Ingredients API, test, CRUD, model, views & serializers

README.md

@@ -1853,5 +1853,6 @@ Ruta `localhost:8000/api/docs`
 
 ----
 
-- Segunda parte -> [Recetas](./README2.md)
-- Tercera parte -> [Tags](./README3.md)
+- 2da parte -> [Recetas](./README2.md)
+- 3ra parte -> [Tags](./README3.md)
+- 4ta parte -> [Ingredientes](./README4.md)

README2.md

@@ -539,5 +539,6 @@ URL `localhost:8000/api/docs/`
 
 ----
 
-- Primera parte -> [Recepi API](./README.md)
-- Tercera parte -> [Tags](./README3.md)
+- 1ra parte -> [Recepi API](./README.md)
+- 3ra parte -> [Tags](./README3.md)
+- 4ta parte -> [Ingredientes](./README4.md)

README3.md

@@ -1,11 +1,11 @@
 # Tags API
 
-- Añadir capadidad de agregar **tags** a las recetas
+- Añadir capacidad de agregar **tags** a las recetas
 - Creación del modelo para los **tags**
 - Añadir *endpoints* para la API **tag**
-- Actualizar el *endpoint* **recipe**, para agregar y listar tags
+- Actualizar **recipe** *endpoint*, para agregar y listar tags
 
-## Tag endpoint
+## Endpoints
 
 - `/api/recipe/tags`
 
@@ -514,3 +514,9 @@ URL `localhost:8000/api/docs`
 ### Django Admin
 
 ![img](./imgs_readme/django_admin_14.png)
+
+----
+
+- 1ra parte -> [Recepi API](./README.md)
+- 2da parte -> [Recetas](./README2.md)
+- 4ta parte -> [Ingredientes](./README4.md)

