app/views/alchemy/admin/pictures/assign.js.erb
(function () {
var $form_field = $("#<%= @form_field_id -%>")
$("#assignable_<%= @assignable_id %> a").attr("href", "#").off("click")
$form_field.val("<%= @assignable_id %>")
$form_field.attr("data-image-file-width", <%= @picture.image_file_width %>)
$form_field.attr("data-image-file-height", <%= @picture.image_file_height %>)
Alchemy.closeCurrentDialog(function() {
$form_field[0].closest("alchemy-element-editor").setDirty()
})
})()