neo4j 驱动函数等价于 py2neo 函数

Question

def get_nlg(graph_query):
    driver = Graph("neo4j://localhost:7687", auth=("neo4j","password"))
    graph_response = graph.evaluate(graph_query)

上面的代码，我用下面的驱动代码替换了，但是不行，neo4j驱动中的函数相当于py2neo中的evaluate()函数是什么？

    def get_nlg(graph_query):
        driver = GraphDatabase.driver("neo4j://localhost:7687", auth=("neo4j","password"))

        with driver.session() as session:
            graph_response = session.run(graph_query)
            return graph_response

当第二个代码的 graph_response 的结果传递给下面的代码时，我收到一个错误

TypeError: is not JSON serializable

class GetBiggestComponent(Action):
    def name(self):
        return "action_get_biggest_component"

    def run(self, dispatcher, tracker, domain):
        query = None
        intent = tracker.latest_message['intent']
        child_comp = tracker.get_slot('component_type_child')
        parent_comp = tracker.get_slot('component_type_parent')
        error = None
        graph_response = GenerateQuery.get_biggest_component(child_comp, parent_comp)
        graph_response['intent_name'] = intent['name']
        dispatcher.utter_custom_message(graph_response)
        return []

在行中传递时错误来了

dispatcher.utter_custom_message(graph_response)

Answer 1

没有直接的等价物。您将需要run 进行查询，然后从返回的第一条记录中选择第一个值。这就是evaluate 在幕后所做的一切。