speed up tests

add the ability to find the first notify private message

app/models/post.rb

@@ -270,7 +270,26 @@ class Post < ActiveRecord::Base
   end
 
   def url
-    "/t/#{Slug.for(topic.title)}/#{topic.id}/#{post_number}"
+    Post.url(topic.title, topic.id, post_number)
+  end
+
+  def self.url(title, topic_id, post_number)
+    "/t/#{Slug.for(title)}/#{topic_id}/#{post_number}"
+  end
+
+  def self.urls(post_ids)
+    ids = post_ids.map{|u| u}
+    if ids.length > 0
+      urls = {}
+      Topic.joins(:posts).where('posts.id' => ids).
+        select(['posts.id as post_id','post_number', 'topics.title', 'topics.id']).
+      each do |t|
+        urls[t.post_id.to_i] = url(t.title, t.id, t.post_number)
+      end
+      urls
+    else 
+      {}
+    end
   end
 
   def author_readable

app/models/post_action.rb

@@ -6,7 +6,7 @@ class PostAction < ActiveRecord::Base
 
   include RateLimiter::OnCreateRecord
 
-  attr_accessible :post_action_type_id, :post_id, :user_id, :post, :user, :post_action_type, :message
+  attr_accessible :post_action_type_id, :post_id, :user_id, :post, :user, :post_action_type, :message, :related_post_id
 
   belongs_to :post
   belongs_to :user
@@ -89,16 +89,21 @@ class PostAction < ActiveRecord::Base
         end
       end
 
+      related_post_id = nil
       if target_usernames.present?
-        PostCreator.new(user,
+        related_post_id = PostCreator.new(user,
                               target_usernames: target_usernames,
                               archetype: Archetype.private_message,
                               subtype: subtype,
                               title: title,
                               raw: body
-                       ).create
+                       ).create.id
       end
-      create(post_id: post.id, user_id: user.id, post_action_type_id: post_action_type_id, message: message)
+      create( post_id: post.id,
+              user_id: user.id,
+              post_action_type_id: post_action_type_id,
+              message: message,
+              related_post_id: related_post_id )
     rescue ActiveRecord::RecordNotUnique
       # can happen despite being .create
       # since already bookmarked