django / tastypie - how to exclude a resource attribute from obj_create, but keep it for listing

  I have the following tastypie resource:

 class WorkloadResource(ModelResource):      # blueprints = ManyToManyField(Blueprint, 'blueprints')      blueprint = fields.OneToManyField('catalog.api.BlueprintResource', attribute='blueprint',                                           related_name='workloads', full=True, null=True)        def obj_create(self, bundle, request=None, **kwargs):          # return super(WorkloadResource, self).obj_create(bundle, request, **kwargs)          return super(WorkloadResource, self).obj_create(bundle, request=request, **kwargs)        def obj_update(self, bundle, request=None, **kwargs):            workload = Workload.objects.get(id=kwargs.get("pk"))          workload.description = bundle.data.get("description")          workload.name = bundle.data.get("name")          workload.image = bundle.data.get("image")          workload.flavor = bundle.data.get("flavor")          workload.save()            def obj_delete(self, bundle, **kwargs):                return super(WorkloadResource, self).obj_delete(bundle)            def determine_format(self, request):              return 'application/json'        class Meta:          queryset = Workload.objects.all()          resource_name = 'workload'          authorization=Authorization()          filtering = {              "blueprint": ('exact', ),          }


 When I use curl to POST: 

 curl -i -H "Content-Type: application/json" -X POST -d 
 @wkl.json  http://localhost:8000/api/workload/

 where wkl.json is:

 { "name":"w 5", "description":"w 5 desc" }


 I get this error:

 AttributeError: 'Workload' object has no attribute 'blueprint'

 I do need to have this attribute, so I can list all child workloads for a given blueprint 
 like this:  GET /api/workload/?blueprint=1

 but I need to exclude this 'blueprint' attribute from participating in the obj_create

 What is the proper place and syntax to do this?

-Eugene

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