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from functools import update_wrapper
from django.apps import apps
from django.conf import settings
from django.contrib.admin import ModelAdmin, actions
from django.contrib.auth import REDIRECT_FIELD_NAME
from django.core.exceptions import ImproperlyConfigured, PermissionDenied
from django.core.urlresolvers import NoReverseMatch, reverse
from django.db.models.base import ModelBase
from django.http import Http404, HttpResponseRedirect
from django.template.engine import Engine
from django.template.response import TemplateResponse
from django.utils import six
from django.utils.text import capfirst
from django.utils.translation import ugettext as _, ugettext_lazy
from django.views.decorators.cache import never_cache
from django.views.decorators.csrf import csrf_protect
system_check_errors = []
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.
"""
# Text to put at the end of each page's <title>.
site_title = ugettext_lazy('Django site admin')
# Text to put in each page's <h1>.
site_header = ugettext_lazy('Django administration')
# Text to put at the top of the admin index page.
index_title = ugettext_lazy('Site administration')
# URL for the "View site" link at the top of each admin page.
site_url = '/'
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'):
self._registry = {} # model_class class -> admin_class instance
self.name = 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
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__)
# Ignore the registration if the model has been
# swapped out.
if not model._meta.swapped:
# 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)
if admin_class is not ModelAdmin and settings.DEBUG:
system_check_errors.extend(admin_class.check(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 is_registered(self, model):
"""
Check if a model class is registered with this `AdminSite`.
"""
return model in self._registry
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):
"""
Explicitly get a registered global action whether 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 six.iteritems(self._actions)
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 admin and contenttypes apps are
installed, as well as the auth context processor.
"""
if not apps.is_installed('django.contrib.admin'):
raise ImproperlyConfigured(
"Put 'django.contrib.admin' in your INSTALLED_APPS "
"setting in order to use the admin application.")
if not apps.is_installed('django.contrib.contenttypes'):
raise ImproperlyConfigured(
"Put 'django.contrib.contenttypes' in your INSTALLED_APPS "
"setting in order to use the admin application.")
try:
default_template_engine = Engine.get_default()
except Exception:
# Skip this non-critical check:
# 1. if the user has a non-trivial TEMPLATES setting and Django
# can't find a default template engine
# 2. if anything goes wrong while loading template engines, in
# order to avoid raising an exception from a confusing location
# Catching ImproperlyConfigured suffices for 1. but 2. requires
# catching all exceptions.
pass
else:
if ('django.contrib.auth.context_processors.auth'
not in default_template_engine.context_processors):
raise ImproperlyConfigured(
"Enable 'django.contrib.auth.context_processors.auth' "
"in your TEMPLATES 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 url
urls = super(MyAdminSite, self).get_urls()
urls += [
url(r'^my_view/$', self.admin_view(some_view))
]
return urls
By default, admin_views are marked non-cacheable using the
``never_cache`` decorator. If the view can be safely cached, set
cacheable=True.
"""
def inner(request, *args, **kwargs):
if not self.has_permission(request):
if request.path == reverse('admin:logout', current_app=self.name):
index_path = reverse('admin:index', current_app=self.name)
return HttpResponseRedirect(index_path)
# Inner import to prevent django.contrib.admin (app) from
# importing django.contrib.auth.models.User (unrelated model).
from django.contrib.auth.views import redirect_to_login
return redirect_to_login(
request.get_full_path(),
reverse('admin:login', current_app=self.name)
)
return view(request, *args, **kwargs)
if not cacheable:
inner = never_cache(inner)
# We add csrf_protect here so this function can be used as a utility
# function for any view, without having to repeat 'csrf_protect'.
if not getattr(view, 'csrf_exempt', False):
inner = csrf_protect(inner)
return update_wrapper(inner, view)
def get_urls(self):
from django.conf.urls import url, include
# Since this module gets imported in the application's root package,
# it cannot import models from other applications at the module level,
# and django.contrib.contenttypes.views imports ContentType.
from django.contrib.contenttypes import views as contenttype_views
if settings.DEBUG:
self.check_dependencies()
def wrap(view, cacheable=False):
def wrapper(*args, **kwargs):
return self.admin_view(view, cacheable)(*args, **kwargs)
wrapper.admin_site = self
return update_wrapper(wrapper, view)
