flask web:构建MVC框架

悠悠 2023-07-25 09:06 188阅读 0赞

源码下载：[https://download.csdn.net/download/ayangann915/12325618][https_download.csdn.net_download_ayangann915_12325618]

项目目录：  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2F5YW5nYW5uOTE1_size_16_color_FFFFFF_t_70]

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:root@127.0.0.1/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  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2F5YW5nYW5uOTE1_size_16_color_FFFFFF_t_70 1]

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

[https_download.csdn.net_download_ayangann915_12325618]: https://download.csdn.net/download/ayangann915/12325618
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2F5YW5nYW5uOTE1_size_16_color_FFFFFF_t_70]: /images/20230528/7305ea8f8c454545baaeb8ea27c3b7b0.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2F5YW5nYW5uOTE1_size_16_color_FFFFFF_t_70 1]: /images/20230528/79225d64946d4c9691aaa98e7ea621de.png