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Python Flask REST API Resourceful Blueprints Ingredient Fields

Posted by Bence Vass
Bence Vass
7,671 Points

ds

Why is my post is not correct?

resources/ingredients.py 
from flask import Blueprint

from flask.ext.restful import (
    Resource, Api, reqparse, inputs,
    marshal, marshal_with, fields
)

import models

ingredient_fields = {
    'name': fields.String,
    'description': fields.String,
    'measurement_type': fields.String,
    'quantity': fields.Float,
    'recipe': fields.String    
}

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',
            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):
        ingredients = [marshal(ingredient,ingredient_fields) for ingredient in models.Ingredient.select()]
        return {'ingredients':ingredients}

    def post(self):
        args = self.reqparse.parse_args()
        ingredients = [marshal(ingredient,ingredient_fields) for ingredient in ingredientmodels.Ingredient.create(**args)]
        return jsonify({'ingredients':ingredients})


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):
        ingredient = marshal(models.Ingredient.get(models.Ingredient.id==id),ingredient_fields)
        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

ursaminor
ursaminor
11,271 Points
ursaminor
ursaminor
11,271 Points

Hint: post creates one ingredient, not a list of them. So all you have to do is marshal(ingredient, ingredient_fields) in the return. You're just telling it, "Hey, serialize and return this ingredient that I just created in the format I described in ingredient_fields."