def delete_batch(obj, pk_list, using, field=None):
opts=obj.model._meta
if not field:
field = opts.pk
# original batch delete iof not composite
if not getattr(field, "is_composite_primarykeys_field", False):
return original_delete_batch(obj, pk_list, using, field=field)
# composite PK fields
field_keys = field.fields
for offset in range(0, len(pk_list), GET_ITERATOR_CHUNK_SIZE):
where = obj.where_class()
off_list = pk_list[offset : offset + GET_ITERATOR_CHUNK_SIZE]
# delete where in using concatenate features
values = [disassemble_pk(value, len(field_keys)) for value in off_list]
values = [[field.get_prep_value(part) for field, part in zip(field_keys, value)] for value in values]
where.add(MultipleColumnsIN([f.column for f in field_keys], values), AND)
obj.do_query(obj.model._meta.db_table, where, using=using)
def natural_key(self):
return disassemble_pk(
self.pk,
len(self._meta.composite_primarykeys_field.fields))
def natural_key(self):
return disassemble_pk(self.pk, len(self._meta.composite_primarykeys_field.fields))