add counter cache

lib/code_corps/model/project.ex

@@ -31,6 +31,9 @@ defmodule CodeCorps.Project do
     field :title, :string
     field :total_monthly_donated, :integer, default: 0
     field :website, :string
+    field :open_conversations_count, :integer
+    field :closed_conversations_count, :integer
+
 
     belongs_to :organization, CodeCorps.Organization
 

priv/repo/migrations/20171226203914_add_counter_cache_to_project.exs

@@ -0,0 +1,10 @@
+defmodule CodeCorps.Repo.Migrations.AddCounterCacheToProject do
+  use Ecto.Migration
+
+  def change do
+    alter table(:projects) do
+      add :open_conversations_count, :integer
+      add :closed_conversations_count, :integer
+    end
+  end
+end