Flask本身是一个轻量级的框架,所以使用很方便,我们要学习的是flask蓝图,组建企业级项目。
但是如果需求很小,使用flask开发,完全没有必要遵照蓝图模式,搭建一堆文件。
import os
# basedir = os.path.dirname(__file__)
# print(basedir)
class Config:
DEBUG = False
SQLALCHEMY_DATABASE_URI = "sqlite:////code/flask/CompanyProject/app/flask.db"
SQLALCHEMY_TRACK_MODIFICATIONS = True
SECRET_KEY = os.environ.get("SECRET_KEY") or 'hard to guess string'
@staticmethod
def init_app(app):
pass
class Test(Config):
DEBUG = True
SQLALCHEMY_DATABASE_URI = "sqlite:////code/flask/CompanyProject/app/test.db"
class Run(Config):
pass
config={
"test":Test,
"run":Run
}
from flask import Flask, render_template
from flask_sqlalchemy import SQLAlchemy
from config import config
db = SQLAlchemy()
def create_app(config_name):
app = Flask(__name__)
app.config.from_object(config[config_name])
config[config_name].init_app(app)
db.init_app(app)
from .main import main as main_blueprint
app.register_blueprint(main_blueprint)
return app
from flask import Blueprint
main = Blueprint("main", __name__)
from . import views, errors
from . import main
@main.route("/")
def index():
return "hello world"
import os
from app import create_app, db
from app.models import *
from flask_script import Manager, Shell
from flask_migrate import MigrateCommand, Migrate
# os.getenv 获取环境变量,获取不到返回None
app = create_app(os.getenv("FLASK_CONFIG") or "test")
manager = Manager(app)
migrate = Migrate(app, db)
def make_shell_context():
return dict(app=app, db=db, User=User, Type=Type)
def create_db():
db.create_all()
print("create success")
manager.add_command("shell", Shell(make_context=make_shell_context()))
manager.add_command("db", MigrateCommand)
if __name__ == '__main__':
manager.run()
启动命令行,切换到当前项目所在的目录,并且激活环境
1、python manage.py runserver 启动服务
2、Python manage.py db init 实例化数据库
3、Python manage.py db migrate -m "initial migration" 生成数据库语句
4、Python manage.py db upgrade 同步数据库
5、Python manage.py shell 交互命令