def _create_joins(
self,
source_polymorphic=False,
source_selectable=None,
dest_polymorphic=False,
dest_selectable=None,
of_type=None,
):
key = util.WeakCompositeKey(source_polymorphic, source_selectable, dest_polymorphic, dest_selectable, of_type)
try:
return self.__join_cache[key]
except KeyError:
pass
if source_selectable is None:
if source_polymorphic and self.parent.with_polymorphic:
source_selectable = self.parent._with_polymorphic_selectable
aliased = False
if dest_selectable is None:
if dest_polymorphic and self.mapper.with_polymorphic:
dest_selectable = self.mapper._with_polymorphic_selectable
aliased = True
else:
dest_selectable = self.mapper.mapped_table
if self._is_self_referential() and source_selectable is None:
dest_selectable = dest_selectable.alias()
aliased = True
else:
aliased = True
aliased = aliased or bool(source_selectable)
primaryjoin, secondaryjoin, secondary = self.primaryjoin, self.secondaryjoin, self.secondary
# adjust the join condition for single table inheritance,
# in the case that the join is to a subclass
# this is analgous to the "_adjust_for_single_table_inheritance()"
# method in Query.
dest_mapper = of_type or self.mapper
single_crit = dest_mapper._single_table_criterion
if single_crit:
if secondaryjoin:
secondaryjoin = secondaryjoin & single_crit
else:
primaryjoin = primaryjoin & single_crit
if aliased:
if secondary:
secondary = secondary.alias()
primary_aliasizer = ClauseAdapter(secondary)
if dest_selectable:
secondary_aliasizer = ClauseAdapter(
dest_selectable, equivalents=self.mapper._equivalent_columns
).chain(primary_aliasizer)
else:
secondary_aliasizer = primary_aliasizer
if source_selectable:
primary_aliasizer = ClauseAdapter(secondary).chain(
ClauseAdapter(source_selectable, equivalents=self.parent._equivalent_columns)
)
secondaryjoin = secondary_aliasizer.traverse(secondaryjoin)
else:
if dest_selectable:
primary_aliasizer = ClauseAdapter(
dest_selectable, exclude=self.local_side, equivalents=self.mapper._equivalent_columns
)
if source_selectable:
primary_aliasizer.chain(
ClauseAdapter(
source_selectable, exclude=self.remote_side, equivalents=self.parent._equivalent_columns
)
)
elif source_selectable:
primary_aliasizer = ClauseAdapter(
source_selectable, exclude=self.remote_side, equivalents=self.parent._equivalent_columns
)
secondary_aliasizer = None
primaryjoin = primary_aliasizer.traverse(primaryjoin)
target_adapter = secondary_aliasizer or primary_aliasizer
target_adapter.include = target_adapter.exclude = None
else:
target_adapter = None
self.__join_cache[key] = ret = (
primaryjoin,
secondaryjoin,
(source_selectable or self.parent.local_table),
(dest_selectable or self.mapper.local_table),
secondary,
target_adapter,
)
return ret
def _create_joins(self, source_polymorphic=False, source_selectable=None, dest_polymorphic=False, dest_selectable=None, of_type=None):
if source_selectable is None:
if source_polymorphic and self.parent.with_polymorphic:
source_selectable = self.parent._with_polymorphic_selectable
aliased = False
if dest_selectable is None:
if dest_polymorphic and self.mapper.with_polymorphic:
dest_selectable = self.mapper._with_polymorphic_selectable
aliased = True
else:
dest_selectable = self.mapper.mapped_table
if self._is_self_referential() and source_selectable is None:
dest_selectable = dest_selectable.alias()
aliased = True
else:
aliased = True
aliased = aliased or bool(source_selectable)
primaryjoin, secondaryjoin, secondary = self.primaryjoin, self.secondaryjoin, self.secondary
