Complete primitive backend

django_backend/api/admin.py

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+from django.contrib import admin
+from django.contrib.contenttypes.admin import GenericTabularInline
+from users.models import User
+import nested_admin
+
+from api.models import *
+# Register your models here.
+
+class IngredientInline(nested_admin.NestedGenericTabularInline):
+    model = Ingredient
+    extra = 0
+
+class UserInline(nested_admin.NestedTabularInline):
+    model = User
+    fields = ("username",)
+    readonly_fields = ("username",)
+    extra = 0
+
+    def has_add_permission(self, request, obj=None):
+        return False
+
+    def has_delete_permission(self, request, obj=None):
+        return False
+
+class RecipeInline(nested_admin.NestedTabularInline):
+    model = Recipe
+    inlines = (IngredientInline,)
+    extra = 0
+
+@admin.register(Recipe)
+class RecipeAdmin(nested_admin.NestedModelAdmin):
+    list_display = ("name",)
+    inlines = (IngredientInline,)
+
+@admin.register(Homegroup)
+class HomegroupAdmin(nested_admin.NestedModelAdmin):
+    list_display = ("id", "name")
+    inlines = (UserInline, RecipeInline, IngredientInline)
+
+@admin.register(List)
+class ListAdmin(nested_admin.NestedModelAdmin):
+    list_display = ("id",)
+    inlines = (RecipeInline, IngredientInline)

django_backend/api/apps.py

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+from django.apps import AppConfig
+
+
+class ApiConfig(AppConfig):
+    default_auto_field = 'django.db.models.BigAutoField'
+    name = 'api'

django_backend/api/migrations/0001_initial.py

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+# Generated by Django 4.1.3 on 2022-11-22 20:42
+
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    initial = True
+
+    dependencies = [
+        ('contenttypes', '0002_remove_content_type_name'),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='Homegroup',
+            fields=[
+                ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+            ],
+        ),
+        migrations.CreateModel(
+            name='List',
+            fields=[
+                ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+            ],
+        ),
+        migrations.CreateModel(
+            name='Recipe',
+            fields=[
+                ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('name', models.CharField(max_length=50)),
+                ('homegroup', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='recipes', to='api.homegroup')),
+                ('list', models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.SET_NULL, related_name='recipes', to='api.list')),
+            ],
+        ),
+        migrations.CreateModel(
+            name='Ingredient',
+            fields=[
+                ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('object_id', models.PositiveBigIntegerField()),
+                ('name', models.CharField(max_length=50)),
+                ('in_stock', models.BooleanField(default=False)),
+                ('content_type', models.ForeignKey(limit_choices_to=models.Q(models.Q(('app_label', 'api'), ('model', 'recipe')), models.Q(('app_label', 'api'), ('model', 'list')), _connector='OR'), on_delete=django.db.models.deletion.CASCADE, to='contenttypes.contenttype')),
+            ],
+        ),
+    ]

django_backend/api/migrations/0002_homegroup_name.py

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+# Generated by Django 4.1.3 on 2022-11-22 21:43
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('api', '0001_initial'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='homegroup',
+            name='name',
+            field=models.CharField(default="Alex's Kitchen", max_length=50),
+            preserve_default=False,
+        ),
+    ]

django_backend/api/models.py

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+from django.db import models
+from django.contrib.contenttypes.models import ContentType
+from django.contrib.contenttypes.fields import GenericForeignKey, GenericRelation
+
+# Create your models here.
+class Ingredient(models.Model):
+    limit = models.Q(app_label="api", model="recipe") | models.Q(app_label="api", model="list")
+    content_type = models.ForeignKey(ContentType, limit_choices_to=limit, on_delete=models.CASCADE)
+    object_id = models.PositiveBigIntegerField()
+    content_object = GenericForeignKey()
+
+
+    name = models.CharField(max_length=50)
+    in_stock = models.BooleanField(default=False)
+
+class List(models.Model):
+    # Foreign Key Recipe -> List [as recipes]
+    extra_ingredients = GenericRelation(Ingredient, related_query_name="extra_ingredients")
+
+
+class Homegroup(models.Model):
+    # Foreign Key Recipe -> Homegroup [as recipes]
+    # Foreign Key User -> Homegroup [as users]
+    name = models.CharField(max_length=50)
+    
+
+class Recipe(models.Model):
+    name = models.CharField(max_length=50)
+    homegroup = models.ForeignKey(Homegroup, related_name="recipes", on_delete=models.CASCADE)
+    list = models.ForeignKey(List, related_name="recipes", on_delete=models.SET_NULL, blank=True, null=True)
+    ingredients = GenericRelation(Ingredient, related_query_name="ingredients")
+
+

django_backend/api/serializers.py

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+from rest_framework import serializers
+from api.models import *
+
+class RecipeSerializer(serializers.ModelSerializer):
+    ingredients = serializers.PrimaryKeyRelatedField(many=True, read_only=True)
+
+    class Meta:
+        model = Recipe
+        fields = ["id", "name", "ingredients"]
+        read_only_fields = ["id"]
+
+class IngredientSerializer(serializers.ModelSerializer):
+    class Meta:
+        model = Ingredient
+        fields = ["id", "name", "in_stock"]
+        read_only_fields = ["id"]
+
+class HomegroupSerializer(serializers.ModelSerializer):
+    users = serializers.PrimaryKeyRelatedField(many=True, read_only=True)
+    recipes = serializers.PrimaryKeyRelatedField(many=True, read_only=True)
+
+    class Meta:
+        model = Homegroup
+        fields = ["id", "recipes", "users"]

django_backend/api/tests.py

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+from django.test import TestCase
+
+# Create your tests here.

django_backend/api/urls.py

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+from django.urls import include, path
+from rest_framework import routers
+from api import views
+
+router = routers.DefaultRouter()
+router.register(r'recipes', views.RecipeView)
+router.register(r'ingredients', views.IngredientView)
+router.register(r'homegroups', views.HomegroupView)
+
+urlpatterns = [
+    path('', include(router.urls))
+]

django_backend/api/views.py

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+from rest_framework import viewsets
+
+from api.serializers import *
+from api.models import *
+
+class RecipeView(viewsets.ModelViewSet):
+    serializer_class = RecipeSerializer
+    queryset = Recipe.objects.all()
+
+class IngredientView(viewsets.ModelViewSet):
+    serializer_class = IngredientSerializer
+    queryset = Ingredient.objects.all()
+
+class HomegroupView(viewsets.ModelViewSet):
+    serializer_class = HomegroupSerializer
+    queryset = Homegroup.objects.all()