diff --git a/lib/ext/communities_block.rb b/lib/ext/communities_block.rb
index 5f986ea..d077e6d 100644
--- a/lib/ext/communities_block.rb
+++ b/lib/ext/communities_block.rb
@@ -4,10 +4,6 @@ class CommunitiesBlock
 
   def profile_list
     result = get_visible_profiles
-    valid_communities_string = Community.get_valid_communities_string
-
-    result.each{|community| result.delete(community) unless eval(valid_communities_string)}
-
     result.slice(0..get_limit-1)
   end
 
@@ -21,6 +17,13 @@ class CommunitiesBlock
     visible_profiles = profiles.visible.includes(
       [:image,:domains,:preferred_domain,:environment]
     )
+
+    delete_communities = []
+    valid_communities_string = Community.get_valid_communities_string
+    Community.all.each{|community| delete_communities << community.id unless eval(valid_communities_string)}
+
+    visible_profiles = visible_profiles.where(["profiles.id NOT IN (?)", delete_communities])
+
     if !prioritize_profiles_with_image
       return visible_profiles.all(
         :limit => get_limit,
@@ -32,10 +35,11 @@ class CommunitiesBlock
         :order => 'profiles.updated_at DESC'
       ).sort_by {rand}
     else
-      return visible_profiles.with_image.sort_by {rand} +
+      visible_profiles = visible_profiles.with_image.sort_by {rand} +
         visible_profiles.without_image.all(
           :limit => get_limit * 5, :order => 'profiles.updated_at DESC'
         ).sort_by {rand}
+      return visible_profiles
     end
   end
 end
diff --git a/lib/ext/community.rb b/lib/ext/community.rb
index b8cdc7b..c737374 100644
--- a/lib/ext/community.rb
+++ b/lib/ext/community.rb
@@ -28,11 +28,14 @@ class Community
 
   def self.get_valid_communities_string
     remove_of_communities_methods = Community.instance_methods.select{|m| m =~ /remove_of_community_search/}
-    valid_communities_string = ""
+    valid_communities_string = "!("
     remove_of_communities_methods.each do |method|
-      valid_communities_string += "!community.send('#{method}') && "
+      valid_communities_string += "community.send('#{method}') || "
     end
-    valid_communities_string[0..-5]
+    valid_communities_string = valid_communities_string[0..-5]
+    valid_communities_string += ")"
+
+    valid_communities_string
   end
 
   def software?
diff --git a/lib/ext/search_controller.rb b/lib/ext/search_controller.rb
index c8bcc39..2a2856c 100644
--- a/lib/ext/search_controller.rb
+++ b/lib/ext/search_controller.rb
@@ -3,10 +3,12 @@ require_dependency 'search_controller'
 class SearchController
 
   def communities
+    delete_communities = []
     valid_communities_string = Community.get_valid_communities_string
+    Community.all.each{|community| delete_communities << community.id unless eval(valid_communities_string)}
 
     @scope = visible_profiles(Community)
-    @scope.each{|community| @scope.delete(community) unless eval(valid_communities_string)}
+    @scope = @scope.where(["id NOT IN (?)", delete_communities]) unless delete_communities.empty?
 
     full_text_search
   end
diff --git a/test/unit/communities_block_test.rb b/test/unit/communities_block_test.rb
index 653140b..e10251b 100644
--- a/test/unit/communities_block_test.rb
+++ b/test/unit/communities_block_test.rb
@@ -24,7 +24,8 @@ class CommunitiesBlockTest < ActiveSupport::TestCase
     @software_info = nil
   end
   should "not have community of software or institution in block" do
-    assert_equal 1, @comminities_block.profile_list.count
+    assert_includes @comminities_block.profile_list, @community
+    assert_not_includes @comminities_block.profile_list, @software_info.community
   end
 
 end
--
libgit2 0.21.2