Add these packages to your requirements.txt: flask Flask-SQLAlchemy psycopg2-binary Then install them from your terminal pip install -r requirements.txt In main.py: from flask import Flask from flask_sqlalchemy import SQLAlchemy from flask_cors import CORS # database connection parameters DB_HOST = 'localhost' DB_PORT = 5432 DB_
To spin up Postgres on Docker, create docker-compose.yml like so: version: '3.3' services: db: image: postgres:14-alpine # alpine images are lighweight restart: always container_name: db ports: - 5432:5432 # expose default Postgres port for connections environment: # initialize database connection parameters with environment variables. # more info:
class Class(db.Model): id = db.Column(db.Integer, primary_key=True) students = db.relationship('Students', backref='class') def as_dict(self): result = {col.name: getattr(self, col.name) for col in self.__table__.columns} # add students data to result dict result['students'] = [student.