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Python

Matthew McElwee
Matthew McElwee
16,545 Points
Posted by Matthew McElwee
Matthew McElwee
16,545 Points

Trouble with the Parse the Request Code 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"]."

So I'm having some trouble with this part of the challenge. I'm going through it just like in the video, however I keep getting a Whoops Try Again. Any thoughts?

    __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.positive
        )
Iain Simmons
Iain Simmons
Treehouse Moderator 32,252 Points

Can you provide a link to the course/challenge this came from?

Also, can you please include all the code in the file, not just this part?

Matthew McElwee
Matthew McElwee
16,545 Points
Matthew McElwee
Matthew McElwee
16,545 Points

Here is the link to the code challenge

from flask import Blueprint

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

import models


class IngredientList(Resource):
    def get(self):
        return 'IngredientList'

    __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.positive
        )


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>')

1 Answer

Iain Simmons
Iain Simmons
Treehouse Moderator 32,252 Points

Oh... try adding the def keyword before __init__(self):

Matthew McElwee
Matthew McElwee
16,545 Points
Matthew McElwee
Matthew McElwee
16,545 Points

Thank you so much. I don't know how I missed that! You rock!

Iain Simmons
Iain Simmons
Treehouse Moderator 32,252 Points

No problem! It'd be helpful if the challenges included some error messages, more than 'Whoops! Try Again' or 'Bummer!', but perhaps they thought that would scare people off! :)