fixes #2427: Prevent removing all tags from post

app/models/post.rb

@@ -481,6 +481,12 @@ class Post < ActiveRecord::Base
 
     def update_tag_post_counts
       decrement_tags = tag_array_was - tag_array
+
+      if decrement_tags.size > 1 && !CurrentUser.is_builder? && CurrentUser.created_at > 1.week.ago
+        self.errors.add(:updater_id, "must have an account at least 1 week old to remove tags")
+        return false
+      end
+
       increment_tags = tag_array - tag_array_was
       if increment_tags.any?
         Tag.delay(:queue => "default").increment_post_counts(increment_tags)

config/locales/en.yml

@@ -8,6 +8,7 @@ en:
       post:
         approver: "You"
         approver_id: "You"
+        updater_id: "You"
       post_flag:
         creator: "You"
         creator_id: "You"

test/unit/post_test.rb

@@ -430,6 +430,18 @@ class PostTest < ActiveSupport::TestCase
         @post = FactoryGirl.create(:post)
       end
 
+      context "as a new user" do
+        setup do
+          CurrentUser.user = FactoryGirl.create(:user)
+          @post.update_attribute(:tag_string, "aaa bbb ccc ddd")
+        end
+
+        should "not allow you to remove more than 2 tags" do
+          @post.update_attributes(:tag_string => "aaa")
+          assert_equal(["You must have an account at least 1 week old to remove tags"], @post.errors.full_messages)
+        end
+      end
+
       context "with a banned artist" do
         setup do
           @artist = FactoryGirl.create(:artist)