def __get_entities(self):
if self._relationship is None:
ents = list(self._session.iterator(self.entity_class))
else:
if self._relationship.children is None:
ents = list(self._session.iterator(self.entity_class))
visitor = \
get_filter_specification_visitor(EXPRESSION_KINDS.EVAL)()
self._relationship.specification.accept(visitor)
ents = visitor.expression(ents)
else:
ents = self._relationship.children
if not self._filter_spec is None:
visitor = get_filter_specification_visitor(EXPRESSION_KINDS.EVAL)()
self._filter_spec.accept(visitor)
ents = visitor.expression(ents)
# Record the total count of matching entities.
count = len(ents)
if not self._order_spec is None:
visitor = get_order_specification_visitor(EXPRESSION_KINDS.EVAL)()
self._order_spec.accept(visitor)
ents = visitor.expression(ents)
if not self._slice_key is None:
ents = ents[self._slice_key]
return ents, count
def __get_entities(self):
if self._relationship is None:
ents = list(self._session.iterator(self.entity_class))
else:
if self._relationship.children is None:
ents = list(self._session.iterator(self.entity_class))
visitor = \
get_filter_specification_visitor(EXPRESSION_KINDS.EVAL)()
self._relationship.specification.accept(visitor)
ents = visitor.expression(ents)
else:
ents = self._relationship.children
if not self._filter_spec is None:
visitor = get_filter_specification_visitor(EXPRESSION_KINDS.EVAL)()
self._filter_spec.accept(visitor)
ents = visitor.expression(ents)
# Record the total count of matching entities.
count = len(ents)
if not self._order_spec is None:
visitor = get_order_specification_visitor(EXPRESSION_KINDS.EVAL)()
self._order_spec.accept(visitor)
ents = visitor.expression(ents)
if not self._slice_key is None:
ents = ents[self._slice_key]
return ents, count
def make_order_string(cls, order_specification):
"""
Converts the given order specification to a CQL order expression.
"""
visitor_cls = get_order_specification_visitor(EXPRESSION_KINDS.CQL)
visitor = visitor_cls()
order_specification.accept(visitor)
return str(visitor.expression)
def order_by(self, *args):
spec = order(*args)
visitor_cls = get_order_specification_visitor(self.expression_kind)
vst = visitor_cls(self._entity_class)
spec.accept(vst)
return vst.order_query(self)
def order_by(self, *args):
spec = order(*args)
vst_cls = get_order_specification_visitor(EXPRESSION_KINDS.SQL)
vst = vst_cls(self._entity_class)
spec.accept(vst)
return vst.order_query(self)
def _order_visitor_factory(self):
"""
Override this to create order visitors with custom clauses.
"""
visitor_cls = get_order_specification_visitor(self.expression_kind)
return visitor_cls(self.entity_class)
def order_by(self, *args):
spec = order(*args)
vst_cls = get_order_specification_visitor(EXPRESSION_KINDS.SQL)
vst = vst_cls(self._entity_class)
spec.accept(vst)
return vst.order_query(self)
def make_order_string(cls, order_specification):
visitor_cls = get_order_specification_visitor(EXPRESSION_KINDS.CQL)
visitor = visitor_cls()
order_specification.accept(visitor)
return str(visitor.expression)
def _order_visitor_factory(self):
visitor_cls = get_order_specification_visitor(EXPRESSION_KINDS.SQL)
return visitor_cls(self.entity_class)
def _order_visitor_factory(self):
visitor_cls = get_order_specification_visitor(EXPRESSION_KINDS.SQL)
return visitor_cls(self.entity_class)
def make_order_string(cls, order_specification):
visitor_cls = get_order_specification_visitor(EXPRESSION_KINDS.CQL)
visitor = visitor_cls()
order_specification.accept(visitor)
return str(visitor.expression)
def order_by(self, *args):
spec = order(*args)
visitor_cls = get_order_specification_visitor(self.expression_kind)
vst = visitor_cls(self._entity_class)
spec.accept(vst)
return vst.order_query(self)
