Flask: Why is my JSON response empty when using Flask-RESTful with a custom resource?
I'm collaborating on a project where I'm working on a Flask application using Flask-RESTful and I have a custom resource that is supposed to return a JSON response. However, whenever I send a GET request to the endpoint, the response is empty, even though I can confirm that data exists in the database. Here’s the basic structure of my code: ```python from flask import Flask from flask_restful import Api, Resource from flask_sqlalchemy import SQLAlchemy app = Flask(__name__) app.config['SQLALCHEMY_DATABASE_URI'] = 'sqlite:///test.db' db = SQLAlchemy(app) api = Api(app) class User(db.Model): id = db.Column(db.Integer, primary_key=True) name = db.Column(db.String(80), nullable=False) def to_dict(self): return {'id': self.id, 'name': self.name} class UserResource(Resource): def get(self): users = User.query.all() # Fetch all users return {'users': [user.to_dict() for user in users]} api.add_resource(UserResource, '/users') if __name__ == '__main__': db.create_all() app.run(debug=True) ``` When I hit the `/users` endpoint, I get a response like this: ```json { "users": [] } ``` I’ve ensured that there are entries in the database by checking through a SQLite viewer, and I can see that users are there. I suspect this might have something to do with the database connection or the way I'm fetching the data, but I can’t pinpoint the scenario. I’ve tried adding print statements in the `get` method to debug, and they confirm that `users` is empty at that point. Additionally, I’ve verified that the database table is populated correctly. Any insight into why my JSON response is empty would be greatly appreciated. I am using Flask 2.0.1 and Flask-RESTful 0.3.9. I'm coming from a different tech stack and learning Python. I'd really appreciate any guidance on this. For reference, this is a production service. What would be the recommended way to handle this? This is part of a larger web app I'm building.