# Admin-site-wide views.
urlpatterns = [
url(r'^$', wrap(self.index), name='index'),
url(r'^login/$', self.login, name='login'),
url(r'^logout/$', 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),
name='view_on_site'),
]
# Add in each model's views, and create a list of valid URLS for the
# app_index
valid_app_labels = []
for model, model_admin in self._registry.items():
urlpatterns += [
url(r'^%s/%s/' % (model._meta.app_label, model._meta.model_name), include(model_admin.urls)),
]
if model._meta.app_label not in valid_app_labels:
valid_app_labels.append(model._meta.app_label)
# If there were ModelAdmins registered, we should have a list of app
# labels for which we need to allow access to the app_index view,
if valid_app_labels:
regex = r'^(?P<app_label>' + '|'.join(valid_app_labels) + ')/$'
urlpatterns += [
url(regex, wrap(self.app_index), name='app_list'),
]
return urlpatterns
@property
def urls(self):
return self.get_urls(), 'admin', self.name
def each_context(self, request):
"""
Returns a dictionary of variables to put in the template context for
*every* page in the admin site.
"""
return {
'site_title': self.site_title,
'site_header': self.site_header,
'site_url': self.site_url,
'has_permission': self.has_permission(request),
'available_apps': self.get_app_list(request),
}
def password_change(self, request, extra_context=None):
"""
Handles the "change password" task -- both form display and validation.
"""
from django.contrib.admin.forms import AdminPasswordChangeForm
from django.contrib.auth.views import password_change
url = reverse('admin:password_change_done', current_app=self.name)
defaults = {
'current_app': self.name,
'password_change_form': AdminPasswordChangeForm,
'post_change_redirect': url,
'extra_context': dict(self.each_context(request), **(extra_context or {})),
}
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': dict(self.each_context(request), **(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': dict(self.each_context(request), **(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.
"""
if request.method == 'GET' and self.has_permission(request):
# Already logged-in, redirect to admin index
index_path = reverse('admin:index', current_app=self.name)
return HttpResponseRedirect(index_path)
from django.contrib.auth.views import login
# Since this module gets imported in the application's root package,
# it cannot import models from other applications at the module level,
# and django.contrib.admin.forms eventually imports User.
from django.contrib.admin.forms import AdminAuthenticationForm
context = dict(self.each_context(request),
title=_('Log in'),
app_path=request.get_full_path(),
)
if (REDIRECT_FIELD_NAME not in request.GET and
REDIRECT_FIELD_NAME not in request.POST):
context[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)
def _build_app_dict(self, request, label=None):
"""
Builds the app dictionary. Takes an optional label parameters to filter
models of a specific app.
"""
app_dict = {}
if label:
models = {
m: m_a for m, m_a in self._registry.items()
if m._meta.app_label == label
}
else:
models = self._registry
for model, model_admin in models.items():
app_label = model._meta.app_label
has_module_perms = model_admin.has_module_permission(request)
if not has_module_perms:
if label:
raise PermissionDenied
continue
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 not in perms.values():
continue
info = (app_label, model._meta.model_name)
model_dict = {
'name': capfirst(model._meta.verbose_name_plural),
'object_name': model._meta.object_name,
'perms': perms,
}
if perms.get('change'):
try:
model_dict['admin_url'] = reverse('admin:%s_%s_changelist' % info, current_app=self.name)
except NoReverseMatch:
pass
if perms.get('add'):
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': apps.get_app_config(app_label).verbose_name,
'app_label': app_label,
'app_url': reverse(
'admin:app_list',
kwargs={'app_label': app_label},
current_app=self.name,
),
'has_module_perms': has_module_perms,
'models': [model_dict],
}
if label:
return app_dict.get(label)
return app_dict
def get_app_list(self, request):
"""
Returns a sorted list of all the installed apps that have been
registered in this site.
"""
app_dict = self._build_app_dict(request)
# Sort the apps alphabetically.
app_list = sorted(app_dict.values(), key=lambda x: x['name'].lower())
# Sort the models alphabetically within each app.
for app in app_list:
app['models'].sort(key=lambda x: x['name'])
return app_list
@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_list = self.get_app_list(request)
context = dict(
self.each_context(request),
title=self.index_title,
app_list=app_list,
)
context.update(extra_context or {})
request.current_app = self.name
return TemplateResponse(request, self.index_template or
'admin/index.html', context)
def app_index(self, request, app_label, extra_context=None):
app_dict = self._build_app_dict(request, app_label)
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'])
app_name = apps.get_app_config(app_label).verbose_name
context = dict(self.each_context(request),
title=_('%(app)s administration') % {'app': app_name},
app_list=[app_dict],
app_label=app_label,
)
context.update(extra_context or {})
request.current_app = self.name
return TemplateResponse(request, self.app_index_template or [
'admin/%s/app_index.html' % app_label,
'admin/app_index.html'
], context)
# 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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