README4.md

@@ -0,0 +1,514 @@
+# Igredientes API
+
+- Añadir capacidad de agregar **ingredientes** a las recetas
+- Creación del modelo para los **ingredientes**
+- Añadir API *endpoints* para los **ingredientes**
+- Actualizar **recipe** *endpoint*, para agregar y listar ingredientes
+
+## Endpoints
+
+- `/api/recipe/ingredients`
+
+   | Método HTTP | Función |
+   | - | - |
+   | `GET` | Listar ingredientes |
+
+- `/api/recipe/ingredients/<id>`
+
+   | Método HTTP | Función |
+   | - | - |
+   | `GET` | Obtener detalles del ingrediente |
+   | `PUT/PATCH` | Actualizar ingrediente |
+   | `DELETE` | Borrar ingrediente |
+
+- `/api/recipe`
+
+   | Método HTTP | Función |
+   | - | - |
+   | `POST`| Crear ingrediente (como parte de una receta) |
+
+- `/api/recipe/<id>`
+
+   | Método HTTP | Función |
+   | - | - |
+   | `PUT/PATCH` | Crear o modificar ingredientes |
+
+## Test Tag Model
+
+[`tests/test_models.py`](./app/core/tests/test_models.py)
+
+```py
+    ...
+
+    def test_create_ingredient(self):
+        """Test creating an ingredient is successful."""
+        user = create_user()
+        ingredient = models.Ingredient.objects.create(
+            user=user,
+            name='Ingrediente1'
+        )
+
+        self.assertEqual(str(ingredient), ingredient.name)
+```
+
+## Ingredients Model
+
+- `name` Nombre del ingrediente a crear
+- `user` Usuario creador/dueño del ingrediente
+
+[`core/models.py`](./app/core/models.py)
+
+```py
+...
+
+class Recipe(models.Model):
+    ...
+    ingredients = models.ManyToManyField('Ingredient')
+    ...
+
+class Ingredient(models.Model):
+    """Ingredient for recipes."""
+    name = models.CharField(max_length=255)
+    user = models.ForeignKey(
+        settings.AUTH_USER_MODEL,
+        on_delete=models.CASCADE,
+    )
+
+    def __str__(self):
+        return self.name
+```
+
+### Crear migraciones
+
+`docker compose run --rm app sh -c python manage.py makemigrations`
+
+```sh
+[+] Creating 1/0
+ ✔ Container recipes_api_django-db-1  Running  0.0s
+Migrations for 'core':
+  core/migrations/0004_ingredient_recipe_ingredients.py
+    - Create model Ingredient
+    - Add field ingredients to recipe
+```
+
+### Agregar al administrador de django
+
+[`app/core/admin.py`](./app/core/admin.py)
+
+```py
+admin.site.register(models.Ingredient)
+```
+
+## Test para listar ingredientes
+
+[`tests/test_ingredients_api.py`](./app/core/tests/test_ingredients_api.py)
+
+```py
+...
+
+def create_user(email='user@example.com', password='testpass123'):
+    """Create and return user."""
+    return get_user_model().objects.create_user(email=email, password=password)
+
+
+class PublicIngredientsApiTests(TestCase):
+    """Test unanthenticated API requests."""
+
+    def setUp(self):
+        self.client = APIClient()
+
+    def test_auth_required(self):
+        """Test auth is required for retrieving ingredients."""
+        res = self.client.get(INGREDIENTS_URL)
+
+        self.assertEqual(res.status_code, status.HTTP_401_UNAUTHORIZED)
+
+class PrivateIngredientsApiTests(TestCase):
+    """Test authenticated API requests."""
+
+    def setUp(self):
+        self.user = create_user()
+        self.client = APIClient()
+        self.client.force_authenticate(self.user)
+
+    def test_retrieve_ingredients(self):
+        """Test retrieving a list of ingredients."""
+        Ingredient.objects.create(user=self.user, name='Harina')
+        Ingredient.objects.create(user=self.user, name='Panela')
+
+        res = self.client.get(INGREDIENTS_URL)
+
+        ingredients = Ingredient.objects.all().order_by('-name')
+        serializer = IngredientSerializer(ingredients, many=True)
+
+        self.assertEqual(res.status_code, status.HTTP_200_OK)
+        self.assertEqual(res.data, serializer.data)
+
+    def test_ingredients_limited_to_user(self):
+        """Test list of ingredients is limited to authenticated user."""
+        user2 = create_user(email='user2@example.com')
+        Ingredient.objects.create(user=user2, name='Sal')
+        ingredient = Ingredient.objects.create(user=self.user, name='Pimienta')
+
+        res = self.client.get(INGREDIENTS_URL)
+
+        self.assertEqual(res.status_code, status.HTTP_200_OK)
+        self.assertEqual(len(res.data), 1)
+        self.assertEqual(res.data[0]['name'], ingredient.name)
+        self.assertEqual(res.data[0]['id'], ingredient.id)
+```
+
+### Serializador Ingredientes
+
+[`recipe/serializers.py`](./app/recipe/serializers.py)
+
+```py
+...
+
+class RecipeSerializer(serializers.ModelSerializer):
+    """Serializer for recipes."""
+    tags = TagSerializer(many=True, required=False)
+
+    class Meta:
+        model = Recipe
+        fields = ['id', 'title', 'time_minutes', 'price', 'link', 'tags']
+        read_only_fields = ['id']
+
+...
+```
+
+### Vistas Ingredients
+
+[`recipe/views.py`](./app/recipe/views.py)
+
+```py
+class IngredientViewSet(mixin.ListModelMixin, viewsets.GenericViewSet):
+    """Manage ingredients in the database."""
+    serializer_class = serializers.IngredientSerializer
+    queryset = Ingredient.objects.all()
+    authentication_classes = [TokenAuthentication]
+    permission_classes = [IsAuthenticated]
+
+    def get_queryset(self):
+        """Filter queryset to authenticated user."""
+        return self.queryset.filter(user=self.request.user).order_by('-name')
