flask web:构建MVC框架

源码下载：https://download.csdn.net/download/ayangann915/12325618

项目目录：

base_setting.py:是默认的设置信息，一般存放公共的，如端口号等

SERVER_PORT = 5000
DEBUG = False
SQLALCHEMY_ECHO = False

local_setting.py:存放开发时需要的信息，如数据库，开发时debug为True

SQLALCHEMY_DATABASE_URI = "mysql://root:[email protected]/user_grade"
SQLALCHEMY_TRACK_MODIFICATIONS = False
SQLALCHEMY_ECHO = True
DEBUG=True
SQLALCHEMY_ENCODING = 'utf-8'

连接数据库时需要的信息，否则终端给提示

production_setting.py:实际应用，生产环境
这时debug需要设置为false

DEBUG=False

可以在终端set使用哪个setting文件：

        if 'ops_config' in os.environ:
            self.config.from_pyfile('config/%s_setting.py' % (os.environ['ops_config']))

运行时：

export ops_config=local#相当于指定使用local_setting文件

application.py:封装变量等

from flask import Flask
from flask_script import Manager
from flask_sqlalchemy import SQLAlchemy
import os

class Application(Flask):
    def __init__(self, import_name):
        super(Application, self).__init__(import_name)
        self.config.from_pyfile('config/base_setting.py')

        if 'ops_config' in os.environ:
            self.config.from_pyfile('config/%s_setting.py' % (os.environ['ops_config']))

        db.init_app(self)

"""
export ops_config=local 

一般base是公用的，如端口号配置，数据库配置在local中
"""

db = SQLAlchemy()
app = Application(__name__)
manager = Manager(app)
#app = Flask(__name__)

www.py:模块注册

from web.controllers.index import route_index
from application import app

app.register_blueprint(route_index, url_prefix="/")

manager.py:启动入口

from application import app, manager
from flask_script import Server
import www

#自定义命令
manager.add_command("runserver", Server(host="0.0.0.0",port=app.config['SERVER_PORT'],use_debugger=True,use_reloader=None))


def main():
    manager.run()

if __name__ == '__main__':
    try:
        import sys
        sys.exit(main())
    except Exception as e:
        import traceback
        traceback.print_exc(e)

自定义server命令：
运行时输入：

python manager.py runserver