Fix bug PG::AmbiguousColumn on PreferenceListDossier

app/models/preference_list_dossier.rb

@@ -8,7 +8,7 @@ class PreferenceListDossier < ActiveRecord::Base
   end
 
   def table_with_s_attr
-    return self.attr if table.nil? || table.empty?
+    return 'dossiers.'+self.attr if table.nil? || table.empty?
     table + 's' + '.' + attr
   end
 

app/services/dossiers_list_gestionnaire_service.rb

@@ -105,7 +105,9 @@ class DossiersListGestionnaireService
         filter = "%"+filter+"%" unless filter.include? '%'
 
         acc += (acc.to_s.empty? ? ''.to_s : " AND ") +
+            "CAST(" +
             preference.table_with_s_attr +
+            " as TEXT)" +
             " LIKE " +
             "'" +
             filter +