performance tweaks for rails 4.1

app/models/post_version.rb

@@ -66,7 +66,7 @@ class PostVersion < ActiveRecord::Base
   end
 
   def sequence_for_post
-    versions = PostVersion.where(:post_id => post_id).order("updated_at desc, id desc").all
+    versions = PostVersion.where(:post_id => post_id).order("updated_at desc, id desc")
     diffs = []
     versions.each_index do |i|
       if i < versions.size - 1

app/models/tag.rb

@@ -607,7 +607,7 @@ class Tag < ActiveRecord::Base
         search_for = "%" + query.to_escaped_for_sql_like + "%"
       end
 
-      Tag.where(["name LIKE ? ESCAPE E'\\\\' AND post_count > 0 AND name <> ?", search_for, query]).all(:order => "post_count DESC", :limit => 6, :select => "name").map(&:name).sort
+      Tag.where(["name LIKE ? ESCAPE E'\\\\' AND post_count > 0 AND name <> ?", search_for, query]).order("post_count DESC").limit(6).select("name").map(&:name).sort
     end
   end
 

app/models/tag_implication.rb

@@ -29,7 +29,7 @@ class TagImplication < ActiveRecord::Base
 
           until children.empty?
             all.concat(children)
-            children = TagImplication.where("antecedent_name IN (?) and status in (?)", children, ["active", "processing"]).all.map(&:consequent_name)
+            children = TagImplication.where("antecedent_name IN (?) and status in (?)", children, ["active", "processing"]).map(&:consequent_name)
           end
         end.sort.uniq
       end

app/models/user_name_change_request.rb

@@ -32,7 +32,7 @@ class UserNameChangeRequest < ActiveRecord::Base
   end
   
   def feedback
-    UserFeedback.for_user(user_id).order("id desc").all
+    UserFeedback.for_user(user_id).order("id desc")
   end
   
   def notify_admins