+```
+
+### URls Ingredientes
+
+[recipe/urls.py](./app/recipe/urls.py)
+
+```py
+...
+router.register('ingredients', views.IngredientViewSet)
+
+...
+```
+
+## Actualizar Ingredientes
+
+### Test actualizar ingredientes
+
+[`recipe/tests/test_ingredients_api.py`](./app/recipe/tests/test_ingredients_api.py)
+
+```py
+...
+def detail_url(ingredient_id):
+    """Create and return an ingredient detail URL."""
+    return reverse('recipe:ingredient-detail', args=[ingredient_id])
+
+    ...
+
+    def test_update_ingredient(self):
+        """Test updating an ingredient."""
+        ingredient = Ingredient.objects.create(user=self.user, name='Coriandro')
+
+        payload = {'name': 'Cilantro'}
+        url = detail_url(ingredient.id)
+        res = self.client.patch(url, payload)
+
+        self.assertEqual(res.status_code, status.HTTP_200_OK)
+        ingredient.refresh_from_db()
+        self.assertEqual(ingredient.name, payload['name'])
+```
+
+### Implementar funcionalidad actualizar ingredientes
+
+[`recipe/views.py`](./app/recipe/views.py)
+
+```diff
+-class IngredientViewSet(mixins.ListModelMixin, viewsets.GenericViewSet):
++class IngredientViewSet(mixins.UpdateModelMixin,
++                        mixins.ListModelMixin,
++                        viewsets.GenericViewSet):
+```
+
+## Eliminar ingredientes
+
+### Test eliminar ingredientes
+
+[`test_ingredients_api.py`](./app/recipe/tests/test_ingredients_api.py)
+
+```py
+    def test_delete_ingredient(self):
+        """Test deleting an ingredient."""
+        ingredient = Ingredient.objects.create(user=self.user, name='Lechuga')
+
+        url = detail_url(ingredient.id)
+        res = self.client.delete(url)
+
+        self.assertEqual(res.status_code, status.HTTP_204_NO_CONTENT)
+        ingredients = Ingredient.objects.filter(user=self.user)
+        self.assertFalse(ingredients.exists())
+```
+
+### Implementar funcionalidad actualizar ingredientes
+
+[`recipe/views.py`](./app/recipe/views.py)
+
+```diff
+-class IngredientViewSet(
++class IngredientViewSet(mixins.DestroyModelMixin,
++                        mixins.UpdateModelMixin,
+                         mixins.ListModelMixin,
+                         viewsets.GenericViewSet):
+```
+
+## Creación de ingredientes
+
+### Test crear ingrediente
+
+[`test_recipe_api.py`](./app/recipe/tests/test_recipe_api.py)
+
+```py
+    def test_create_recipe_with_new_ingredients(self):
+        """Test creating a recipe with new ingredients."""
+        payload = {
+            'title': 'Camarones acaramelados',
+            'time_minutes': 45,
+            'price': Decimal('75.50'),
+            'ingredients': [{'name': 'Camarones'}, {'name': 'Azucar'}],
+        }
+        res = self.client.post(RECIPES_URL, payload, format='json')
+
+        self.assertEqual(res.status_code, status.HTTP_201_CREATED)
+        recipes = Recipe.objects.filter(user=self.user)
+        self.assertEqual(recipe.ingredients.count(), 2)
+        for ingredient in payload['ingredients']:
+            exists = recipe.ingredients.filter(
+                name=ingredient['name'],
+                user=self.user,
+            ).exists()
+            self.assertTrue(exists)
+
+    def test_create_recipe_with_existing_ingredient(self):
+        """Test creating a new recipe with existing ingredient."""
+        ingredient = Ingredient.objects.create(user=self.user, name='Limón')
+        payload = {
+            'title': 'Limonada',
+            'time_minutes': 15,
+            'price': '2.50',
+            'ingredients': [{'name': 'Limón'}, {'name': 'Azucar'}],
+        }
+        res = self.client.post(RECIPES_URL, payload, format='json')
+
+        self.assertEqual(res.status_code, status.HTTP_201_CREATED)
+        recipes = Recipe.objects.filter(user=self.user)
+        self.assertEqual(recipes.count(), 1)
+        recipe = recipes[0]
+        self.assertEqual(recipe.ingredients.count(), 2)
+        self.assertIn(ingredient, recipe.ingredients.all())
+        for ingredient in payload['ingredients']:
+            exists = recipe.ingredients.filter(
+                name=ingredient['name'],
+                user=self.user,
+            ).exists()
+            self.assertTrue(exists)
+```
+
+### Implementación funcionalidad crear ingredientes con receta
+
+[`recipe/serializers.py`](./app/recipe/serializers.py)
+
+```diff
+...
+class RecipeSerializer(serializers.ModelSerializer):
+    """Serializer for recipes."""
+    tags = TagSerializer(many=True, required=False)
++   ingredients = IngredientSerializer(many=True)
+
+    class Meta:
+        model = Recipe
+-      fields = ['id', 'title', 'time_minutes', 'price', 'link', 'tags']
++      fields = ['id', 'title', 'time_minutes', 'price', 'link', 'tags',
++                'ingredients']
+        read_only_fields = ['id']
+
+    ...
+
++   def _get_or_create_ingredients(self, ingredients, recipe):
++       """Handle getting or creating ingredients as needed."""
++       auth_user = self.context['request'].user
++       for ingredient in ingredients:
++           ingredient_obj, created = Ingredient.objects.get_or_create(
++               user=auth_user,
++               **ingredient,
++           )
++           recipe.ingredients.add(ingredient_obj)
+
+    def create(self, validated_data):
+        """Create a recipe."""
+        tags = validated_data.pop('tags', [])
