Added timestamps to tweets and they organize by newest on top

lib/mixer/posts/tweet.ex

@@ -129,6 +129,12 @@ defmodule Mixer.Posts.Tweet do
       allow_nil? false
       public? true
     end
+
+    create_timestamp :inserted_at do
+      public? true
+    end
+
+    update_timestamp :updated_at
   end
 
   relationships do
@@ -146,6 +152,12 @@ defmodule Mixer.Posts.Tweet do
     has_many :tweet_likes, Mixer.Posts.TweetLike
   end
 
+  calculations do
+    calculate :user_email, :string, expr(user.email) do
+      public? true
+    end
+  end
+
   aggregates do
     exists :liked_by_me, :tweet_likes do
       public? true