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                            # 73 項目結構重構

## exts.py

```text
from flask_sqlalchemy import SQLAlchemy

db = SQLAlchemy()
```

## models.py

```text
from exts import db

class User(db.Model):
    __tablename__ = 'user'
    id = db.Column(db.Integer,primary_key=True,autoincrement=True)
    username = db.Column(db.String(50),nullable=False)
```

## config.py

```text
DB_USERNAME = 'root'
DB_PASSWORD = '123456'
DB_HOST = '127.0.0.1'
DB_PORT = '3306'
DB_NAME = 'flask_migrate_demo'

DB_URI = 'mysql+pymysql://%s:%s@%s:%s/%s?charset=utf8' % (DB_USERNAME,DB_PASSWORD,DB_HOST,DB_PORT,DB_NAME)

SQLALCHEMY_DATABASE_URI = DB_URI
```

## myapp.py

```text
from flask import Flask
import config
from exts import db

app = Flask(__name__)
app.config.from_object(config)
# 獲取app
db.init_app(app)


@app.route('/')
def hello_world():
    return 'Hello World!'

@app.route("/profile/")
def profile():
    pass


if __name__ == '__main__':
    app.run()
```


                    
                
        
                
            
        
                
    
                
    
                
        
                
    
                

                







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