Issue with serializer and api-CodePudding

My problem is that I want to to get category.name instead of category.id in api.

class PostSerializer(serializers.ModelSerializer):

 
 class Meta:
     model = models.Post
     fields = ['id', 'title', 'content', 'category', 'img', 'date_posted']

But when I adding it, there disappears option in POST method to set category. For api view I use generics.ListCreateAPIView

  def getCategory(self,obj):
       return obj.category.name

  category = serializers.SerializerMethodField("getCategory")

CodePudding user response：

you can do it in the following way

class PostSerializer(serializers.ModelSerializer):
   category_name = serializer.SerializerMethodField()
 
   class Meta:
       model = models.Post
       fields = ['id', 'title', 'content', 'category', 'img', 
       'date_posted','category_name ']

   def get_category_name(self,obj):
        return obj.category.name

CodePudding user response：

You can work with a SlugRelatedField ^[Django-doc] that takes the name of the Category as data:

class PostSerializer(serializers.ModelSerializer):
    category = serializers.SlugRelatedField(
        slug_field='name',
        queryset=Category.objects.all()
    )
 
    class Meta:
        model = models.Post
        fields = ['id', 'title', 'content', 'category', 'img', 'date_posted']

The advantage of this is that this works bi-directional: if the name of a category is unique=True, then that means you can also use the PostSerializer to create a Post and specify the name of the category in the POST request.