# adjust the join condition for single table inheritance,
# in the case that the join is to a subclass
# this is analgous to the "_adjust_for_single_table_inheritance()"
# method in Query.
dest_mapper = of_type or self.mapper
single_crit = dest_mapper._single_table_criterion
if single_crit:
if secondaryjoin:
secondaryjoin = secondaryjoin & single_crit
else:
primaryjoin = primaryjoin & single_crit
if aliased:
if secondary:
secondary = secondary.alias()
primary_aliasizer = ClauseAdapter(secondary)
if dest_selectable:
secondary_aliasizer = ClauseAdapter(dest_selectable, equivalents=self.mapper._equivalent_columns).chain(primary_aliasizer)
else:
secondary_aliasizer = primary_aliasizer
if source_selectable:
primary_aliasizer = ClauseAdapter(secondary).chain(ClauseAdapter(source_selectable, equivalents=self.parent._equivalent_columns))
secondaryjoin = secondary_aliasizer.traverse(secondaryjoin)
else:
if dest_selectable:
primary_aliasizer = ClauseAdapter(dest_selectable, exclude=self.local_side, equivalents=self.mapper._equivalent_columns)
if source_selectable:
primary_aliasizer.chain(ClauseAdapter(source_selectable, exclude=self.remote_side, equivalents=self.parent._equivalent_columns))
elif source_selectable:
primary_aliasizer = ClauseAdapter(source_selectable, exclude=self.remote_side, equivalents=self.parent._equivalent_columns)
secondary_aliasizer = None
primaryjoin = primary_aliasizer.traverse(primaryjoin)
target_adapter = secondary_aliasizer or primary_aliasizer
target_adapter.include = target_adapter.exclude = None
else:
target_adapter = None
return (primaryjoin, secondaryjoin,
(source_selectable or self.parent.local_table),
(dest_selectable or self.mapper.local_table), secondary, target_adapter)
def _create_joins(self,
source_polymorphic=False,
source_selectable=None,
dest_polymorphic=False,
dest_selectable=None):
key = util.WeakCompositeKey(source_polymorphic, source_selectable,
dest_polymorphic, dest_selectable)
try:
return self.__join_cache[key]
except KeyError:
pass
if source_selectable is None:
if source_polymorphic and self.parent.with_polymorphic:
source_selectable = self.parent._with_polymorphic_selectable
aliased = False
if dest_selectable is None:
if dest_polymorphic and self.mapper.with_polymorphic:
dest_selectable = self.mapper._with_polymorphic_selectable
aliased = True
else:
dest_selectable = self.mapper.mapped_table
if self._is_self_referential() and source_selectable is None:
dest_selectable = dest_selectable.alias()
aliased = True
else:
aliased = True
aliased = aliased or bool(source_selectable)
primaryjoin, secondaryjoin, secondary = self.primaryjoin, self.secondaryjoin, self.secondary
# adjust the join condition for single table inheritance,
# in the case that the join is to a subclass
# this is analgous to the "_adjust_for_single_table_inheritance()"
# method in Query.
if self.mapper.single and self.mapper.inherits and self.mapper.polymorphic_on and self.mapper.polymorphic_identity is not None:
crit = self.mapper.polymorphic_on.in_(
m.polymorphic_identity
for m in self.mapper.polymorphic_iterator())
if secondaryjoin:
secondaryjoin = secondaryjoin & crit
else:
primaryjoin = primaryjoin & crit
if aliased:
if secondary:
secondary = secondary.alias()
primary_aliasizer = ClauseAdapter(secondary)
if dest_selectable:
secondary_aliasizer = ClauseAdapter(
dest_selectable,
equivalents=self.mapper._equivalent_columns).chain(
primary_aliasizer)
else:
secondary_aliasizer = primary_aliasizer
if source_selectable:
primary_aliasizer = ClauseAdapter(secondary).chain(
ClauseAdapter(
source_selectable,
equivalents=self.parent._equivalent_columns))
secondaryjoin = secondary_aliasizer.traverse(secondaryjoin)
else:
if dest_selectable:
primary_aliasizer = ClauseAdapter(
dest_selectable,
exclude=self.local_side,
equivalents=self.mapper._equivalent_columns)
if source_selectable:
primary_aliasizer.chain(
ClauseAdapter(
source_selectable,
exclude=self.remote_side,
equivalents=self.parent._equivalent_columns))
elif source_selectable:
primary_aliasizer = ClauseAdapter(
source_selectable,
exclude=self.remote_side,
equivalents=self.parent._equivalent_columns)
secondary_aliasizer = None
primaryjoin = primary_aliasizer.traverse(primaryjoin)
target_adapter = secondary_aliasizer or primary_aliasizer
target_adapter.include = target_adapter.exclude = None
else:
target_adapter = None
self.__join_cache[key] = ret = (primaryjoin, secondaryjoin,
(source_selectable
or self.parent.local_table),
(dest_selectable
or self.mapper.local_table),
secondary, target_adapter)
return ret