def load_related_m2m(object_list, field):
select_fields = ['pk']
#related_field = object_list.model._meta.get_field(field)
if not object_list:
return
model = object_list[0].__class__
related_field = model._meta.get_field(field)
related_model = related_field.rel.to
cache_name = 'all_%s' % field
for f in related_model._meta.local_fields:
select_fields.append('%s%s%s' % (field, LOOKUP_SEP, f.column))
query = sql.Query(model)
query.add_fields(select_fields)
query.add_filter(('pk__in', [obj.pk for obj in object_list]))
related_dict = {}
cursor = connection.cursor()
cursor.execute(query.__str__())
for row in cursor.fetchall():
if row[2]:
related_dict.setdefault(row[0], []).append(related_model(*row[1:]))
for obj in object_list:
try:
setattr(obj, cache_name, related_dict[obj.pk])
except KeyError:
setattr(obj, cache_name, [])
return object_list
def load_related_m2m(object_list, field):
select_fields = ['pk']
related_field = object_list.models.get_field(field)
related_model = related_field.rel.to
cache_name = 'all_%s' % field
for f in related_model._meta.local_fields:
select_fields.append('%s%s%s' % (field, LOOKUP_SEP, f.column))
query = sql.Query(object_list.model, connection)
query.add_fields(select_fields)
query.add_filter(('pk__in', [obj.pk for obj in object_list]))
related_dict = {}
for row in query.results_iter():
if row[2]:
related_dict.setdefault(row[0], []).append(related_model(*row[1:]))
for obj in object_list:
try:
setattr(obj, cache_name, related_dict[obj.pk])
except KeyError:
setattr(obj, cache_name, [])
return object_list
def __init__(self, model=None, query=None, using=None):
self.model = model
# EmptyQuerySet instantiates QuerySet with model as None
self._db = using
self.query = query or sql.Query(self.model)
self._result_cache = None
self._iter = None
self._sticky_filter = False
def __init__(self, model=None, query=None, using=None, hints=None):
self.model = model
self._db = using
self._hints = hints or {}
self.query = query or sql.Query(self.model)
self._result_cache = None
self._sticky_filter = False
self._for_write = False
self._prefetch_related_lookups = ()
self._prefetch_done = False
self._known_related_objects = {} # {rel_field: {pk: rel_obj}}
self._iterable_class = ModelIterable
self._fields = None
def __init__(self,
model=None,
db_list=None,
multidbquerysets=None,
filter_args=(),
filter_kwargs={},
**kwargs):
self.model = model
self._db_list = db_list
self.multidbquerysets = []
self.query = sql.Query(self.model)
self.__multidbquerysets = multidbquerysets
self.index = 0
self.filter_args = filter_args
self.filter_kwargs = filter_kwargs
self._set_multidbquerysets()
def __init__(self, *args, **kwargs):
self.kwargs = kwargs
self._set_querysets(args)
self.model = args[0].model
self.query = args[0].query or sql.Query(self.model)
self.verbose_name = args[0].model._meta.verbose_name
self.verbose_name_plural = args[0].model._meta.verbose_name_plural
# Some information necessary for properly iterating through a QuerySet.
self._order_by = []
self._standard_ordering = True
self._low_mark, self._high_mark = 0, None
self._prefetch_related_lookups = () # not completed
self._iterable_class = QuerySequenceIterable
self._result_cache = None
def __init__(self, model=None, query=None):
self.model = model
self.query = query or sql.Query(self.model, connection)
self._result_cache = None
self._iter = None
self._sticky_filter = False