def _criterion_exists(self, criterion=None, **kwargs):
if getattr(self, "_of_type", None):
target_mapper = self._of_type
to_selectable = target_mapper._with_polymorphic_selectable
if self.prop._is_self_referential():
to_selectable = to_selectable.alias()
single_crit = target_mapper._single_table_criterion
if single_crit:
if criterion is not None:
criterion = single_crit & criterion
else:
criterion = single_crit
else:
to_selectable = None
if self.adapter:
source_selectable = self.__clause_element__()
else:
source_selectable = None
pj, sj, source, dest, secondary, target_adapter = self.prop._create_joins(
dest_polymorphic=True, dest_selectable=to_selectable, source_selectable=source_selectable
)
for k in kwargs:
crit = self.prop.mapper.class_manager[k] == kwargs[k]
if criterion is None:
criterion = crit
else:
criterion = criterion & crit
# annotate the *local* side of the join condition, in the case of pj + sj this
# is the full primaryjoin, in the case of just pj its the local side of
# the primaryjoin.
if sj:
j = _orm_annotate(pj) & sj
else:
j = _orm_annotate(pj, exclude=self.prop.remote_side)
if criterion and target_adapter:
# limit this adapter to annotated only?
criterion = target_adapter.traverse(criterion)
# only have the "joined left side" of what we return be subject to Query adaption. The right
# side of it is used for an exists() subquery and should not correlate or otherwise reach out
# to anything in the enclosing query.
if criterion:
criterion = criterion._annotate({"_halt_adapt": True})
crit = j & criterion
return sql.exists([1], crit, from_obj=dest).correlate(source)
def _criterion_exists(self, criterion=None, **kwargs):
if getattr(self, '_of_type', None):
target_mapper = self._of_type
to_selectable = target_mapper._with_polymorphic_selectable
if self.property._is_self_referential():
to_selectable = to_selectable.alias()
single_crit = target_mapper._single_table_criterion
if single_crit:
if criterion is not None:
criterion = single_crit & criterion
else:
criterion = single_crit
else:
to_selectable = None
if self.adapter:
source_selectable = self.__clause_element__()
else:
source_selectable = None
pj, sj, source, dest, secondary, target_adapter = \
self.property._create_joins(dest_polymorphic=True, dest_selectable=to_selectable, source_selectable=source_selectable)
for k in kwargs:
crit = self.property.mapper.class_manager[k] == kwargs[k]
if criterion is None:
criterion = crit
else:
criterion = criterion & crit
# annotate the *local* side of the join condition, in the case of pj + sj this
# is the full primaryjoin, in the case of just pj its the local side of
# the primaryjoin.
if sj:
j = _orm_annotate(pj) & sj
else:
j = _orm_annotate(pj, exclude=self.property.remote_side)
if criterion and target_adapter:
# limit this adapter to annotated only?
criterion = target_adapter.traverse(criterion)
# only have the "joined left side" of what we return be subject to Query adaption. The right
# side of it is used for an exists() subquery and should not correlate or otherwise reach out
# to anything in the enclosing query.
if criterion:
criterion = criterion._annotate({'_halt_adapt': True})
crit = j & criterion
return sql.exists([1], crit, from_obj=dest).correlate(source)