Скачать или смотреть Flask-SQLAlchemy tables are defined in the schema but not getting created [duplicate]

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I am creating my first, simple RBAC login/signup page using Flask.
This is my project structure
├── app.py
├── flask_api
│   ├── __init__.py
│   ├── config.py
│   ├── extensions.py
│   ├── models.py
│   └── routes.py
├── instance
└── migrations
   ├── _pycache_
   ├── env.py
   └── versions

├── app.py
├── flask_api
│   ├── __init__.py
│   ├── config.py
│   ├── extensions.py
│   ├── models.py
│   └── routes.py
├── instance
└── migrations
   ├── _pycache_
   ├── env.py
   └── versions

app.py
app.py
from flask_api import create_app

app = create_app()

if _name_ == '__main__':
app.run(debug=True)

from flask_api import create_app

app = create_app()

if _name_ == '__main__':
app.run(debug=True)

__init__.py
__init__.py
from flask import Flask
from flask_api.config import Config
from flask_api.extensions import db, migrate, init_extensions, user_datastore
from flask_api.routes import main

def create_app():
app = Flask(__name__)
app.config.from_object(Config)
init_extensions(app) # Initializing extensions
app.register_blueprint(main) # Registering blueprint
return app

if _name_ == '__main__':
app = create_app()
app.run(debug=True)

from flask import Flask
from flask_api.config import Config
from flask_api.extensions import db, migrate, init_extensions, user_datastore
from flask_api.routes import main

def create_app():
app = Flask(__name__)
app.config.from_object(Config)
init_extensions(app) # Initializing extensions
app.register_blueprint(main) # Registering blueprint
return app

if _name_ == '__main__':
app = create_app()
app.run(debug=True)

extensions.py
extensions.py
from flask_sqlalchemy import SQLAlchemy
from flask_security import Security, SQLAlchemyUserDatastore
from flask_migrate import Migrate
from flask_api.models import User, Role

db = SQLAlchemy()
migrate = Migrate()
user_datastore = SQLAlchemyUserDatastore(db, User, Role)

def init_extensions(app):
global user_datastore, security
db.init_app(app)
migrate.init_app(app, db)
security = Security(app, user_datastore)

from flask_sqlalchemy import SQLAlchemy
from flask_security import Security, SQLAlchemyUserDatastore
from flask_migrate import Migrate
from flask_api.models import User, Role

db = SQLAlchemy()
migrate = Migrate()
user_datastore = SQLAlchemyUserDatastore(db, User, Role)

def init_extensions(app):
global user_datastore, security
db.init_app(app)
migrate.init_app(app, db)
security = Security(app, user_datastore)

models.py
models.py
from flask_sqlalchemy import SQLAlchemy
from flask_security import UserMixin, RoleMixin

db = SQLAlchemy()

roles_users = db.Table('roles_users',
db.Column('user_id', db.Integer(), db.ForeignKey('user.id')),
db.Column('role_id', db.Integer(), db.ForeignKey('role.id'))
)

class Role(db.Model, RoleMixin):
...

class User(db.Model, UserMixin):
...

from flask_sqlalchemy import SQLAlchemy
from flask_security import UserMixin, RoleMixin

db = SQLAlchemy()

roles_users = db.Table('roles_users',
db.Column('user_id', db.Integer(), db.ForeignKey('user.id')),
db.Column('role_id', db.Integer(), db.ForeignKey('role.id'))
)

class Role(db.Model, RoleMixin):
...

class User(db.Model, UserMixin):
...

routes.py
routes.py
from flask import Blueprint, request, jsonify
from flask_api.models import db, User, Role
from flaskSource of the question:
https://stackoverflow.com/questions/7...

Question and source license information:
https://meta.stackexchange.com/help/l...
https://stackoverflow.com/