def is_many_to_one(conn, relationtype_name):
"""
Returns True when relation type is many to one, otherwise False
"""
return is_unique(conn, "relation", relationtype_name, "target_id")
def is_one_to_many(conn, relationtype_name):
"""
Returns True when relation type is one to many, otherwise False
"""
return is_unique(conn, "relation", relationtype_name, "source_id")
