Generate reposts model/table that stores the repost history.

app/models/repost.rb

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+class Repost < ActiveRecord::Base
+end

db/migrate/20131208115327_create_reposts.rb

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+class CreateReposts < ActiveRecord::Migration
+  def change
+    create_table :reposts do |t|
+      t.string :mentioned
+      t.bigint :postid
+      t.bigint :repostid
+
+      t.timestamps
+    end
+    add_index :reposts, :repostid
+  end
+end

test/fixtures/reposts.yml

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+# Read about fixtures at http://api.rubyonrails.org/classes/ActiveRecord/FixtureSet.html
+
+one:
+  mentioned: MyString
+  postid: 
+  repostid: 
+
+two:
+  mentioned: MyString
+  postid: 
+  repostid: 

test/models/repost_test.rb

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+require 'test_helper'
+
+class RepostTest < ActiveSupport::TestCase
+  # test "the truth" do
+  #   assert true
+  # end
+end