python - Django Restframework: update an object without accesing specific object id -

i using django restframework, , want update object. have following model:

class promotionalcode(models.model):     promotional_code = models.charfield(max_length=10, default=random_with_letters(), unique=true)     myuser = models.foreignkey('myuser', related_name='promotional_code_user', blank=true, null=true)     promotion_type = models.positiveintegerfield(default=1)     time_transaction = models.datetimefield(default=datetime.now())     used = models.booleanfield(default=false) 

the following viewset:

class updateonlydetailviewset(mixins.updatemodelmixin,  viewsets.genericviewset):     pass 

the following view:

class promotionalcodeviewset(updateonlydetailviewset):     queryset = promotionalcode.objects.all()     serializer_class = promotionalcodeserializer     permission_classes = (isownerorreadonly,) 

and has following url:

router = defaultrouter() router.register(r'promotionalcode', views.promotionalcodeviewset) 

i can update promotionalcode object when access

/promotionalcode/code_id

and want update code when access

/promotionalcode/

without specifying id. have do it?

i have found 3 solutions problem. have tested 2 of them:

• first solution: have created model called promotionalcodeshistory(models.model) same attributes promotionalcode , create serializer method create, creating promotionalcodeshistory instance , call update method update promotionalcode. then, when access url /promotional/ can update promotional code.

• second solution: modify defaultrouter() access update on /promotional/ url, following code:

from rest_framework.routers import defaultrouter class customupdaterouter(defaultrouter): routes = [ # list route. route( url=r'^{prefix}{trailing_slash}$', mapping={ 'get': 'list', 'post': 'create', 'put': 'update', 'patch': 'partial_update', }, name='{basename}-list', initkwargs={'suffix': 'list'} ), # dynamically generated list routes. # generated using @list_route decorator # on methods of viewset. dynamiclistroute( url=r'^{prefix}/{methodname}{trailing_slash}$', name='{basename}-{methodnamehyphen}', initkwargs={} ), # detail route. route( url=r'^{prefix}/{lookup}{trailing_slash}$', mapping={ 'get': 'retrieve', 'delete': 'destroy' }, name='{basename}-detail', initkwargs={'suffix': 'instance'} ), # dynamically generated detail routes. # generated using @detail_route decorator on methods of viewset. dynamicdetailroute( url=r'^{prefix}/{lookup}/{methodname}{trailing_slash}$', name='{basename}-{methodnamehyphen}', initkwargs={} ), ] then, on view class, reimplement get_object method specify own filters object, can access get_serializer_context method context data, filter specified using dictionary of unicode, following:

{u'key': unicode(variable1), u'key2': unicode(variable2)} 

• third solution: last solution have not tested, change primary key promotional_code field, access promotional code, using /promotionalcode/promotional_code