form_invalid() Renders a response, providing the invalid form as context.

flags The flags used when compiling the regular expression string regex. If regex is a pre-compiled regular expression, and flags is overridden, TypeError is raised. Defaults to 0.

paginate_orphans An integer specifying the number of “overflow” objects the last page can contain. This extends the paginate_by limit on the last page by up to paginate_orphans, in order to keep the last page from having a very small number of objects.

template_engine The NAME of a template engine to use for loading the template. template_engine is passed as the using keyword argument to response_class. Default is None, which tells Django to search for the template in all configured engines.

get_context_data(**kwargs) New in Django 1.9. Calls get_form() and adds the result to the context data with the name ‘form’.

class DefaultStorage [source] DefaultStorage provides lazy access to the current default storage system as defined by DEFAULT_FILE_STORAGE. DefaultStorage uses get_storage_class() internally.

BoundField.html_name The name that will be used in the widget’s HTML name attribute. It takes the form prefix into account.

Field.db_index If True, a database index will be created for this field.

cascaded_union Deprecated since version 1.10: Use the GEOSGeometry.unary_union property instead. Returns a Polygon that is the union of all of the component polygons in this collection. The algorithm employed is significantly more efficient (faster) than trying to union the geometries together individually. [2]

sym_difference() Returns the region consisting of the symmetric difference of this geometry and the other, as a new OGRGeometry object.