works

app/__init__.py

@@ -1,14 +1,17 @@
 from flask import Flask
 from flask_sqlalchemy import SQLAlchemy
 from config import config
+from app.models import db, Base
+from flask_migrate import Migrate
+
 
-db = SQLAlchemy()
 
 def create_app(config_name='default'):
     app = Flask(__name__)
     app.config.from_object(config[config_name])
     
     db.init_app(app)
+    migrate = Migrate(app, db)
     
     from app.routes import main
     app.register_blueprint(main)