LogEntry.change_message The detailed description of the modification. In the case of an edit, for example, the message contains a list of the edited fields. The Django admin site formats this content as a JSON structure, so that get_change_message() can recompose a message translated in the current user language. Custom code might set this as a plain string though. You are advised to use the get_change_message() method to retrieve this value instead of accessing it directly. Changed in Djan

class requests.RequestSite A class that shares the primary interface of Site (i.e., it has domain and name attributes) but gets its data from a Django HttpRequest object rather than from a database. __init__(request) Sets the name and domain attributes to the value of get_host(). A RequestSite object has a similar interface to a normal Site object, except its __init__() method takes an HttpRequest object. It’s able to deduce the domain and name by looking at the request’s domain. It ha

class Func(*expressions, **extra) [source] function A class attribute describing the function that will be generated. Specifically, the function will be interpolated as the function placeholder within template. Defaults to None. template A class attribute, as a format string, that describes the SQL that is generated for this function. Defaults to '%(function)s(%(expressions)s)'. If you’re constructing SQL like strftime('%W', 'date') and need a literal % character in the query, quadr

raw(raw_query, params=None, translations=None) Takes a raw SQL query, executes it, and returns a django.db.models.query.RawQuerySet instance. This RawQuerySet instance can be iterated over just like an normal QuerySet to provide object instances. See the Performing raw SQL queries for more information. Warning raw() always triggers a new query and doesn’t account for previous filtering. As such, it should generally be called from the Manager or from a fresh QuerySet instance.

delete() Performs an SQL delete query on all rows in the QuerySet and returns the number of objects deleted and a dictionary with the number of deletions per object type. The delete() is applied instantly. You cannot call delete() on a QuerySet that has had a slice taken or can otherwise no longer be filtered. For example, to delete all the entries in a particular blog: >>> b = Blog.objects.get(pk=1) # Delete all the entries belonging to this Blog. >>> Entry.objects.filter

decorator_from_middleware(middleware_class) [source] Given a middleware class, returns a view decorator. This lets you use middleware functionality on a per-view basis. The middleware is created with no params passed. It assumes middleware that’s compatible with the old style of Django 1.9 and earlier (having methods like process_request(), process_exception(), and process_response()).

Engine.select_template(self, template_name_list) [source] Like get_template(), except it takes a list of names and returns the first template that was found.

ModelAdmin.get_queryset(request) The get_queryset method on a ModelAdmin returns a QuerySet of all model instances that can be edited by the admin site. One use case for overriding this method is to show objects owned by the logged-in user: class MyModelAdmin(admin.ModelAdmin): def get_queryset(self, request): qs = super(MyModelAdmin, self).get_queryset(request) if request.user.is_superuser: return qs return qs.filter(author=request.user)

redirect(to, permanent=False, *args, **kwargs) [source] Returns an HttpResponseRedirect to the appropriate URL for the arguments passed. The arguments could be: A model: the model’s get_absolute_url() function will be called. A view name, possibly with arguments: reverse() will be used to reverse-resolve the name. An absolute or relative URL, which will be used as-is for the redirect location. By default issues a temporary redirect; pass permanent=True to issue a permanent redirect.

permission_required(perm, login_url=None, raise_exception=False) [source] It’s a relatively common task to check whether a user has a particular permission. For that reason, Django provides a shortcut for that case: the permission_required() decorator.: from django.contrib.auth.decorators import permission_required @permission_required('polls.can_vote') def my_view(request): ... Just like the has_perm() method, permission names take the form "<app label>.<permission codename&g