def get_query(self, database_session, state):
query = Query(self.id_column)
already_joined = []
for column_key in self.columns:
if self.column_def[column_key].get("column") is not None:
column = self.column_def[column_key]["column"]
if column.class_ != self.model:
if self.column_def[column_key]["outer_join"]:
if self.column_def[column_key][
"join_expression"] is not None:
query = query.outerjoin(
column.class_,
self.column_def[column_key]["join_expression"])
else:
query = query.outerjoin(column.class_)
else:
if self.column_def[column_key][
"join_expression"] is not None:
query = query.join(
column.class_,
self.column_def[column_key]["join_expression"])
else:
query = query.join(column.class_)
query = query.add_column(column.label(column_key))
elif self.column_def[column_key].get("expression") is not None:
expression = self.column_def[column_key]["expression"]
if self.column_def[column_key]["join"] is None:
query = query.add_column(expression.label(column_key))
elif self.column_def[column_key][
"join"] is not None and not self.column_def[
column_key]["outer_join"]:
if not self.column_def[column_key][
"join"] in already_joined:
if self.column_def[column_key][
"join_expression"] is not None:
query = query.join(
self.column_def[column_key]["join"],
self.column_def[column_key]["join_expression"])
else:
query = query.join(
self.column_def[column_key]["join"])
already_joined.append(
self.column_def[column_key]["join"])
query = query.add_column(expression.label(column_key))
elif self.column_def[column_key][
"join"] is not None and self.column_def[column_key][
"outer_join"]:
if not self.column_def[column_key][
"join"] in already_joined:
if self.column_def[column_key][
"join_expression"] is not None:
query = query.outerjoin(
self.column_def[column_key]["join"],
self.column_def[column_key]["join_expression"])
else:
query = query.outerjoin(
self.column_def[column_key]["join"])
already_joined.append(
self.column_def[column_key]["join"])
query = query.add_column(expression.label(column_key))
if database_session:
return query.with_session(database_session)
else:
return query
