I try to config simple\_form to always set all fields NOT required by default. 

But I still need this when I put `:required => true` in the view.

Then I go to `config/initializers/simple_form.rb` and set it like this.

```
  config.wrappers :default, :class => :input, :required => false,
    :hint_class => :field_with_hint, :error_class => :field_with_errors do |b|

```

and set `config.required_by_default = false` 

But asterisk still show up. 

Thanks for any suggestion.