AttributeError: type object 'PyMongo' has no attribute 'db' with Flask Blueprint Mongodb答案

【问题标题】：AttributeError: type object 'PyMongo' has no attribute 'db' with Flask Blueprint MongodbAttributeError: type object 'PyMongo' has no attribute 'db' with Flask Blueprint Mongodb
【发布时间】：2020-09-10 08:05:01
【问题描述】：

我是 flask 和 mongodb 的新手，我正在尝试将我的应用程序拆分为多个部分，但我在导入时遇到了问题，并且我收到了以下错误。

错误在 routes/users.py AttributeError: type object 'PyMongo' has no attribute 'db' 你能帮我一把吗？

run.py

from main import * 
if __name__ == "__main__":
    app.run(debug=True)

main.py

from flask import Flask,jsonify,make_response,request
from flask_pymongo import PyMongo
from databases.config import mongo
from routes.users import users

app = Flask(__name__)
app.config['MONGO_DBNAME'] = 'Users'
app.config['MONGO_URI'] = 'mongodb://localhost:27017/Users'
app.register_blueprint(users)

mongo = PyMongo(app)

databses/config.py

from flask_pymongo import PyMongo
mongo = PyMongo

routes/users.py

  import json,jsoncfg
  from flask import Blueprint,jsonify,make_response,request,Flask
  from flask_pymongo import PyMongo
  import sys
  sys.path.append("..")
  from databases.config import mongo
  from main import mongo
  users = Blueprint('users', __name__,)

  @users.route('/users', methods=['GET'])
  def get_all_users():
        users = mongo.db.Users
        test= users.find({"Nome":"Vincenzo"})
        output = []
        return jsonify({'result' : output})

【问题讨论】：

标签： python mongodb flask circular-dependency blueprint

【解决方案1】：

在 users.py

中解决

import json,jsoncfg
from flask import Blueprint,jsonify,make_response,request,Flask
from flask_pymongo import PyMongo
import sys
sys.path.append("..")
from databases.config import mongo
import main


users = Blueprint('users', __name__,)
@users.route('/users', methods=['GET'])
def get_all_users():
    mongo = PyMongo(main.app)
    users = mongo.db.Users
    test= users.find({"Nome":"Vincenzo"})
    output = []
    return jsonify({'result' : output})

【讨论】：