diff --git a/app/helpers/application_helper.rb b/app/helpers/application_helper.rb
index acb7ba9..8377d99 100644
--- a/app/helpers/application_helper.rb
+++ b/app/helpers/application_helper.rb
@@ -158,7 +158,10 @@ module ApplicationHelper
   end
 
   # Helper that formats object for html or text rendering
-  def format_object(object, html=true)
+  def format_object(object, html=true, &block)
+    if block_given?
+      object = yield object
+    end
     case object.class.name
     when 'Array'
       object.map {|o| format_object(o, html)}.join(', ').html_safe
@@ -188,7 +191,7 @@ module ApplicationHelper
         if f.nil? || f.is_a?(String)
           f
         else
-          format_object(f, html)
+          format_object(f, html, &block)
         end
       else
         object.value.to_s
diff --git a/app/helpers/queries_helper.rb b/app/helpers/queries_helper.rb
index 9324a9d..ca8d253 100644
--- a/app/helpers/queries_helper.rb
+++ b/app/helpers/queries_helper.rb
@@ -18,6 +18,8 @@
 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 
 module QueriesHelper
+  include ApplicationHelper
+
   def filters_options_for_select(query)
     options_for_select(filters_options(query))
   end
@@ -81,7 +83,7 @@ module QueriesHelper
   end
 
   def column_content(column, issue)
-    value = column.value(issue)
+    value = column.value_object(issue)
     if value.is_a?(Array)
       value.collect {|v| column_value(column, issue, v)}.compact.join(', ').html_safe
     else
@@ -110,7 +112,7 @@ module QueriesHelper
   end
 
   def csv_content(column, issue)
-    value = column.value(issue)
+    value = column.value_object(issue)
     if value.is_a?(Array)
       value.collect {|v| csv_value(column, issue, v)}.compact.join(', ')
     else
@@ -119,22 +121,16 @@ module QueriesHelper
   end
 
   def csv_value(column, issue, value)
-    case value.class.name
-    when 'Time'
-      format_time(value)
-    when 'Date'
-      format_date(value)
-    when 'Float'
-      sprintf("%.2f", value).gsub('.', l(:general_csv_decimal_separator))
-    when 'IssueRelation'
-      other = value.other_issue(issue)
-      l(value.label_for(issue)) + " ##{other.id}"
-    when 'TrueClass'
-      l(:general_text_Yes)
-    when 'FalseClass'
-      l(:general_text_No)
-    else
-      value.to_s
+    format_object(value, false) do |value|
+      case value.class.name
+      when 'Float'
+        sprintf("%.2f", value).gsub('.', l(:general_csv_decimal_separator))
+      when 'IssueRelation'
+        other = value.other_issue(issue)
+        l(value.label_for(issue)) + " ##{other.id}"
+      else
+        value
+      end
     end
   end
 
diff --git a/app/models/query.rb b/app/models/query.rb
index 4493616..206d0ab 100644
--- a/app/models/query.rb
+++ b/app/models/query.rb
@@ -57,6 +57,10 @@ class QueryColumn
     object.send name
   end
 
+  def value_object(object)
+    object.send name
+  end
+
   def css_classes
     name
   end
@@ -80,10 +84,21 @@ class QueryCustomFieldColumn < QueryColumn
     @cf
   end
 
-  def value(object)
+  def value_object(object)
     if custom_field.visible_by?(object.project, User.current)
-      cv = object.custom_values.select {|v| v.custom_field_id == @cf.id}.collect {|v| @cf.cast_value(v.value)}
-      cv.size > 1 ? cv.sort {|a,b| a.to_s <=> b.to_s} : cv.first
+      cv = object.custom_values.select {|v| v.custom_field_id == @cf.id}
+      cv.size > 1 ? cv.sort {|a,b| a.value.to_s <=> b.value.to_s} : cv.first
+    else
+      nil
+    end
+  end
+
+  def value(object)
+    raw = value_object(object)
+    if raw.is_a?(Array)
+      raw.map {|r| @cf.cast_value(r.value)}
+    elsif raw
+      @cf.cast_value(raw.value)
     else
       nil
     end
@@ -105,7 +120,7 @@ class QueryAssociationCustomFieldColumn < QueryCustomFieldColumn
     @association = association
   end
 
-  def value(object)
+  def value_object(object)
     if assoc = object.send(@association)
       super(assoc)
     end