how a field and its value can be found in a queryset object

[wuuuuu]

Hi, 

first, I have such an example: 

1. users = Some.objects.filter(user="someone")
   
2. users.update(price=100)
   

based on different user (I have a table to save it), users go to the different databases, and due to Master/Slave seperated,  update and filter should be in different places as well). So in line 2, I need to find whether the queryset has a special where field user, and get the db connection based on the user. 

My code looks like: 

from django.db.models.query import QuerySet

class UserQuerySet(QuerySet):

        def update(self):

              # please let me know how I can get user from self

             user = some_way_to_get_user(self)

             db = get_db_for_write(user)

             self.db = db

             super(UserQuerySet, self).update()

My problem lies in the blue part of above code, please let me know how I can achieve this. 

I've looked at the code, which might have something like: 

     def update(self):

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[Karen Tracey-2]

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Karen

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