AttributeError：“PyMongo”对象没有属性“mydb2”

Question

from flask import Flask,request,render_template
from flask_pymongo import PyMongo

app =Flask(__name__)
app.config["MONGO_URI"] = "mongodb://localhost:27017/mydb2"
mongo = PyMongo(app)
db = mongo.mydb2
mycol =db.users
if __name__ == "__main__":
    app.run(debug=True)

它的显示：AttributeError: 'PyMongo' object has no attribute 'mydb2'

Answer 1

您的 MONGO_URI 已包含数据库 (mydb2)。根据https://flask-pymongo.readthedocs.io/en/latest/ ，您可以像这样重写您的代码：

db = mongo.db

[来自文档]

db
    The Database if the URI used named a database, and None otherwise.