Welcome to the Treehouse Community

The Treehouse Community is a meeting place for developers, designers, and programmers of all backgrounds and skill levels to get support. Collaborate here on code errors or bugs that you need feedback on, or asking for an extra set of eyes on your latest project. Join thousands of Treehouse students and alumni in the community today. (Note: Only Treehouse students can comment or ask questions, but non-students are welcome to browse our conversations.)

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and a supportive community. Start your free trial today.

Python Flask REST API Resourceful Blueprints Parse the Request

Posted by Brandon Meredith
Brandon Meredith
29,350 Points

Stuck on reqparser challenge

Challenge - The API needs to be able to validate input from users. Use reqparse and add arguments for each field in the Ingredient model to the IngredientList resource. Remember to add the RequestParser instance to the resource instance as self.reqparse. • name, description, and measurement_type should all be strings (the default) • quantity should be a normal Python float • recipe should be positive, which you'll get from inputs They should all be required and have their location set to ["form", "json"].

However, I keep ending up with: Bummer! "description" should be in the arguments, required, and located in form or json; "measurement_type" should be in the arguments, required, and located in form or json; "name" should be in the arguments, required, and located in form or json; "quantity" should be in the arguments, of type float, required, and located in form or json; "recipe" should be in the arguments, of type positive, required, and located in form or json

I know it's something silly, but my laced mind has not had a chance to get up to speed today. Any suggestions?

resources/ingredients.py 
from flask import Blueprint

from flask.ext.restful import Resource, Api, reqparse, inputs

import models


class IngredientList(Resource):
    def __init__(self):
        self.reqparse = reqparse.RequestParser()
        self.reqparse.add_argument(
            'name',
            required=True,
            location=['form', 'json']
        )
        self.reqparse.add_argument(
            'description',
            required=True,
            location=['form', 'json']
        )
        self.reqparse.add_argument(
            'measurement_type',
            required=True,
            location=['form', 'json']
        )
        self.reqparse.add_argument(
            'quantity',
            required=True,
            location=['form', 'json'],
            type=float
        )
        self.reqparse.add_argument(
            'recipe',
            required=True,
            location=['form', 'json'],
            type=inputs.postive
        )
    def get(self):
        return 'IngredientList'


class Ingredient(Resource):
    def get(self, id):
        return 'Ingredient'

ingredients_api = Blueprint('resources.ingredients', __name__)
api = Api(ingredients_api)
api.add_resource(IngredientList, '/api/v1/ingredients')
api.add_resource(Ingredient, '/api/v1/ingredients/<int:id>')

2 Answers

Kenneth Love
STAFF
Kenneth Love
Treehouse Guest Teacher
Kenneth Love
Kenneth Love
Treehouse Guest Teacher

postive isn't positive :)

Can't make the error show in the CC, though, :S

Brandon Meredith
Brandon Meredith
29,350 Points

....DOH - Homer

Brandon Meredith
Brandon Meredith
29,350 Points
Brandon Meredith
Brandon Meredith
29,350 Points

Note to self: Wait for coffee