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Python Flask REST API Resourceful Blueprints Ingredient Resource

Dani Nanestean
Dani Nanestean
2,659 Points
Posted by Dani Nanestean
Dani Nanestean
2,659 Points

I'm stuck on this exercise, and the writing "Bummer: Try again!" doesn't help me understand the mistake

What I did:

models.py (first file)

import datetime

from peewee import *

DATABASE = SqliteDatabase('recipes.db')


class Recipe(Model):
    name = CharField()
    created_at = DateTimeField(default=datetime.datetime.now)

    class Meta:
        database = DATABASE

import datetime

from peewee import *

DATABASE = SqliteDatabase('recipes.db')


class Recipe(Model):
    name = CharField()
    created_at = DateTimeField(default=datetime.datetime.now)

    class Meta:
        database = DATABASE


class Ingredient(Model):
    name = CharField()
    description = CharField()
    quantity = DecimalField()
    measurement_type = CharField()
    recipe = ForeignKeyField(Recipe, backref='ingredients')

    class Meta:
        database = DATABASE

class Ingredient(Model):
    name = CharField()
    description = CharField()
    quantity = DecimalField()
    measurement_type = CharField()
    recipe = ForeignKeyField(Recipe, backref='ingredients')

    class Meta:
        database = DATABASE

resources/ingredients.py (second file)

from flask_restful import Resource

import models

Where is the mistake?

models.py 
import datetime

from peewee import *

DATABASE = SqliteDatabase('recipes.db')


class Recipe(Model):
    name = CharField()
    created_at = DateTimeField(default=datetime.datetime.now)

    class Meta:
        database = DATABASE

import datetime

from peewee import *

DATABASE = SqliteDatabase('recipes.db')


class Recipe(Model):
    name = CharField()
    created_at = DateTimeField(default=datetime.datetime.now)

    class Meta:
        database = DATABASE


class Ingredient(Model):
    name = CharField()
    description = CharField()
    quantity = DecimalField()
    measurement_type = CharField()
    recipe = ForeignKeyField(Recipe, backref='ingredients')

    class Meta:
        database = DATABASE

class Ingredient(Model):
    name = CharField()
    description = CharField()
    quantity = DecimalField()
    measurement_type = CharField()
    recipe = ForeignKeyField(Recipe, backref='ingredients')

    class Meta:
        database = DATABASE
resources/ingredients.py 
from flask_restful import Resource

import models
Dani Nanestean
Dani Nanestean
2,659 Points
Dani Nanestean
Dani Nanestean
2,659 Points

"I need your help to build an API for creating recipes. I have the recipe model done but we need one to represent each of the ingredients in a recipe.

Make a new Model named Ingredient. I've added comments to the models.py to describe the fields. Feel free to check the models and fields documenation if you need to. Don't forget to set the database attribute in the Meta class.

Thanks!"

This is what I have to do

3 Answers

Steven Parker
Steven Parker
231,533 Points
Steven Parker
Steven Parker
231,533 Points

In the code shown above, the class definition appears twice. Eliminate the duplicate.

But also, the video lesson example does not use the backref kwarg in the ForeignKeyField. Try leaving that out.

Dani Nanestean
Dani Nanestean
2,659 Points
Dani Nanestean
Dani Nanestean
2,659 Points

I made all the changes reported Always "Bummer: Try again!" keeps giving me

Rohald van Merode
seal-mask
.a{fill-rule:evenodd;}techdegree
Rohald van Merode
Treehouse Staff
Rohald van Merode
.a{fill-rule:evenodd;}techdegree
Rohald van Merode
Treehouse Staff

Hey Dani Nanestean 👋

I've just tried submitting your code after making the changes Steven suggested and your code seems to be passing fine on the first task after doing so. You'll want to make sure all the duplicate code in your snippets has been removed and remove the back reference (backref='ingredients') from the foreign key definition as Steven pointed out.

For your reference here is what should be left of your code after making the suggested adjustments: 

import datetime

from peewee import *

DATABASE = SqliteDatabase('recipes.db')


class Recipe(Model):
    name = CharField()
    created_at = DateTimeField(default=datetime.datetime.now)

    class Meta:
        database = DATABASE


class Ingredient(Model):
    name = CharField()
    description = CharField()
    quantity = DecimalField()
    measurement_type = CharField()
    recipe = ForeignKeyField(Recipe)

    class Meta:
        database = DATABASE

Hope this clears things up!

Dani Nanestean
Dani Nanestean
2,659 Points
Dani Nanestean
Dani Nanestean
2,659 Points

it's ok now, thank you very much! :)