我需要连接两个数据库。默认数据库是固定的,但另一个是动态的,它基于URL。动态数据库连接Flask-SQLAlchemy
例如,如果网址是:yourapp.myweb.com然后第二个数据库的名字将是yourapp
我尝试连接到数据库初始化的.py但它告诉我下面的错误
builtins.AssertionError
AssertionError: A setup function was called after the first request was handled. This usually indicates a bug in the application where a module was not imported and decorators or other functionality was called too late.
To fix this make sure to import all your view modules, database models and everything related at a central place before the application starts serving requests.
这里是我的初始化的.py
from flask import Flask,session
from flask_sqlalchemy import SQLAlchemy
import os
app = Flask(__name__,static_url_path='/static')
# Database Connection
database = request.url.split("/")[2].split(".")[0]
app.config['SQLALCHEMY_DATABASE_URI'] = "mysql+pymysql://root:[email protected]/main_database"
app.config['SQLALCHEMY_TRACK_MODIFICATIONS'] = True
app.config['SQLALCHEMY_BINDS'] = {
'user_db': 'mysql+pymysql://root:[email protected]/database_'+str(database), #dynamic Connection
}
db = SQLAlchemy(app)
db.create_all()
db.create_all(bind=['user_db'])
# db.init_app(app)
from . import views
这里是viwe.py
@app.route('/login', methods = ['GET'])
def index():
try:
from .model import Users
# Some Code
except Exception as e:
raise e
# return "Failed to login ! Please try again."
这里是model.py
from application import db
class Users(db.Model):
__bind_key__ = 'user_db'
__tablename__ = 'users'
id = db.Column(db.Integer, primary_key = True)
email = db.Column(db.String(50))
name = db.Column(db.String(50))
password = db.Column(db.String())
def __repr__(self):
return '<User %r>' % self.name
我认为当我开始我的应用程序它没有任何request.url因此可能是.. –
如果有上述问题,然后哪个.py文件最好连接数据库? –
尝试将'from .model import Users'放在模块的顶层。 – Fian