Improved error handling. If string in invalid charset (e. g. on binary fields), .blank? will fail (call it later).

app/models/application_model/checks_attribute_values_and_length.rb

@@ -18,7 +18,6 @@ module ApplicationModel::ChecksAttributeValuesAndLength
   def check_attribute_values_and_length
     columns = self.class.columns_hash
     attributes.each do |name, value|
-      next if value.blank?
       next if !value.instance_of?(String)
       column = columns[name]
       next if !column
@@ -27,6 +26,8 @@ module ApplicationModel::ChecksAttributeValuesAndLength
         self[name].force_encoding('BINARY')
       end
 
+      next if value.blank?
+
       # strip null byte chars (postgresql will complain about it)
       if column.type == :text
         if Rails.application.config.db_null_byte == false