Post#approve!: move approving logic to post_approval.rb.

app/models/post.rb

@@ -321,20 +321,8 @@ class Post < ActiveRecord::Base
       end
     end
 
-    def approve!
-      flags.each {|x| x.resolve!}
-      self.is_flagged = false
-      self.is_pending = false
-      self.is_deleted = false
-      self.approver_id = CurrentUser.id
-
-      PostApproval.create(user_id: CurrentUser.id, post_id: id)
-
-      if is_deleted_was == true
-        ModAction.log("undeleted post ##{id}")
-      end
-
-      save!
+    def approve!(approver = CurrentUser.user)
+      approvals.create!(user: approver)
     end
 
     def approved_by?(user)

app/models/post_approval.rb

@@ -3,6 +3,7 @@ class PostApproval < ActiveRecord::Base
   belongs_to :post, inverse_of: :approvals
 
   validate :validate_approval
+  after_create :approve_post
 
   def self.prune!
     where("created_at < ?", 1.month.ago).delete_all
@@ -21,4 +22,11 @@ class PostApproval < ActiveRecord::Base
       errors.add(:base, "You have previously approved this post and cannot approve it again")
     end
   end
+
+  def approve_post
+    ModAction.log("undeleted post ##{id}") if post.is_deleted
+
+    post.flags.each(&:resolve!)
+    post.update({ approver: user, is_flagged: false, is_pending: false, is_deleted: false }, without_protection: true)
+  end
 end