Flask拆分/结藕

项目结构

• manage.py 项目管理文件
• App 目录
• __init__.py 初始化文件
• settings.py 全局配置文件
• extends.py 扩展库，用户扩展项目插件
• views.py 路由，视图函数
• models.py 定制模型

 

manage.py

import os
 
from flask_script import Manager
from flask_migrate import MigrateCommand
 
from App import create_app
 
# 环境变量，获取当前Flask环境
env = os.environ.setdefault('FLASK_ENV','devlop')
 
# 生成app
app = create_app(env)
manager = Manager(app)
 
# 给manage.py 添加数据库迁移的命令
manager.add_command('db',MigrateCommand)
 
if __name__ == '__main__':
    manager.run()

App/__init__.py

from flask import Flask
 
# 初始化app，并返回
from App.settings import envs
from App.extends import init_extends
from App.views import init_views
 
 
def create_app(env):
    # 创建Flask的app对象
    app = Flask(__name__)
 
    # 加载配置文件
    app.config.from_object(envs.get(env))
    # 初始化扩展对象
    init_extends(app)
    # 初始化视图
    init_views(app)
 
    return app

App/settings.py 

import re
 
 
class Config(object):
    DEBUG = False
    TESTING = False
    SQLALCHEMY_TRACK_MODIFICATIONS = False
 
    @classmethod
    def get_db_uri(cls,dbinfo):
        engine = dbinfo.get('ENGINE') or "sqlite3"
        driver = dbinfo.get('DRIVER') or ""
        name = dbinfo.get('NAME') or ""
        user = dbinfo.get('USER') or ""
        port = dbinfo.get('PORT') or ""
        host = dbinfo.get('HOST') or ""
        password = dbinfo.get('PASSWORD') or ""
 
        if re.match(r'^sqlite3?$', engine):
            # 默认是sqlite数据库
            db_uri = "{}://{}/{}.{}".format(driver, host, name, engine)
        else:
            # database: engine+driver://user:password@host:port/database
            db_uri = "{}+{}://{}:{}@{}:{}/{}".format(
                engine, driver, user, password, host, port, name)
 
        # 返回数据库连接地址
        return db_uri
 
class DevlopConfig(Config):
    DEBUG = True
 
    # dbinfo = {
    #
    # }
 
    # 加载数据库
    # SQLALCHEMY_DATABASE_URI = super().get_db_uri(dbinfo)
    SQLALCHEMY_DATABASE_URI = 'sqlite:///demo3.sqlite3'
 
# 设置环境设置配置
envs = {
    'devlop':DevlopConfig,
}
 
 
def config():
    """当前的配置文件"""
    return envs.get(os.environ.get('FLASK_ENV'))

App/views.py

from flask import Blueprint
 
blue = Blueprint('blue',__name__)
 
def init_views(app):
    app.register_blueprint(blue)
 
@blue.route('/')
def index():
    return "Index"

App/extends.py

from flask_migrate import Migrate
from flask_sqlalchemy import SQLAlchemy
 
models = SQLAlchemy()
migrate = Migrate()
 
def init_extends(app):
    # 初始化模型类，及迁移模型对象
    models.init_app(app)
    migrate.init_app(app,models)

App/models.py

from .extends import models
 
class User(models):
    id = models.Column(models.Integer,primary_key=True)
    username = models.Column(models.String)
    password = models.Column(models.String)