Snippets para cmb2

cmb2_metaboxes.php

<?php
/**
 * Limitar maximo de items de un group field con la opcion rows_limit
 * @param array  $cmb_id      The current box ID.
 * @param int    $object_id   The ID of the current object.
 * @param string $object_type The type of object you are working with.
 * @param array  $cmb         This CMB2 object.
 */
add_action('cmb2_after_form', 'js_limit_group_repeat', 10, 4);
function js_limit_group_repeat($cmb_id, $object_id, $object_type, $cmb) {
	// Encontrar un group field con rows_limit
	$groupFields = array();
	foreach ($cmb->meta_box['fields'] as $field) {
		if ($field['type'] == 'group' && !empty($field['options']['rows_limit'])) {
			$groupFields[] = array('id' => $field['id'], 'limite' => absint($field['options']['rows_limit']));
		}
	}
	if (empty($groupFields)) {
		return;
	}
	?>
	<script type="text/javascript">
	jQuery(document).ready(function($) {
		var groupFields = <?php echo json_encode($groupFields) ?>;
		$.each(groupFields, function(index, item) {
			item.objeto = $('#' + item.id + '_repeat');
			item.countRows = function() {
				return this.objeto.find('> .cmb-row.cmb-repeatable-grouping').length;
			};
			item.disableAdder = function() {
				this.objeto.find('.cmb-add-group-row').prop('disabled', true);
			};
			item.enableAdder = function() {
				this.objeto.find('.cmb-add-group-row').prop('disabled', false);
			};
			item.cuenta = $('<span class="cmb2-metabox-description" style="padding: 0; line-height: 2.2; margin-left: 10px;"></span>');
			item.objeto.find('.cmb-add-group-row').after(item.cuenta);
			item.actualizarCuenta = function() {
				this.cuenta.html(this.countRows() + ' - ' + this.limite + '.');
			};
			item.actualizarCuenta();
			if (item.countRows() >= item.limite) {
				item.disableAdder();
			}
			item.objeto.on('cmb2_add_row', function() {
				item.actualizarCuenta();
				if (item.countRows() >= item.limite) {
					item.disableAdder();
				}
			})
			.on('cmb2_remove_row', function() {
				item.actualizarCuenta();
				if (item.countRows() < item.limite) {
					item.enableAdder();
				}
			});
		});
	});
	</script>
	<?php
}