Connect to a Database in Flask, Which Approach is better? [closed]

Answer 1

To preserve the database connection within the same flask session you may use the application context and assign database connection. If the connection breaks,the context will try to establish the connection back as it polls the connection object continuously.

from flask import Flask
application = Flask(__name__)


def connect_to_database():
  db_handler = SqliteDBConnect("uid={0};""pwd={1}".format(UID, PWD),
                                table_prefix="{}".format(TBL_PRFX))
  return db_handler

fd = {'_database': None}
def get_db():
  db = fd['_database']
  if not isinstance(db, SqliteDBConnect):
    fd['_database'] = connect_to_database()
    db = fd['_database']
return db

with application.app_context():
  #Get DB connection from application's context
  db = LocalProxy(lambda: get_db())