! (again)

app/models/inbox.rb

@@ -3,16 +3,15 @@ class Inbox < ActiveRecord::Base
   belongs_to :question
 
   def answer(answer, user)
-    Answer.create(content: answer,
-                  user: user,
-                  question: self.question)
+    Answer.create!(content: answer,
+                   user: user,
+                   question: self.question)
     user.increment! :answered_count
     self.question.increment! :answer_count
     self.destroy
   end
 
   def remove
-    self.question.decrement! :answer_count
     unless self.question.user.nil?
       self.question.user.decrement! :asked_count if self.question.answer_count == 1
     end