Category API for products django-CodePudding

I have two models: Category, Products. And I want to create a separate url link like http://127.0.0.1:8000/api/categories/sneakers for each category to retrieve products from different urls. Using foreign key I can separate them but don't really know how to give them a url. Could you help me with this, please?

CodePudding user response：

You can do something like this:

As example:

Your models.py

class Category(models.Model):
    name = models.CharField(max_length=50, unique=True)
   
    def __str__(self):
        return self.name


class Product(models.Model):
    name = models.CharField(max_length=50, unique=True)
    price = models.IntegerField()
    brand = models.CharField(max_length=20)
    category = models.ForeignKey(Category, related_name='products', on_delete=models.CASCADE)
    barcode = models.IntegerField(default=None, validators=[MinValueValidator(10000000), MaxValueValidator(99999999)], unique=True)
    image = models.CharField(max_length=264)
    
    def __str__(self):
        return self.name

Your serializers.py

class ProductListSerializer(serializers.ModelSerializer):
    class Meta:
        model = Product
        fields = ('id', 'name')


class ProductDetailSerializer(serializers.ModelSerializer):
    class Meta:
        model = Product
        fields = ('id', 'name', 'price', 'brand', 'category', 'barcode', 'image')
        depth = 1


class CategoryListSerializer(serializers.ModelSerializer):
    class Meta:
        model = Category
        fields = ('id', 'name')


class CategoryDetailSerializer(serializers.ModelSerializer):
    products = ProductDetailSerializer(many=True)
    
    class Meta:
        model = Category
        fields = ('id', 'name', 'products')

Your views.py

class CategoryListAPIView(generics.ListAPIView):
    queryset = Category.objects.all()
    serializer_class = serializers.CategoryListSerializer


class CategoryDetailAPIView(generics.RetrieveAPIView):
    queryset = Category.objects.all()
    serializer_class = serializers.CategoryDetailSerializer
    lookup_field = 'name'
    
    
class ProductListAPIView(generics.ListAPIView):
    queryset = Product.objects.all()
    serializer_class = serializers.ProductListSerializer


class ProductDetailAPIView(generics.RetrieveAPIView):
    queryset = Product.objects.all()
    serializer_class = serializers.ProductDetailSerializer
    lookup_field = 'name'

Your urls.py

urlpatterns = [
    path('categories/', views.CategoryListAPIView.as_view(), name='category-list'),
    path('categories/<str:name>', views.CategoryDetailAPIView.as_view(), name='category-detail'),
    path('products/', views.ProductListAPIView.as_view(), name='product-list'),
    path('products/<str:name>', views.ProductDetailAPIView.as_view(), name='product-detail'),
]

CodePudding user response：

One solution is to register a URL with a placeholder that assigns part of the path to a variable:

# urls.py

urls = [
    path('api/categories/<string:category>', views.product_by_category, name=product_by_category)
]

Now django will send a category parameter to your view that you can use to get the products you want:

# views.py

def product_by_category(request, category):
    # get the products and serialize them as JSON or render a template to HTML
    pass

You will need to replace pass with the appropriate logic to return the correct response.