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I have used django-mptt to store categories hierarchy and I need to serialize all category data in below format.
{
"id": 1,
"name": "FOOD"
"children": [
{
"id": 6,
"name": "PIZZA"
},
{
"id": 7,
"name": "BURGER"
}
],
},
{
"id": 2,
"name": "ALCOHOL"
"children": [
{
"id": 8,
"name": "WINE"
},
{
"id": 9,
"name": "VODKA"
}
],
},
}
I'm using django REST framework ModelViewset and serializers. How to do so?
497
Creating and Using Serializers To create a basic serializer one needs to import serializers class from rest_framework and define fields for a serializer just like creating a form or model in Django.
Serializers allow complex data such as querysets and model instances to be converted to native Python datatypes that can then be easily rendered into JSON , XML or other content types.
MPTT, or modified preorder tree traversal, is an efficient way to store hierarchical data in a flat structure. It is an alternative to the adjacency list model, which is inefficient.
It is not necessary to use a serializer. You can do what you would like to achieve in a view. However, serializers help you a lot. If you don't want to use serializer, you can inherit APIView at a function-based-view.
This response is a year too late, but for the benefit of others, use RecursiveField from the djangorestframework-recursive package, which can be installed via:
pip3 install djangorestframework-recursive
I was able to do it like so:
from rest_framework_recursive.fields import RecursiveField
class MyModelRecursiveSerializer(serializers.Serializer):
# your other fields
children = serializers.ListField(
read_only=True, source='your_get_children_method', child=RecursiveField()
)
Just be aware that this is potentially expensive, so you might want to only use this for models whose entries do not change that often and cache the results.
89
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