How to remove default input class type from Simple Form, using Rails 4 and Bootstrap 4? -


i'm using rails 4.2.4 bootstrap 4 (using bootstrap_ruby gem).

simple form adds input type classes form... if input string add class string input. wanted know how stop happening?

for example, if had form file input.

simple_form_for @attachment |f|   f.input_field :file, as: :file end

it produce following html:

<form>   ...    <div class="form-group file optional photo_image">     <label class="file optional control-label" for="attachment_file">file</label>     <input class="file optional" type="file" name="attachment[file]" id="attachment_file"></div>    ...  </form>

it adds file class label , input fields. there way remove file class when form being built?

i'm trying use bootstrap 4 (alpha) , it's clashing file class name.

i thought on config.wrappers adds type of input class eg. string, file.

thanks in advance.

bootstrap 4's naming choice on custom file field unfortunate, generic. unfortunately, there no easy way toggle automatically added css-classes simpleform.

my solution introduce new input field inherits fileinput, receives different name , different css-class:

// initializer # create new file_hack input type same file  class simpleform::inputs::filehackinput < simpleform::inputs::fileinput end  # optional: map file_hack input type configuration easier classes etc. simpleform.setup |config|   ...   config.wrapper_mappings = {      # check_boxes: :vertical_radio_and_checkboxes,      # radio_buttons: :horizontal_radio_and_checkboxes,      # file: :vertical_file_input,      file_hack: :vertical_file_input,      # boolean: :vertical_boolean   }    config.wrappers :vertical_file_input, tag: 'fieldset', class: 'form-group', error_class: 'has-error' |b|     b.use :html5     b.use :placeholder     b.use :label, class: 'control-label'      b.wrapper tag: 'div' |ba|       ba.use :input, class: 'form-control-file'       ba.use :error, wrap_with: { tag: 'span', class: 'help-block' }       ba.use :hint,  wrap_with: { tag: 'div', class: 'text-muted' }     end   end

call file field new input "type".

// form = f.input :file, as: :file_hack

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