2 files changed, 19 insertions, 0 deletions

@@ -8,11 +8,22 @@ class Stream < ApplicationRecord
   validates :title, presence: true
   validates :slug, presence: true, format: /\A[-a-z0-9]+\z/
 
+  before_create :set_post_timestamp
+
   def path
     "/thinks/#{slug}"
   end
 
+  def to_param
+    slug
+  end
+
   def taggable
     self
   end
+
+  private
+    def set_post_timestamp
+      self.latest_post_at = self.created_at
+    end
 end
@@ -5,6 +5,8 @@ class Update < ApplicationRecord
 
   validates :stream, :body, presence: true
 
+  after_create :set_latest_timestamp
+
   def path
     "/thinks/#{stream.slug}\#update-#{id}"
   end
@@ -12,4 +14,10 @@ class Update < ApplicationRecord
   def taggable
     stream
   end
+
+  private
+    def set_latest_timestamp
+      self.stream.latest_post_at = self.created_at
+      self.stream.save!
+    end
 end