Get Reverse relations object in rest framework - django

Question

How do I get the object from the reverse relation in serializers.py?
I have a model like this
class Post(models.Model):
title = models.CharField(max_length=100)
content = models.TextField()
def __str__(self):
return self.title
class Category(models.Model):
post = models.ForeignKey(Post, related_name='category')
name = models.CharField(max_length=200)
slug = models.SlugField(max_length=70, unique=False)
def __str__(self):
return self.title
And from the Django Rest Framework documentation, I can access the category directly through the related name and this is my serializers.py
class PostSerializer(serializers.ModelSerializer):
class Meta:
model = Post
fields = ('title','content','category')
The problem is the the view only return the category post id:
HTTP 200 OK
Vary: Accept
Allow: GET, HEAD, OPTIONS
Content-Type: application/json
{
"count": 1,
"next": null,
"previous": null,
"results": [
{
"title": "Post title 1",
"content": "test content..blah blah blah",
"category": [
1
]
}
]
}
How can I get the category name and slug??

Answer 1

The related_name will only return id's, and this is not wrong at all. If you want the full representation, you will also need to add a serialized version of each child object in your parent. Like this:
class PostSerializer(serializers.ModelSerializer):
category = CategorySerializer(many=True, required=False)
So you first need to have a CategorySerializer, and then you must add the relationship in the PostSerializer. All parameters are optional. Here is a small example.
P.S. : I suggest using 'categories' as related_name, since you can have more than just one.