Adds to Melange a tags framework based on taggable-mixin.
The taggable-mixin allowed only tag per Datastore model. This is extended
framework allows any arbitrary number of tags per Datastore model. Also,
now one can define different models for different Tag types which are all
inherited from the base Tag model provided by taggable-mixin.
The GHOPTask model makes use of 2 tags per model, one for difficulty and the
other for task_type, both using the tags framework.
Reviewed by: Paweł Sołyga
class BoundRelatedObject(object):
def __init__(self, related_object, field_mapping, original):
self.relation = related_object
self.field_mappings = field_mapping[related_object.name]
def template_name(self):
raise NotImplementedError
def __repr__(self):
return repr(self.__dict__)
class RelatedObject(object):
def __init__(self, parent_model, model, field):
self.parent_model = parent_model
self.model = model
self.opts = model._meta
self.field = field
self.name = '%s:%s' % (self.opts.app_label, self.opts.module_name)
self.var_name = self.opts.object_name.lower()
def get_db_prep_lookup(self, lookup_type, value):
# Defer to the actual field definition for db prep
return self.field.get_db_prep_lookup(lookup_type, value)
def editable_fields(self):
"Get the fields in this class that should be edited inline."
return [f for f in self.opts.fields + self.opts.many_to_many if f.editable and f != self.field]
def __repr__(self):
return "<RelatedObject: %s related to %s>" % (self.name, self.field.name)
def bind(self, field_mapping, original, bound_related_object_class=BoundRelatedObject):
return bound_related_object_class(self, field_mapping, original)
def get_accessor_name(self):
# This method encapsulates the logic that decides what name to give an
# accessor descriptor that retrieves related many-to-one or
# many-to-many objects. It uses the lower-cased object_name + "_set",
# but this can be overridden with the "related_name" option.
if self.field.rel.multiple:
# If this is a symmetrical m2m relation on self, there is no reverse accessor.
if getattr(self.field.rel, 'symmetrical', False) and self.model == self.parent_model:
return None
return self.field.rel.related_name or (self.opts.object_name.lower() + '_set')
else:
return self.field.rel.related_name or (self.opts.object_name.lower())