apps.is_installed(app_name) Checks whether an application with the given name exists in the registry. app_name

class Avg(expression, output_field=FloatField(), **extra) [source] Returns the mean value

FieldFile.name The name of the file including the relative path from the root of the

relabeled_clone(change_map) Returns a clone (copy) of self, with any column aliases relabeled. Column aliases are

get_template_sources(template_name) [source] A method that takes a template_name

prefetch_related_objects(model_instances, *related_lookups) [source]

CASCADE [source] Cascade deletes. Django emulates the behavior of the SQL constraint ON DELETE

GEOSGeometry.touches(other) Returns True if the DE-9IM intersection matrix for the two geometries is FT*******

class validators.UnicodeUsernameValidator New in Django 1.10.

groups Many-to-many relationship to Group