++       ingredients = validated_data.pop('ingredients', [])
+        recipe = Recipe.objects.create(**validated_data)
+        self._get_or_create_tags(tags, recipe)
++       self._get_or_create_ingredients(ingredients, recipe)
+
+    ...
+```
+
+## Actualizar ingredientes
+
+### Test actaulizar ingredientes
+
+[`recipe/tests/test_ingredients_api.py`](./app/recipe/tests/test_ingredients_api.py)
+
+```py
+    def test_create_ingredient_on_update(self):
+        """Test creating an ingredient when updating a recipe."""
+        recipe = create_recipe(user=self.user)
+
+        payload = {'ingredients': [{'name': 'Pomelo'}]}
+        url = detail_url(recipe.id)
+        res = self.client.patch(url, payload, format='json')
+
+        self.assertEqual(res.status_code, status.HTTP_200_OK)
+        new_ingredient = Ingredient.objects.get(user=self.user, name='Pomelo')
+        self.assertIn(new_ingredient, recipe.ingredients.all())
+
+    def test_update_recipe_assign_ingredient(self):
+        """Test assigning an existing ingredient when updating a recipe."""
+        ingredient1 = Ingredient.objects.create(user=self.user, name='Pimienta')
+        recipe = create_recipe(user=self.user)
+        recipe.ingredients.add(ingredient1)
+
+        ingredient2 = Ingredient.objects.create(user=self.user, name='Ají')
+        payload = {'ingredients': [{'name': 'Ají'}]}
+        url = detail_url(recipe.id)
+        res = self.client.patch(url,payload, format='json')
+
+        self.assertEqual(res.status_code, status.HTTP_200_OK)
+        self.assertIn(ingredient2, recipe.ingredients.all())
+        self.assertNotIn(ingredient1, recipe.ingredients.all())
+
+    def test_clear_recipe_ingredients(self):
+        """Test clearing a recipes ingredients."""
+        ingredient = Ingredient.objects.create(user=self.user, name='Ajo')
+        recipe = create_recipe(user=self.user)
+        recipe.ingredients.add(ingredient)
+
+        payload = {'ingredients': []}
+        url = detail_url(recipe.id)
+        res = self.client.patch(url, payload, format='json')
+
+        self.assertEqual(res.status_code, status.HTTP_200_OK)
+        self.assertEqual(recipe.ingredients.count(), 0)
+```
+
+### Implementación actualizar ingredientes
+
+[`recipe/serializers.py`](./app/recipe/serializers.py)
+
+```diff
+    def create(self, validated_data):
+        """Create a recipe."""
+        tags = validated_data.pop('tags', [])
++       ingredients = validated_data.pop('ingredients', [])
+        recipe = Recipe.objects.create(**validated_data)
+        self._get_or_create_tags(tags, recipe)
++       self._get_or_create_ingredients(ingredients, recipe)
+
+        return recipe
+
+    def update(self, instance, validated_data):
+        """Update recipe."""
+        tags = validated_data.pop('tags', None)
++       ingredients = validated_data.pop('ingredients', None)
+        if tags is not None:
+            instance.tags.clear()
+            self._get_or_create_tags(tags, instance)
++       if ingredients is not None:
++           instance.ingredients.clear()
++           self._get_or_create_ingredients(ingredients, instance)
+```
+
+## Refactor
+
+Reestructuración para falicitar lectura, eficiencia y evita código duplicado
+y mejorar rendimiento
+
+TDD facilita esta labor, corriendo los tests para evaluar
+
+### Area a refactorizar
+
+`TagViewSet/IngredientViewSet` Código muy similar, refactorización usando
+herencia
+
+[`recipe/views.py`](./app/recipe/views.py)
+
+```diff
++  class BaseRecipeAtrrViewSet(mixins.DestroyModelMixin,
++                              mixins.UpdateModelMixin,
++                              mixins.ListModelMixin,
++                              viewsets.GenericViewSet):
++      """Base viewset for recipe attributes."""
++      authentication_classes = [TokenAuthentication]
++      permission_classes = [IsAuthenticated]
+
++      def get_queryset(self):
++          """Filter queryset to authenticated user."""
++          return self.queryset.filter(user=self.request.user).order_by('-name')
+
+
+   class TagViewSet(BaseRecipeAtrrViewSet):
+       """Manage tags in the database."""
+       serializer_class = serializers.TagSerializer
+       queryset = Tag.objects.all()
+-       authentication_classes = [TokenAuthentication]
+-       permission_classes = [IsAuthenticated]
+
+-       def get_queryset(self):
+-           """Filter queryset to authenticated user."""
+-           return self.queryset.filter(user=self.request.user).order_by('-name')
+
+
+   class IngredientViewSet(BaseRecipeAtrrViewSet):
+       """Manage ingredients in the database."""
+       serializer_class = serializers.IngredientSerializer
+       queryset = Ingredient.objects.all()
+-      authentication_classes = [TokenAuthentication]
+-      permission_classes = [IsAuthenticated]
+
+-      def get_queryset(self):
+-          """Filter queryset to authenticated user."""
+-          return self.queryset.filter(user=self.request.user).order_by('-name')
+```
+
+## Levantar app y prueba navegador
+
+- `docker compose run`
+- URL `localhost:8000/api/docs`
+
+### Swagger
+
+![img](./imgs_readme/api_swagger_03.png)
+
+### Django Admin
+
+![img](./imgs_readme/django_admin_15.png)
+
+----
+
+- 1ra parte -> [Recepi API](./README.md)
+- 2da parte -> [Recetas](./README2.md)
+- 3ra parte -> [Tags](./README2.md)

