Seed categories in transactions

db/fixtures/500_lounge_category.rb

@@ -5,6 +5,7 @@ unless Rails.env.test?
     # The category for users with trust level 3 has been created.
     # Add permissions and a description to it.
 
+    Category.transaction do
       lounge.group_names = ['trust_level_3']
       unless lounge.save
         puts lounge.errors.full_messages
@@ -37,4 +38,5 @@ unless Rails.env.test?
         Category.exec_sql "UPDATE categories SET topic_count = 0 WHERE id = #{lounge.id}"
       end
     end
+  end
 end

db/fixtures/501_meta_category.rb

@@ -2,6 +2,7 @@ unless Rails.env.test?
   meta = Category.where(id: SiteSetting.meta_category_id).first
   if meta && !meta.topic_id
 
+    Category.transaction do
       creator = PostCreator.new(Discourse.system_user,
         raw: I18n.t('meta_category_description'),
         title: I18n.t('category.topic_prefix', category: meta.name),
@@ -26,4 +27,5 @@ unless Rails.env.test?
       # Reset topic count because we don't count the description topic
       Category.exec_sql "UPDATE categories SET topic_count = 0 WHERE id = #{meta.id}"
     end
+  end
 end

db/fixtures/502_staff_category.rb

@@ -4,6 +4,7 @@ unless Rails.env.test?
 
     # Add permissions and a description to the Staff category.
 
+    Category.transaction do
       staff.group_names = ['staff']
       unless staff.save
         puts staff.errors.full_messages
@@ -35,4 +36,5 @@ unless Rails.env.test?
         Category.exec_sql "UPDATE categories SET topic_count = 0 WHERE id = #{staff.id}"
       end
     end
+  end
 end