Update raw query is not working in django

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Here i passing value by post request from form and and want to update only notes field from TestcaseCache table pk is id of TestcaseCache table

def saveReviewTestcase(request,self,test_id):

    if request.method == 'POST':
        print test_id
        input_notes=request.POST.get('textarea')
        cursor = connection.cursor()
        cursor.execute("UPDATE TestcaseCache SET  id= test_id  WHERE notes = %s", [self.input_notes])
        row = cursor.fetchone()
        print row

asked 42 secs ago

user3563105

1