app/core/admin.py

@@ -46,3 +46,4 @@ class UserAdmin(BaseUserAdmin):
 admin.site.register(models.User, UserAdmin)
 admin.site.register(models.Recipe)
 admin.site.register(models.Tag)
+admin.site.register(models.Ingredient)

app/core/migrations/0004_ingredient_recipe_ingredients.py

@@ -0,0 +1,28 @@
+# Generated by Django 4.2.5 on 2023-10-10 20:04
+
+from django.conf import settings
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('core', '0003_tag_recipe_tags'),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='Ingredient',
+            fields=[
+                ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('name', models.CharField(max_length=255)),
+                ('user', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to=settings.AUTH_USER_MODEL)),
+            ],
+        ),
+        migrations.AddField(
+            model_name='recipe',
+            name='ingredients',
+            field=models.ManyToManyField(to='core.ingredient'),
+        ),
+    ]

app/core/models.py

@@ -57,6 +57,7 @@ class Recipe(models.Model):
     price = models.DecimalField(max_digits=5, decimal_places=2, blank=True)
     link = models.CharField(max_length=255, blank=True)
     tags = models.ManyToManyField('Tag')
+    ingredients = models.ManyToManyField('Ingredient')
 
     def __str__(self):
         return self.title
@@ -72,3 +73,15 @@ class Tag(models.Model):
 
     def __str__(self):
         return self.name
+
+
+class Ingredient(models.Model):
+    """Ingredient for recipes."""
+    name = models.CharField(max_length=255)
+    user = models.ForeignKey(
+        settings.AUTH_USER_MODEL,
+        on_delete=models.CASCADE,
+    )
+
+    def __str__(self):
+        return self.name

app/core/tests/test_models.py

@@ -17,8 +17,8 @@ def create_user(email='user@example.com', password='testpass123'):
 class ModelTests(TestCase):
     """Test models."""
 
