Source code for oscar.core.application

from django.urls import reverse_lazy

from oscar.core.loading import feature_hidden
from oscar.views.decorators import permissions_required


try:
    # Django 2
    from django.urls import URLPattern
except ImportError:
    # Django 1.11
    from django.urls.resolvers import RegexURLPattern as URLPattern


[docs]class Application(object): """ Base application class. This is subclassed by each app to provide a customisable container for an app's views and permissions. """ #: Application name name = None login_url = None #: A name that allows the functionality within this app to be disabled hidable_feature_name = None #: Maps view names to lists of permissions. We expect tuples of #: lists as dictionary values. A list is a set of permissions that all #: needto be fulfilled (AND). Only one set of permissions has to be #: fulfilled (OR). #: If there's only one set of permissions, as a shortcut, you can also #: just define one list. permissions_map = {} #: Default permission for any view not in permissions_map default_permissions = None def __init__(self, app_name=None, **kwargs): """ kwargs: app_name: optionally specify the instance namespace """ self.app_name = app_name or self.name # Set all kwargs as object attributes for key, value in kwargs.items(): setattr(self, key, value)
[docs] def get_urls(self): """ Return the url patterns for this app. """ return []
[docs] def post_process_urls(self, urlpatterns): """ Customise URL patterns. This method allows decorators to be wrapped around an apps URL patterns. By default, this only allows custom decorators to be specified, but you could override this method to do anything you want. Args: urlpatterns (list): A list of URL patterns """ # Test if this the URLs in the Application instance should be # available. If the feature is hidden then we don't include the URLs. if feature_hidden(self.hidable_feature_name): return [] for pattern in urlpatterns: if hasattr(pattern, 'url_patterns'): self.post_process_urls(pattern.url_patterns) if isinstance(pattern, URLPattern): # Apply the custom view decorator (if any) set for this class if this # is a URL Pattern. decorator = self.get_url_decorator(pattern) if decorator: pattern.callback = decorator(pattern.callback) return urlpatterns
[docs] def get_permissions(self, url): """ Return a list of permissions for a given URL name Args: url (str): A URL name (eg ``basket.basket``) Returns: list: A list of permission strings. """ # url namespaced? if url is not None and ':' in url: view_name = url.split(':')[1] else: view_name = url return self.permissions_map.get(view_name, self.default_permissions)
[docs] def get_url_decorator(self, pattern): """ Return the appropriate decorator for the view function with the passed URL name. Mainly used for access-protecting views. It's possible to specify: - no permissions necessary: use None - a set of permissions: use a list - two set of permissions (`or`): use a two-tuple of lists See permissions_required decorator for details """ permissions = self.get_permissions(pattern.name) if permissions: return permissions_required(permissions, login_url=self.login_url)
@property def urls(self): # We set the application and instance namespace here return self.get_urls(), self.name, self.app_name
[docs]class DashboardApplication(Application): login_url = reverse_lazy('dashboard:login')