archived proposals can not accept votes

app/models/proposal.rb

@@ -121,7 +121,7 @@ class Proposal < ActiveRecord::Base
   end
 
   def register_vote(user, vote_value)
-    if votable_by?(user)
+    if votable_by?(user) && !archived?
       vote_by(voter: user, vote: vote_value)
     end
   end

spec/factories.rb

@@ -163,6 +163,10 @@ FactoryGirl.define do
       end
     end
 
+    trait :archived do
+      created_at (Setting["months_to_archive_proposals"].to_i + 1).months.ago
+    end
+
     trait :with_hot_score do
       before(:save) { |d| d.calculate_hot_score }
     end

spec/models/proposal_spec.rb

@@ -204,6 +204,13 @@ describe Proposal do
         expect {proposal.register_vote(user, 'yes')}.to change{proposal.reload.votes_for.size}.by(0)
       end
     end
+
+    it "should not register vote for archived proposals" do
+      user = create(:user, verified_at: Time.now)
+      archived_proposal = create(:proposal, :archived)
+
+      expect {archived_proposal.register_vote(user, 'yes')}.to change{proposal.reload.votes_for.size}.by(0)
+    end
   end
 
   describe '#cached_votes_up' do
@@ -814,7 +821,7 @@ describe Proposal do
   describe "archived" do
     before(:all) do
       @new_proposal = create(:proposal)
-      @archived_proposal = create(:proposal, created_at: (Setting["months_to_archive_proposals"].to_i + 1).months.ago)
+      @archived_proposal = create(:proposal, :archived)
     end
 
     it "archived? is true only for proposals created more than n (configured months) ago" do