How to set category of every items inside the response in rest framework django?-CodePudding

I have two models like this:

class Category(models.Model):
    title = models.CharField(max_length=256)

class Post(models.Model):
    title = models.CharField(max_length=256, default=None, blank=True)
    content = models.TextField()
    created_at = models.DateTimeField(auto_now=True)
    category_id = models.ForeignKey(Category, on_delete=models.CASCADE)

And have two serializer:

class CategorySerializer(serializers.HyperlinkedModelSerializer):
    class Meta:
        model = Category
        fields = ['id', 'title']

class PostSerializer(serializers.ModelSerializer):
    class Meta:
        model = Post
        fields = ['id', 'title', 'content', 'created_at', 'category_id']

How to prepare response like this:

"data": [
        {
            "id": 1,
            "title": "Hello1",
            "content": "Hello content1",
            "created_at": "2021-09-25T07:57:23.532416Z",
            "category_id": 11,
            "category": {"id":11 , "title":"Category1"}
        },
        {
            "id": 2,
            "title": "Hello2",
            "content": "Hello content2",
            "created_at": "2021-09-25T08:08:37.984310Z",
            "category_id": 12,
            "category": {"id":12 , "title":"Category2"}
        }
    ]

CodePudding user response：

You add a Category sub-serializer:

class PostSerializer(serializers.ModelSerializer):
    category = CategorySerializer()
    
    class Meta:
        model = Post
        fields = ['id', 'title', 'content', 'created_at', 'category', 'category_id']