Django shortcut functionsLink to this heading

The package django.shortcuts collects helper functions and classes that "span" multiple levels of MVC. In other words, these functions/classes introduce controlled coupling for convenience's sake.

``render () ``Link to this heading

render(request, template_name, context=None, content_type=None, status=None, using=None)Link to this definition

Combines a given template with a given context dictionary and returns an HttpResponse object with that rendered text.

Django does not provide a shortcut function which returns a TemplateResponse because the constructor of TemplateResponse offers the same level of convenience as render().

Required argumentsLink to this heading

Iarrata

The request object used to generate this response.

ainmne_teimpléad

The full name of a template to use or sequence of template names. If a sequence is given, the first template that exists will be used. See the template loading documentation for more information on how templates are found.

Optional argumentsLink to this heading

comhthéacs

A dictionary of values to add to the template context. By default, this is an empty dictionary. If a value in the dictionary is callable, the view will call it just before rendering the template.

``cineál_ábhar ``

The MIME type to use for the resulting document. Defaults to 'text/html'.

stádas

The status code for the response. Defaults to 200.

`Úsáid

An: Socrú: `AINM <TEMPLATES-NAME>`inneall teimpléad le húsáid chun an teimpléad a luchtú.

SamplaLink to this heading

The following example renders the template myapp/index.html with the MIME type application/xhtml+xml:

Code
from django.shortcuts import render


def my_view(request):
    # View code here...
    return render(
        request,
        "myapp/index.html",
        {
            "foo": "bar",
        },
        content_type="application/xhtml+xml",
    )

This example is equivalent to:

Code
from django.http import HttpResponse
from django.template import loader


def my_view(request):
    # View code here...
    t = loader.get_template("myapp/index.html")
    c = {"foo": "bar"}
    return HttpResponse(t.render(c, request), content_type="application/xhtml+xml")

redirect()Link to this heading

redirect(to, *args, permanent=False, preserve_request=False, **kwargs)Link to this definition

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, a temporary redirect is issued with a 302 status code. If permanent=True, a permanent redirect is issued with a 301 status code.

If preserve_request=True, the response instructs the user agent to preserve the method and body of the original request when issuing the redirect. In this case, temporary redirects use a 307 status code, and permanent redirects use a 308 status code. This is better illustrated in the following table:

permanent

preserve_request

HTTP status code

Fíor

Bréag

301

Bréag

Bréag

302

Bréag

Fíor

307

Fíor

Fíor

308

SamplaíLink to this heading

You can use the redirect() function in a number of ways.

  1. By passing some object; that object's get_absolute_url() method will be called to figure out the redirect URL:

    Code
    from django.shortcuts import redirect
    
    
    def my_view(request):
        ...
        obj = MyModel.objects.get(...)
        return redirect(obj)
    
  2. By passing the name of a view and optionally some positional or keyword arguments; the URL will be reverse resolved using the reverse() method:

    Code
    def my_view(request):
        ...
        return redirect("some-view-name", foo="bar")
    
  3. By passing a hardcoded URL to redirect to:

    Code
    def my_view(request):
        ...
        return redirect("/some/url/")
    

    This also works with full URLs:

    Code
    def my_view(request):
        ...
        return redirect("https://example.com/")
    

By default, redirect() returns a temporary redirect. All of the above forms accept a permanent argument; if set to True a permanent redirect will be returned:

Code
def my_view(request):
    ...
    obj = MyModel.objects.get(...)
    return redirect(obj, permanent=True)

Additionally, the preserve_request argument can be used to preserve the original HTTP method:

Code
def my_view(request):
    # ...
    obj = MyModel.objects.get(...)
    if request.method in ("POST", "PUT"):
        # Redirection preserves the original request method.
        return redirect(obj, preserve_request=True)
    # ...

get_object_or_404()Link to this heading

get_object_or_404(klass, *args, **kwargs)Link to this definition
aget_object_or_404(klass, *args, **kwargs)Link to this definition

Asynchronous version: aget_object_or_404()

Calls get() on a given model manager, but it raises Http404 instead of the model's DoesNotExist exception.

ArgóintíLink to this heading

klass

A Model class, a Manager, or a QuerySet instance from which to get the object.

*args

Q objects.

**kwargs

Lookup parameters, which should be in the format accepted by get() and filter().

SamplaLink to this heading

The following example gets the object with the primary key of 1 from MyModel:

Code
from django.shortcuts import get_object_or_404


def my_view(request):
    obj = get_object_or_404(MyModel, pk=1)

This example is equivalent to:

Code
from django.http import Http404


def my_view(request):
    try:
        obj = MyModel.objects.get(pk=1)
    except MyModel.DoesNotExist:
        raise Http404("No MyModel matches the given query.")

The most common use case is to pass a Model, as shown above. However, you can also pass a QuerySet instance:

Code
queryset = Book.objects.filter(title__startswith="M")
get_object_or_404(queryset, pk=1)

The above example is a bit contrived since it's equivalent to doing:

Code
get_object_or_404(Book, title__startswith="M", pk=1)

but it can be useful if you are passed the queryset variable from somewhere else.

Finally, you can also use a Manager. This is useful for example if you have a custom manager:

Code
get_object_or_404(Book.dahl_objects, title="Matilda")

You can also use related managers:

Code
author = Author.objects.get(name="Roald Dahl")
get_object_or_404(author.book_set, title="Matilda")

Note: As with get(), a MultipleObjectsReturned exception will be raised if more than one object is found.

get_list_or_404()Link to this heading

get_list_or_404(klass, *args, **kwargs)Link to this definition
aget_list_or_404(klass, *args, **kwargs)Link to this definition

Asynchronous version: aget_list_or_404()

Returns the result of filter() on a given model manager cast to a list, raising Http404 if the resulting list is empty.

ArgóintíLink to this heading

klass

A Model, Manager or QuerySet instance from which to get the list.

*args

Q objects.

**kwargs

Lookup parameters, which should be in the format accepted by get() and filter().

SamplaLink to this heading

The following example gets all published objects from MyModel:

Code
from django.shortcuts import get_list_or_404


def my_view(request):
    my_objects = get_list_or_404(MyModel, published=True)

This example is equivalent to:

Code
from django.http import Http404


def my_view(request):
    my_objects = list(MyModel.objects.filter(published=True))
    if not my_objects:
        raise Http404("No MyModel matches the given query.")