def add_goal(self, goal_properties):
"""
Add goal to user
:param goal_id: string uuid
:return: List of user goals
"""
#TODO exception handling
goal = Goal()
goal.set_goal_properties(goal_properties=goal_properties)
goal.create_goal()
# create relationship between user and interest node
user_goal_relationship = Relationship(self.user_node,
GraphRelationship.HAS_GOAL,
goal.goal_node)
self._graph_db.create_unique(user_goal_relationship)
#TODO set properties on the relationship -- may use a unique id as the key
return self.user_goals
