Django REST Framework Batch PUT (Update) - json

Question

I have implemented viewsets and routers, making an API that returns me some specific fields, I get the info correctly, and I can update (PUT) JUST ONE of the details in the JSON, one by one, and I need to update all of them at the same time.
I have this in my serializers.py
class OCompraDetalleSerializer(serializers.HyperlinkedModelSerializer):
# producto = ProductoSerializer(many=False)
item = serializers.RelatedField(source='producto.modelo')
descripcion = serializers.RelatedField(source='producto.descripcion')
unidad = serializers.RelatedField(source='producto.unidad')
# ocompra = OCompraSerializer(many = False)
class Meta:
model = OCompraDetalle
fields = ('url','item','descripcion','unidad','cantidad_ordenada','cantidad_recibida','fecha_entrega','precio','epc')
The API returns me this
HTTP 200 OK
Content-Type: application/json
Vary: Accept
Allow: GET, POST, HEAD, OPTIONS
[
{
"url": "http://localhost:8000/api/ocompradetalle/1/",
"item": "AANS/428375",
"descripcion": "SPLICING KIT SHIPPING ASSEMBLY",
"unidad": "PZA",
"cantidad_ordenada": "1",
"cantidad_recibida": "1",
"fecha_entrega": "2015-07-14",
"precio": "500",
"epc": "0320CAF425"
},
{
"url": "http://localhost:8000/api/ocompradetalle/5/",
"item": "AANS/53042",
"descripcion": "NOZZLE F-1/2 W/BLOW OFF CAP,LOCKWASHERS",
"unidad": "PZA",
"cantidad_ordenada": "5",
"cantidad_recibida": "0",
"fecha_entrega": "2015-07-14",
"precio": "300",
"epc": "0436F0BECD"
},
...
So the ALLOW section indicates that I CANT put, but if I open a single one detail, I get this:
HTTP 200 OK
Content-Type: application/json
Vary: Accept
Allow: GET, PUT, PATCH, DELETE, HEAD, OPTIONS
{
"url": "http://localhost:8000/api/ocompradetalle/1/",
"item": "AANS/428375",
"descripcion": "SPLICING KIT SHIPPING ASSEMBLY",
"unidad": "PZA",
"cantidad_ordenada": "1",
"cantidad_recibida": "1",
"fecha_entrega": "2015-07-14",
"precio": "500",
"epc": "0320CAF425"
}
Making it possible to UPDATE, my question is:
How can I PUT (Update) the whole JSON at the same time instead of making an Update for every single entry?
NOTE: the'item','descripcion','unidad' fields comes from another Model, thats why I have the ProductoSerializer commented, so I decided to include the specific values in the json.
NOTE 2: I only need to PUT or Update the cantidad_recibida value for every entry.

Answer 1

Django REST Framework does not allow for batch modifications to objects, but a package has been created that brings batch updating. Django REST Framework Bulk is a package that allows you to add a mixin to any generic view (including ViewSets) that can give it the ability to bulk create, update, or delete objects.
It can be made to work with routers with slight modifications. This should allow you to do what you are looking for.
NOTE 2: I only need to PUT or Update the cantidad_recibida value for every entry.
This sounds like you are looking for PATCH, though that doesn't allow for object creation in the same way that PUT allows.