Dont show non-utf8-able values

Author: rgalite

app/controllers/forest_liana/application_controller.rb

@@ -120,7 +120,9 @@ def force_utf8_attributes_encoding(model)
         model['attributes'].each do |name, value|
           if value.respond_to?(:force_encoding)
             begin
-              model['attributes'][name] = value.force_encoding('utf-8')
+              encoded_value = value.force_encoding('utf-8')
+              encoded_value = value.encode!('utf-8', invalid: :replace, undef: :replace, replace: '?')
+              model['attributes'][name] = encoded_value.valid_encoding? ? encoded_value : nil
             rescue
               # NOTICE: Enums are frozen Strings
             end