-    def test_create_user_with_email_sucessfull(self):
-        """Test creating a user with an email is sucessfull."""
+    def test_create_user_with_email_successful(self):
+        """Test creating a user with an email is successful."""
         email = 'test@example.com'
         password = 'testpass123'
         user = create_user(email, password)
@@ -65,8 +65,18 @@ class ModelTests(TestCase):
         self.assertEqual(str(recipe), recipe.title)
 
     def test_create_tag(self):
-        """Test creating a tag is sucessfull."""
+        """Test creating a tag is successful."""
         user = create_user()
         tag = models.Tag.objects.create(user=user, name='Tag1')
 
         self.assertEqual(str(tag), tag.name)
+
+    def test_create_ingredient(self):
+        """Test creating an ingredient is successful."""
+        user = create_user()
+        ingredient = models.Ingredient.objects.create(
+            user=user,
+            name='Ingrediente1'
+        )
+
+        self.assertEqual(str(ingredient), ingredient.name)

app/recipe/serializers.py

@@ -4,11 +4,21 @@ Serializers for recipe APIs
 from rest_framework import serializers
 
 from core.models import (
+    Ingredient,
     Recipe,
     Tag,
 )
 
 
+class IngredientSerializer(serializers.ModelSerializer):
+    """Serializer for Ingredients."""
+
+    class Meta:
+        model = Ingredient
+        fields = ['id', 'name']
+        read_only_fields = ['id']
+
+
 class TagSerializer(serializers.ModelSerializer):
     """Serializer for tags."""
 
@@ -21,10 +31,12 @@ class TagSerializer(serializers.ModelSerializer):
 class RecipeSerializer(serializers.ModelSerializer):
     """Serializer for recipes."""
     tags = TagSerializer(many=True, required=False)
+    ingredients = IngredientSerializer(many=True, required=False)
 
     class Meta:
         model = Recipe
-        fields = ['id', 'title', 'time_minutes', 'price', 'link', 'tags']
+        fields = ['id', 'title', 'time_minutes', 'price', 'link', 'tags',
+                  'ingredients']
         read_only_fields = ['id']
 
     def _get_or_create_tags(self, tags, recipe):
@@ -37,20 +49,36 @@ class RecipeSerializer(serializers.ModelSerializer):
             )
             recipe.tags.add(tag_obj)
 
+    def _get_or_create_ingredients(self, ingredients, recipe):
+        """Handle getting or creating ingredients as needed."""
+        auth_user = self.context['request'].user
+        for ingredient in ingredients:
+            ingredient_obj, created = Ingredient.objects.get_or_create(
+                user=auth_user,
+                **ingredient,
+            )
+            recipe.ingredients.add(ingredient_obj)
+
     def create(self, validated_data):
         """Create a recipe."""
         tags = validated_data.pop('tags', [])
+        ingredients = validated_data.pop('ingredients', [])
         recipe = Recipe.objects.create(**validated_data)
         self._get_or_create_tags(tags, recipe)
+        self._get_or_create_ingredients(ingredients, recipe)
 
         return recipe
 
     def update(self, instance, validated_data):
         """Update recipe."""
         tags = validated_data.pop('tags', None)
+        ingredients = validated_data.pop('ingredients', None)
         if tags is not None:
             instance.tags.clear()
             self._get_or_create_tags(tags, instance)
+        if ingredients is not None:
+            instance.ingredients.clear()
+            self._get_or_create_ingredients(ingredients, instance)
 
         for attr, value in validated_data.items():
             setattr(instance, attr, value)

