)
def i18n_javascript(self, request):
"""
Displays the i18n JavaScript that the Django admin requires.
This takes into account the USE_I18N setting. If it's set to False, the
generated JavaScript will be leaner and faster.
"""
if settings.USE_I18N:
from django.views.i18n import javascript_catalog
else:
from django.views.i18n import null_javascript_catalog as javascript_catalog
return javascript_catalog(request, packages=['django.conf', 'django.contrib.admin'])
@never_cache
def logout(self, request, extra_context=None):
"""
Logs out the user for the given HttpRequest.
This should *not* assume the user is already logged in.
"""
from django.contrib.auth.views import logout
defaults = {
'current_app': self.name,
'extra_context': extra_context or {},
}
if self.logout_template is not None:
defaults['template_name'] = self.logout_template
return logout(request, **defaults)
@never_cache
def login(self, request, extra_context=None):
"""
Displays the login form for the given HttpRequest.
"""
from django.contrib.auth.views import login
context = {
'title': _('Log in'),
'app_path': request.get_full_path(),
REDIRECT_FIELD_NAME: request.get_full_path(),
}
context.update(extra_context or {})
defaults = {
'extra_context': context,
'current_app': self.name,
'authentication_form': self.login_form or AdminAuthenticationForm,
'template_name': self.login_template or 'admin/login.html',
}
return login(request, **defaults)
@never_cache
def index(self, request, extra_context=None):
"""
Displays the main admin index page, which lists all of the installed
apps that have been registered in this site.
"""
app_dict = {}
user = request.user
for model, model_admin in self._registry.items():
app_label = model._meta.app_label
has_module_perms = user.has_module_perms(app_label)
if has_module_perms:
perms = model_admin.get_model_perms(request)
# Check whether user has any perm for this module.
# If so, add the module to the model_list.
if True in perms.values():
info = (app_label, model._meta.module_name)
model_dict = {
'name': capfirst(model._meta.verbose_name_plural),
'perms': perms,
}
if perms.get('change', False):
try:
model_dict['admin_url'] = reverse('admin:%s_%s_changelist' % info, current_app=self.name)
except NoReverseMatch:
pass
if perms.get('add', False):
try:
model_dict['add_url'] = reverse('admin:%s_%s_add' % info, current_app=self.name)
except NoReverseMatch:
pass
if app_label in app_dict:
app_dict[app_label]['models'].append(model_dict)
else:
app_dict[app_label] = {
'name': app_label.title(),
'app_url': reverse('admin:app_list', kwargs={'app_label': app_label}, current_app=self.name),
'has_module_perms': has_module_perms,
'models': [model_dict],
}
# Sort the apps alphabetically.
app_list = app_dict.values()
app_list.sort(key=lambda x: x['name'])
# Sort the models alphabetically within each app.
for app in app_list:
app['models'].sort(key=lambda x: x['name'])
context = {
'title': _('Site administration'),
'app_list': app_list,
}
context.update(extra_context or {})
return TemplateResponse(request, [
self.index_template or 'admin/index.html',
], context, current_app=self.name)
def app_index(self, request, app_label, extra_context=None):
user = request.user
has_module_perms = user.has_module_perms(app_label)
app_dict = {}
for model, model_admin in self._registry.items():
if app_label == model._meta.app_label:
if has_module_perms:
perms = model_admin.get_model_perms(request)
# Check whether user has any perm for this module.
# If so, add the module to the model_list.
if True in perms.values():
info = (app_label, model._meta.module_name)
model_dict = {
'name': capfirst(model._meta.verbose_name_plural),
'perms': perms,
}
if perms.get('change', False):
try:
model_dict['admin_url'] = reverse('admin:%s_%s_changelist' % info, current_app=self.name)
except NoReverseMatch:
pass
if perms.get('add', False):
try:
model_dict['add_url'] = reverse('admin:%s_%s_add' % info, current_app=self.name)
except NoReverseMatch:
pass
if app_dict:
app_dict['models'].append(model_dict),
else:
# First time around, now that we know there's
# something to display, add in the necessary meta
# information.
app_dict = {
'name': app_label.title(),
'app_url': '',
'has_module_perms': has_module_perms,
'models': [model_dict],
}
if not app_dict:
raise Http404('The requested admin page does not exist.')
# Sort the models alphabetically within each app.
app_dict['models'].sort(key=lambda x: x['name'])
context = {
'title': _('%s administration') % capfirst(app_label),
'app_list': [app_dict],
}
context.update(extra_context or {})
return TemplateResponse(request, self.app_index_template or [
'admin/%s/app_index.html' % app_label,
'admin/app_index.html'
], context, current_app=self.name)
# This global object represents the default admin site, for the common case.
# You can instantiate AdminSite in your own code to create a custom admin site.
site = AdminSite()
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