fix specs; move presence_of_content validation check into a before_destory to play nicely with federation

app/models/photo.rb

@@ -31,6 +31,10 @@ class Photo < ActiveRecord::Base
     self.status_message.update_photos_counter if status_message
   end
 
+  after_destroy do
+    self.status_message.update_photos_counter if status_message
+  end
+
   def clear_empty_status_message
     if self.status_message_guid && self.status_message.text_and_photos_blank?
       self.status_message.destroy

app/models/status_message.rb

@@ -18,15 +18,14 @@ class StatusMessage < Post
 
   has_many :photos, :dependent => :destroy, :foreign_key => :status_message_guid, :primary_key => :guid
 
-  # TODO: disabling presence_of_content() (and its specs in status_message_controller_spec.rb:125) is a quick and dirty fix for federation
   # a StatusMessage is federated before its photos are so presence_of_content() fails erroneously if no text is present
-  #validate :presence_of_content
+  # therefore, we put the validation in a before_destory callback instead of a validation
+  before_destroy :presence_of_content
 
   attr_accessible :text, :provider_display_name
   attr_accessor :oembed_url
 
   after_create :create_mentions
-
   after_create :queue_gather_oembed_data, :if => :contains_oembed_url_in_text?
 
   #scopes
@@ -192,8 +191,8 @@ class StatusMessage < Post
 
   protected
   def presence_of_content
-    if text_and_photos_blank?
-      errors[:base] << 'Status message requires a message or at least one photo'
+    unless text_and_photos_blank?
+      errors[:base] << "Cannot destory a StatusMessage with text and/or photos present"
     end
   end
 

spec/models/photo_spec.rb

@@ -227,17 +227,19 @@ describe Photo do
       }.should change(Photo, :count).by(-1)
     end
 
-    it 'will delete parent status message iff message is otherwise empty' do
+    it 'will delete parent status message if message is otherwise empty' do
       expect {
         @photo2.destroy
       }.should change(StatusMessage, :count).by(-1)
     end
 
-    it 'will not delete parent status message iff message had other content' do
-      expect {
+    it 'will not delete parent status message if message had other content' do
       @status_message.text = "Some text"
       @status_message.save
       @status_message.reload
+
+      expect {
+        @photo2.status_message.reload
         @photo2.destroy
       }.should_not change(StatusMessage, :count)
     end