app/recipe/tests/test_ingredients_api.py

@@ -0,0 +1,99 @@
+"""
+Tests for the ingredients API.
+"""
+from django.contrib.auth import get_user_model
+from django.urls import reverse
+from django.test import TestCase
+
+from rest_framework import status
+from rest_framework.test import APIClient
+
+from core.models import Ingredient
+
+from recipe.serializers import IngredientSerializer
+
+
+INGREDIENTS_URL = reverse('recipe:ingredient-list')
+
+
+def detail_url(ingredient_id):
+    """Create and return an ingredient detail URL."""
+    return reverse('recipe:ingredient-detail', args=[ingredient_id])
+
+
+def create_user(email='user@example.com', password='testpass123'):
+    """Create and return user."""
+    return get_user_model().objects.create_user(email=email, password=password)
+
+
+class PublicIngredientsApiTests(TestCase):
+    """Test unanthenticated API requests."""
+
+    def setUp(self):
+        self.client = APIClient()
+
+    def test_auth_required(self):
+        """Test auth is required for retrieving ingredients."""
+        res = self.client.get(INGREDIENTS_URL)
+
+        self.assertEqual(res.status_code, status.HTTP_401_UNAUTHORIZED)
+
+
+class PrivateIngredientsApiTests(TestCase):
+    """Test authenticated API requests."""
+
+    def setUp(self):
+        self.user = create_user()
+        self.client = APIClient()
+        self.client.force_authenticate(self.user)
+
+    def test_retrieve_ingredients(self):
+        """Test retrieving a list of ingredients."""
+        Ingredient.objects.create(user=self.user, name='Harina')
+        Ingredient.objects.create(user=self.user, name='Panela')
+
+        res = self.client.get(INGREDIENTS_URL)
+
+        ingredients = Ingredient.objects.all().order_by('-name')
+        serializer = IngredientSerializer(ingredients, many=True)
+
+        self.assertEqual(res.status_code, status.HTTP_200_OK)
+        self.assertEqual(res.data, serializer.data)
+
+    def test_ingredients_limited_to_user(self):
+        """Test list of ingredients is limited to authenticated user."""
+        user2 = create_user(email='user2@example.com')
+        Ingredient.objects.create(user=user2, name='Sal')
+        ingredient = Ingredient.objects.create(user=self.user, name='Pimienta')
+
+        res = self.client.get(INGREDIENTS_URL)
+
+        self.assertEqual(res.status_code, status.HTTP_200_OK)
+        self.assertEqual(len(res.data), 1)
+        self.assertEqual(res.data[0]['name'], ingredient.name)
+        self.assertEqual(res.data[0]['id'], ingredient.id)
+
+    def test_update_ingredient(self):
+        """Test updating an ingredient."""
+        ingredient = Ingredient.objects.create(
+            user=self.user, name='Coriandro'
+        )
+
+        payload = {'name': 'Cilantro'}
+        url = detail_url(ingredient.id)
+        res = self.client.patch(url, payload)
+
+        self.assertEqual(res.status_code, status.HTTP_200_OK)
+        ingredient.refresh_from_db()
+        self.assertEqual(ingredient.name, payload['name'])
+
+    def test_delete_ingredient(self):
+        """Test deleting an ingredient."""
+        ingredient = Ingredient.objects.create(user=self.user, name='Lechuga')
+
+        url = detail_url(ingredient.id)
+        res = self.client.delete(url)
+
+        self.assertEqual(res.status_code, status.HTTP_204_NO_CONTENT)
+        ingredients = Ingredient.objects.filter(user=self.user)
+        self.assertFalse(ingredients.exists())

app/recipe/tests/test_recipe_api.py

@@ -13,6 +13,7 @@ from rest_framework.test import APIClient
 from core.models import (
         Recipe,
         Tag,
+        Ingredient,
 )
 
 from recipe.serializers import (
@@ -295,3 +296,91 @@ class PrivateRecipeApiTests(TestCase):
 
