Flask-SQLAlchemy (mssql+pyodbc) and Existing Models with Blueprint - sql-server

Question

I have this following Flask application/folder structure in python3.6 Enviroment:
site/
__init__.py
models.py
static/
templates/
dashboard/
index.html
login/
index.html
views/
__init__.py
login.py
config.py
run.py
My files looks like this:
run.py
from site import app
app.run()
config.py
class BaseConfig(object):
DEBUG = False
TESTING = False
WFT_CSRF_ENABLED = True
class DevConfig(BaseConfig):
DEBUG = True
SECRET_KEY = 'dev'
SQLALCHEMY_DATABASE_URI = 'DRIVER={ODBC Driver 11 for SQL Server};SERVER=myServer;DATABASE=myDB;TRUSTED_CONNECTION=yes'
SQLALCHEMY_TRACK_MODIFICATIONS = False
site/init.py
from flask import Flask
from flask_sqlalchemy import SQLAlchemy
app = Flask(__name__)
app.config.from_object('config.DevConfig')
db = SQLAlchemy(app)
from site.views import login
app.register_blueprint(login.mod)
site/views/login.py
from flask import Blueprint, render_template
mod = Blueprint('login', __name__)
#mod.route('/')
def index():
return render_template('login/index.html')
site/models.py
class User(db.Model):
__table__ = db.Model.metadata.tables['users']
def __repr__(self):
return '<User %r>' % self.username
what i am trying to do is to connect and use a existing model in my ms-sql database which is called user.
I am very new with Flask, Flask-SQLAlchemy, Blueprint and Python and I am stucked on how to use the db.Model in my login.py. How to achieved this in a Blueprint paradigm?
Any help and direction will be much appriciated and thanks for the help in advanced!
regards,
maki

Answer 1

you can add the following lines to your login.py:
from site import db
from site.models import User
to add an new user to the database you can use this :
new_user = User()
db.session.add(new_user)
db.session.commit()
and add this in your user table :
_tablename__ = 'user'
you will need to change you database URI in the config by following the syntax suggested in the flask_sqlalchemy doc
replace what you have by this :
SQLALCHEMY_DATABASE_URI : mysql://username:password#server_adress/db_name
for user authentification i can suggest you flask_login