app/views/rails_admin/main/_form_wysihtml5.html.erb
<%
js_data = {
csspath: field.css_location,
jspath: field.js_location,
config_options: field.config_options.to_json
}
%>
<%= form.text_area field.method_name, field.html_attributes.reverse_merge(data: { richtext: 'bootstrap-wysihtml5', options: js_data.to_json }).reverse_merge({ value: field.form_value }) %>