         self.assertEqual(res.status_code, status.HTTP_200_OK)
         self.assertEqual(recipe.tags.count(), 0)
+
+    def test_create_recipe_with_new_ingredients(self):
+        """Test creating a recipe with new ingredients."""
+        payload = {
+            'title': 'Camarones acaramelados',
+            'time_minutes': 45,
+            'price': Decimal('75.50'),
+            'ingredients': [{'name': 'Camarones'}, {'name': 'Azucar'}],
+        }
+        res = self.client.post(RECIPES_URL, payload, format='json')
+
+        self.assertEqual(res.status_code, status.HTTP_201_CREATED)
+        recipes = Recipe.objects.filter(user=self.user)
+        self.assertEqual(recipes.count(), 1)
+        recipe = recipes[0]
+        self.assertEqual(recipe.ingredients.count(), 2)
+        for ingredient in payload['ingredients']:
+            exists = recipe.ingredients.filter(
+                name=ingredient['name'],
+                user=self.user,
+            ).exists()
+            self.assertTrue(exists)
+
+    def test_create_recipe_with_existing_ingredient(self):
+        """Test creating a new recipe with existing ingredient."""
+        ingredient = Ingredient.objects.create(user=self.user, name='Limón')
+        payload = {
+            'title': 'Limonada',
+            'time_minutes': 15,
+            'price': '2.50',
+            'ingredients': [{'name': 'Limón'}, {'name': 'Azucar'}],
+        }
+        res = self.client.post(RECIPES_URL, payload, format='json')
+
+        self.assertEqual(res.status_code, status.HTTP_201_CREATED)
+        recipes = Recipe.objects.filter(user=self.user)
+        self.assertEqual(recipes.count(), 1)
+        recipe = recipes[0]
+        self.assertEqual(recipe.ingredients.count(), 2)
+        self.assertIn(ingredient, recipe.ingredients.all())
+        for ingredient in payload['ingredients']:
+            exists = recipe.ingredients.filter(
+                name=ingredient['name'],
+                user=self.user,
+            ).exists()
+            self.assertTrue(exists)
+
+    def test_create_ingredient_on_update(self):
+        """Test creating an ingredient when updating a recipe."""
+        recipe = create_recipe(user=self.user)
+
+        payload = {'ingredients': [{'name': 'Pomelo'}]}
+        url = detail_url(recipe.id)
+        res = self.client.patch(url, payload, format='json')
+
+        self.assertEqual(res.status_code, status.HTTP_200_OK)
+        new_ingredient = Ingredient.objects.get(user=self.user, name='Pomelo')
+        self.assertIn(new_ingredient, recipe.ingredients.all())
+
+    def test_update_recipe_assign_ingredient(self):
+        """Test assigning an existing ingredient when updating a recipe."""
+        ingredient1 = Ingredient.objects.create(
+            user=self.user, name='Pimienta'
+        )
+        recipe = create_recipe(user=self.user)
+        recipe.ingredients.add(ingredient1)
+
+        ingredient2 = Ingredient.objects.create(user=self.user, name='Ají')
+        payload = {'ingredients': [{'name': 'Ají'}]}
+        url = detail_url(recipe.id)
+        res = self.client.patch(url, payload, format='json')
+
+        self.assertEqual(res.status_code, status.HTTP_200_OK)
+        self.assertIn(ingredient2, recipe.ingredients.all())
+        self.assertNotIn(ingredient1, recipe.ingredients.all())
+
+    def test_clear_recipe_ingredients(self):
+        """Test clearing a recipes ingredients."""
+        ingredient = Ingredient.objects.create(user=self.user, name='Ajo')
+        recipe = create_recipe(user=self.user)
+        recipe.ingredients.add(ingredient)
+
+        payload = {'ingredients': []}
+        url = detail_url(recipe.id)
+        res = self.client.patch(url, payload, format='json')
+
+        self.assertEqual(res.status_code, status.HTTP_200_OK)
+        self.assertEqual(recipe.ingredients.count(), 0)

app/recipe/urls.py

@@ -14,6 +14,7 @@ from recipe import views
 router = DefaultRouter()
 router.register('recipes', views.RecipeViewSet)
 router.register('tags', views.TagViewSet)
+router.register('ingredients', views.IngredientViewSet)
 
 app_name = 'recipe'
 

app/recipe/views.py

@@ -9,6 +9,7 @@ from rest_framework.authentication import TokenAuthentication
 from rest_framework.permissions import IsAuthenticated
 
 from core.models import (
+    Ingredient,
     Recipe,
     Tag,
 )
@@ -37,16 +38,26 @@ class RecipeViewSet(viewsets.ModelViewSet):
         serializer.save(user=self.request.user)
 
 
-class TagViewSet(mixins.DestroyModelMixin,
-                 mixins.UpdateModelMixin,
-                 mixins.ListModelMixin,
-                 viewsets.GenericViewSet):
-    """Manage tags in the database."""
-    serializer_class = serializers.TagSerializer
-    queryset = Tag.objects.all()
+class BaseRecipeAtrrViewSet(mixins.DestroyModelMixin,
+                            mixins.UpdateModelMixin,
+                            mixins.ListModelMixin,
+                            viewsets.GenericViewSet):
+    """Base viewset for recipe attributes."""
     authentication_classes = [TokenAuthentication]
     permission_classes = [IsAuthenticated]
 
     def get_queryset(self):
         """Filter queryset to authenticated user."""
         return self.queryset.filter(user=self.request.user).order_by('-name')
+
+
+class TagViewSet(BaseRecipeAtrrViewSet):
+    """Manage tags in the database."""
+    serializer_class = serializers.TagSerializer
+    queryset = Tag.objects.all()
+
+
+class IngredientViewSet(BaseRecipeAtrrViewSet):
+    """Manage ingredients in the database."""
+    serializer_class = serializers.IngredientSerializer
+    queryset = Ingredient.objects.all()