edit.js.erb

$('#modal1').append('<%= j render "form" %>').openModal();

form.html.erb

<!-- Modal Structure -->
  <div class="modal-content grey-text">

    <h4 class="center black-text"><b>Editar perfil</b></h4>

    <%= form_for(resource, as: resource_name, url: registration_path(resource_name), html: { method: :put, multipart: true }, remote: true, authenticity_token: true ) do |f| %>
    <%= devise_error_messages! %>

      <div class="input-field col s12 m12 l12">
        <%= f.text_field :name, autofocus: true, placeholder: 'Nombre de la empresa' %>
      </div>

      <div class="input-field col s12 m12 l12">
        <%= f.email_field :email, placeholder: 'Correo electronico' %>
      </div>

      <div class="input-field col s12 m12 l12">
        <%= f.text_field :phone, placeholder: 'Numero telefonico' %>
      </div>

      <div class="input-field col s12 l12">
        <%= f.collection_select :municipality_id, Municipality.all, :id, :name, { :include_blank => "Seleccione" } , { class: 'browser-default' } %> <br>
      </div>

      <div class="input-field col s12 m12 l12">
        <%= f.password_field :password, autocomplete: "off", placeholder: 'Cambiar contraseña' %>
      </div>

      <div class="input-field col s12 m12 l12">
        <%= f.password_field :password_confirmation, placeholder: 'Confirmar contraseña' %>
      </div>

      <div class="input-field col s12 m12 l12">
        <div class="file-field">
          <div class="btn teal accent-5">
            <span>IMG</span>
            <%= f.file_field :picture %>
          </div>
          <div class="file-path-wrapper">
            <input class="file-path validate" type="text" placeholder="Agregar imagen">
          </div>
        </div>
      </div>

      <div class="input-field col s12 m12 l12">
        <%= f.text_area :about, class: 'materialize-textarea', placeholder: 'Acerca de la empresa' %>
      </div>

      <div class="input-field col s12 m12 l12">
        <%= f.password_field :current_password, autocomplete: "off", required: true, placeholder: 'Contraseña actual [ Campo requerido ]' %>
      </div>

      <div class="row">
        <div class="input-field col s12 m12 l12 center">
          <%= f.submit "Actualizar perfil", class: 'btn teal accent-5' %>
        </div>
      </div>

    <% end %>

    <hr><br>

    <%= link_to 'Eliminar cuenta', registration_path(resource_name), data: { confirm: "¿Estas seguro que deseas eliminar esta empresa?" }, method: :delete, class: 'btn red lighten-2 white-text left' %>

  </div>
  <div class="modal-footer">
    <a href="#!" class="modal-action modal-close waves-effect waves-green btn blue lighten-2 white-text">Cancelar</a>
  </div>

link

<%= link_to edit_enterprise_registration_path, remote: true do %>
  <%= current_enterprise.name %><i class="material-icons left">person</i>
<% end %>

update.js.erb

<% if @enterprise.resource_name.devise_error_messages! %>
  Materialize.toast('Ocurrio un error!', 4000)
<% else %>
  Materialize.toast('Se creo correctamente!', 4000);
  $('#modal1').closeModal();
<% end %>