Merge pull request #1508 from consul/counter_cache_balloting

Ballot_lines counter to investments

app/models/budget/ballot/line.rb

@@ -2,7 +2,7 @@ class Budget
   class Ballot
     class Line < ActiveRecord::Base
       belongs_to :ballot
-      belongs_to :investment
+      belongs_to :investment, counter_cache: :ballot_lines_count
       belongs_to :heading
       belongs_to :group
       belongs_to :budget

db/migrate/20170428111355_add_ballot_line_count_to_investments.rb

@@ -0,0 +1,5 @@
+class AddBallotLineCountToInvestments < ActiveRecord::Migration
+  def change
+    add_column :budget_investments, :ballot_lines_count, :integer, default: 0
+  end
+end

db/schema.rb

@@ -11,7 +11,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 20170427145845) do
+ActiveRecord::Schema.define(version: 20170428111355) do
 
   # These are extensions that must be enabled in order to support this database
   enable_extension "plpgsql"
@@ -144,6 +144,7 @@ ActiveRecord::Schema.define(version: 20170427145845) do
     t.string   "location"
     t.string   "organization_name"
     t.datetime "unfeasible_email_sent_at"
+    t.integer  "ballot_lines_count",                    default: 0
   end
 
   add_index "budget_investments", ["administrator_id"], name: "index_budget_investments_on_administrator_id", using: :btree