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Python Flask REST API Resourceful Blueprints Parse the Request

Andy Hughes
Andy Hughes
8,479 Points
Posted by Andy Hughes
Andy Hughes
8,479 Points

3 hours trying to find the problem. Can anyone help me please. Checked the community post but no luck. [Solved]

I've poured over this for hours. Checked and double checked syntax, rewatched the video 4-5 times, checked community answers. Still I can't figure it out. Any help would be welcome at this point.

Feeling a bit sick and tired of "Bummer: Try again.". An entirely pointless explanation :(

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(
            'measurement_type',
            required=True,
            location=['form', 'json']
        )
        self.reqparse.add_argument(
            'measurement_type',
            required=True,
            location=['form', 'json']
        )
        self.reqparse.add_argument(
            'quantity',
            type=float,
            required=True,
            location=['form', 'json']
        )
        self.reqparse.add_argument(
            'recipe',
            type=inputs.positive
            required=True,
            location=['form', 'json']
        )
        super().__init__()

    def get(self):
        return 'IngredientList'


class Ingredient(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',
            type=float,
            required=True,
            location=['form', 'json']
        )
        self.reqparse.add_argument(
            'recipe',
            type=inputs.positive,
            required=True,
            location=['form', 'json']
        )
        super().__init__()

    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

Andy Hughes
Andy Hughes
8,479 Points
Andy Hughes
Andy Hughes
8,479 Points

As soon as I posted for help, I managed to solve it.......typical lol.

For anyone else, who gets stuck on this. Where I copied and pasted, I'd had two errors so copy and paste just duplicated the errors. So one was indeed syntax as I suspected. I left off a comma, which became two commas.

Originally, I tried to be clever and put all of the three string fields, in the same argument which didn't work. Then as I split them out, I made a mistake and had two entries for "measurement_type", whereas one of them should have been "description". Easily done, but glad I fixed it myself. :)