Question

我试图用按钮点击按钮来调用一个函数。以下是我的代码片段，可以让我的问题更加清晰。

class User:
    def __init__(self, username):
        self.username = username

    def find(self):
        user = graph.find_one("User", "username", self.username)
        return user

    def add_restaurant(self, name, cuisine, location):
        user=self.find()
        restaurant = Node("Restaurant", id=str(uuid.uuid4()),name=name)
        graph.create(restaurant)
        graph.create(rel(user,"LIKES", restaurant))

        rest_type = Node("Cuisine", cuisine=cuisine)
        graph.create(rest_type)
        graph.create(rel(restaurant,"SERVES", rest_type))

        loc = Node("Location", location=location)
        graph.create(loc)
        graph.create(rel(restaurant, "IN", loc))

add_restaurant函数应该在Neo4j图数据库中创建3个节点及其对应关系，并且工作正常。但是，当我从我的Flask文件中调用此函数时，我得到了一个 AttributeError: User instance has no attribute 'add_restaurant'

这是Flask文件中的功能

@app.route('/add_restaurant', methods=['POST'])
def add_restaurant():
    name = request.form['name1']
    cuisine = request.form['cuisine1']
    location = request.form['location1']
    username = session.get('username')

    if not name or not cuisine or not location:
        if not name:
            flash('You must enter a restaurant name')
        if not cuisine:
            flash('What cuisine does the restaurant belong to')
        if not location:
            flash('You must enter a location')
    else:
        User(username).add_restaurant(name, cuisine, location) #Error comes from here.

    return redirect(url_for('index'))

从文本字段生成名称，菜肴和位置。得到这个错误我做错了什么？

Answer 1

我在堆栈overflow上看到了一些类似的问题。我想当你用

创建用户实例时

User(username).add_restaurant(name, cuisine, location)

用户未正确实例化。试试：

else:
    user = user(username)
    user.add_restaurant(name, cuisine, location)

如果这有任何帮助，请告诉我们。

类实例没有属性，在Flask中调用函数时出错

1 个答案: