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Python Flask REST API Resourceful Blueprints Ingredient Fields

Arun Singh
Arun Singh
1,530 Points
Posted by Arun Singh
Arun Singh
1,530 Points

Code error output

Didn't get the right output for Ingredient.get(); Didn't get the right output for IngredientList.get(); Didn't get the right output forIngredientList.post()`

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__()


    @marshal_with(ingredient_fields)
    def get(self):
        ingredients = models.Ingredient.select()
        return ingredients()


    @marshal_with(ingredient_fields)
    def post(self):
        args = self.reqparse.parse_args()
        ingredient = models.Ingredient.create(**args)
        return ingredients(ingredient)


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 = models.Ingredient.get(models.Ingredient.id==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

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

For IngredientList.get() you have to marshal each item in the list. ingredients = [marshal(m, ingredient_fields) for m in models.Ingredient.select()]

For IngredientList.post() since you used the decorator, you can just return ingredient.

For Ingredient.get(), you forgot to marshal the ingredient. You can use the decorator or return marshal(ingredient, ingredient_fields).