flask操作mongo两种方式--ORM

#manage.py
#coding=utf-8
#Flask-Script是一个可以在flask应用外部编写脚本的扩展
#常用功能：
#运行一个开发的服务器
#python shell中操作数据库看
#命令行任务
#from flask_script import Manager
#执行语句 python manage.py save

from flask_script import Manager
from app import app, db
from models import User

manager = Manager(app)

@manager.command
def save():
    user = User("dadao3", "dadao3@123.com")
    user.save()

@manager.command
def query_users():
    users = User.objects.all()
    for u in users:
        print u

if __name__ == "__main__":
    manager.run()

#models.py
#coding=-utf-8

from app import db

class User(db.Document):
    name = db.StringField()
    email = db.StringField()

    def __str__(self):
        return "name: %s--email: %s" % (self.name, self.email)

#app.py
#coding=utf-8
# pip install flask-mongoengine
from flask import Flask
from flask.ext.mongoengine import MongoEngine

app = Flask(__name__)
app.config["MONGODB_SETTINGS"] = {"db":"users"}

db = MongoEngine(app)

@app.route("/")
def main():
    return "hello world"

if __name__ == "__main__":
    app.run(debug=True)