Modifying a Flask-Restless result array

I think you need to use postproccessors since you need to modify the json response before sending it back to the client.

OK, I reproduced your problem. Now it's working. Here is my code:

import flaskimport flask_sqlalchemyimport flask_restless# Create the Flask application and the Flask-SQLAlchemy object.app = flask.Flask(__name__)app.config['DEBUG'] = Trueapp.config['SQLALCHEMY_DATABASE_URI'] = 'sqlite:////tmp/test.db'db = flask_sqlalchemy.SQLAlchemy(app)# Create your Flask-SQLALchemy models as usual but with the following# restriction: they must have an __init__ method that accepts keyword# arguments for all columns (the constructor in# flask_sqlalchemy.SQLAlchemy.Model supplies such a method, so you# don't need to declare a new one).class User(db.Model):    __tablename__ = 'user'    id = db.Column(db.Integer, primary_key=True)    username = db.Column(db.String)    userdetails = db.relationship('UserDetails', backref='User', lazy='dynamic')class UserDetails(db.Model):    __tablename__ = 'user_details'    id = db.Column(db.Integer, primary_key=True)    detail = db.Column(db.String)    detail_name = db.Column(db.String)    user_id = db.Column(db.Integer, db.ForeignKey("user.id"), nullable=False)# Create the database tables.db.create_all()# Create the Flask-Restless API manager.manager = flask_restless.APIManager(app, flask_sqlalchemy_db=db)user = User(username='plasmy')userdetail_0 = UserDetails(detail='A name', detail_name='Full Name' )userdetail_1 = UserDetails(detail='an@email.com', detail_name='Email')userdetail_2 = UserDetails(detail='An Address', detail_name='Address')userdetail_3 = UserDetails(detail='999-999-9999', detail_name='Phone Number')user.userdetails.append(userdetail_0)user.userdetails.append(userdetail_1)user.userdetails.append(userdetail_2)user.userdetails.append(userdetail_3)db.session.add(user)db.session.commit()print('USER CREATED')def detail_sort(result, **kw):    print('detail_sort called')    print(result)    for entry in result['objects']:        entry['userdetails'] = {item['detail_name']: item['detail'] for item in                                entry['userdetails']}    print('MODIFIED JSON: ', result)# Create API endpoints, which will be available at /api/<tablename> by# default. Allowed HTTP methods can be specified as well.# manager.create_api(Person, methods=['GET', 'POST', 'DELETE'])# manager.create_api(Article, methods=['GET'])manager.create_api(User, methods=['GET', 'POST', 'DELETE'],                   postprocessors={                       'GET_MANY': [detail_sort]                   })manager.create_api(UserDetails, methods=['GET'], )# start the flask loopapp.run(use_reloader=False)

Note that you need to use GET_MANY and look how detail_sort is implemented.

Without using postprocessor the response is like this:

{  "num_results": 1,   "objects": [    {      "id": 1,       "userdetails": [        {          "detail": "A name",           "detail_name": "Full Name",           "id": 1,           "user_id": 1        },         {          "detail": "an@email.com",           "detail_name": "Email",           "id": 2,           "user_id": 1        },         {          "detail": "An Address",           "detail_name": "Address",           "id": 3,           "user_id": 1        },         {          "detail": "999-999-9999",           "detail_name": "Phone Number",           "id": 4,           "user_id": 1        }      ],       "username": "plasmy"    }  ],   "page": 1,   "total_pages": 1}

With postprocessor the response looks like this:

{  "num_results": 1,   "objects": [    {      "id": 1,       "userdetails": {        "Address": "An Address",         "Email": "an@email.com",         "Full Name": "A name",         "Phone Number": "999-999-9999"      },       "username": "plasmy"    }  ],   "page": 1,   "total_pages": 1}

Hope this helps.