The following mixins are used to construct Django’s editing views:
Примечание
Examples of how these are combined into editing views can be found at the documentation on Generic editing views.
A mixin class that provides facilities for creating and displaying forms.
Mixins
Methods and Attributes
A dictionary containing initial data for the form.
The form class to instantiate.
The URL to redirect to when the form is successfully processed.
Retrieve the form class to instantiate. By default form_class.
Instantiate an instance of form_class using get_form_kwargs(). If form_class isn’t provided get_form_class() will be used.
The form_class argument is not required anymore.
Build the keyword arguments required to instantiate the form.
The initial argument is set to get_initial(). If the request is a POST or PUT, the request data (request.POST and request.FILES) will also be provided.
Determine the URL to redirect to when the form is successfully validated. Returns success_url by default.
Redirects to get_success_url().
Renders a response, providing the invalid form as context.
Calls get_form() and adds the result to the context data with the name ‘form’.
A form mixin that works on ModelForms, rather than a standalone form.
Since this is a subclass of SingleObjectMixin, instances of this mixin have access to the model and queryset attributes, describing the type of object that the ModelForm is manipulating.
If you specify both the fields and form_class attributes, an ImproperlyConfigured exception will be raised.
Previously if both fields and form_class were specified, fields was silently ignored.
Mixins
Methods and Attributes
A model class. Can be explicitly provided, otherwise will be determined by examining self.object or queryset.
A list of names of fields. This is interpreted the same way as the Meta.fields attribute of ModelForm.
This is a required attribute if you are generating the form class automatically (e.g. using model). Omitting this attribute will result in an ImproperlyConfigured exception.
Previously, omitting this attribute was allowed and resulted in a form with all fields of the model.
The URL to redirect to when the form is successfully processed.
success_url may contain dictionary string formatting, which will be interpolated against the object’s field attributes. For example, you could use success_url="/polls/{slug}/" to redirect to a URL composed out of the slug field on a model.
Support for the new brace-based Python formatting syntax has been added. The old %(slug)s placeholder syntax support has been deprecated and will be removed in Django 1.10.
Retrieve the form class to instantiate. If form_class is provided, that class will be used. Otherwise, a ModelForm will be instantiated using the model associated with the queryset, or with the model, depending on which attribute is provided.
Add the current instance (self.object) to the standard get_form_kwargs().
Determine the URL to redirect to when the form is successfully validated. Returns django.views.generic.edit.ModelFormMixin.success_url if it is provided; otherwise, attempts to use the get_absolute_url() of the object.
Saves the form instance, sets the current object for the view, and redirects to get_success_url().
Renders a response, providing the invalid form as context.
A mixin that provides basic HTTP GET and POST workflow.
Примечание
This is named ‘ProcessFormView’ and inherits directly from django.views.generic.base.View, but breaks if used independently, so it is more of a mixin.
Extends
Methods and Attributes
Renders a response using a context created with get_context_data().
Construction of the form was moved from this method to get_context_data().
Constructs a form, checks the form for validity, and handles it accordingly.
Enables handling of the DELETE http action.
Methods and Attributes
The url to redirect to when the nominated object has been successfully deleted.
success_url may contain dictionary string formatting, which will be interpolated against the object’s field attributes. For example, you could use success_url="/parent/{parent_id}/" to redirect to a URL composed out of the parent_id field on a model.
Support for the new brace-based Python formatting syntax has been added. The old %(slug)s placeholder syntax support has been deprecated and will be removed in Django 1.10.
Returns the url to redirect to when the nominated object has been successfully deleted. Returns success_url by default.
Mar 31, 2016