使用 :input_html 可以工作。它有点笨重。
= f.input :email, :input_html => { :class => 'foo' }
您还可以设置所有表单元素上的所有输入:
simple_form_for(@user, :defaults => { :input_html => { :class => "foo" } })
但正如您所料,这适用于一切。
您可以创建自定义表单元素:
# app/inputs/foo_input.rb
class FooInput < SimpleForm::Inputs::StringInput
def input_html_classes
super.push('foo')
end
end
// in your view:
= f.input :email, :as => :foo
See: https://github.com/plataformatec/simple_form/wiki/Adding-custom-input-components https://github.com/plataformatec/simple_form/wiki/Adding-custom-input-components
您还可以创建自定义表单生成器:
def custom_form_for(object, *args, &block)
options = args.extract_options!
simple_form_for(object, *(args << options.merge(builder: CustomFormBuilder)), &block)
end
class CustomFormBuilder < SimpleForm::FormBuilder
def input(attribute_name, options = {}, &block)
options[:input_html].merge! class: 'foo'
super
end
end