fixes #1538

app/logical/post_query_builder.rb

@@ -190,6 +190,12 @@ class PostQueryBuilder
       end
     end
 
+    if q[:pool] == "none"
+      relation = relation.where("posts.pool_string = ''")
+    elsif q[:pool] == "any"
+      relation = relation.where("posts.pool_string != ''")
+    end
+
     if q[:subscriptions]
       relation = add_tag_subscription_relation(q[:subscriptions], relation)
       has_constraints!

app/models/tag.rb

@@ -379,7 +379,13 @@ class Tag < ActiveRecord::Base
             q[:tags][:exclude] << "pool:#{Pool.name_to_id($2)}"
 
           when "pool"
-            q[:tags][:related] << "pool:#{Pool.name_to_id($2)}"
+            if $2.downcase == "none"
+              q[:pool] = "none"
+            elsif $2.downcase == "any"
+              q[:pool] = "any"
+            else
+              q[:tags][:related] << "pool:#{Pool.name_to_id($2)}"
+            end
 
           when "-fav"
             q[:tags][:exclude] << "fav:#{User.name_to_id($2)}"