How to pre-select a choice/option in Gravity Forms using a dynamic field

gistfile1.txt

/**
 * Pre Select a dropdown choice/option in Gravity Forms
 *
 * Create a dynamic list of dropdown choices from a custom post type
 * Based on the current page, pre-select a choice in the drop down
 *
 * @var howto_dynamic_field = the dynamic field set in Gravity Forms on the field group under the Advanced tab
 * @var howto_post_type = Your custom post type you are listing in the drop down
 *
 */
add_filter( 'gform_pre_render_1', 'howto_preselect_dropdown' );
add_filter( 'gform_pre_validation_1', 'howto_preselect_dropdown' );
add_filter( 'gform_pre_submission_filter_1', 'howto_preselect_dropdown' );
add_filter( 'gform_admin_pre_render_1', 'howto_preselect_dropdown' );

function howto_preselect_dropdown( $form ) {

	global $post;

	$current_post = $post->post_name;

	foreach ( $form['fields'] as &$field ) {

		if ( $field->type != 'select' || strpos( $field->inputName, 'howto_dynamic_field' ) === false ) {
			continue;
		}

		$args = array(
			'post_type' => 'howto_post_type',
			'order' => 'ASC',
			'orderby' => 'title',
			'posts_per_page' => -1
		);
		$posts = get_posts( $args );

		$choices = array();

		foreach ( $posts as $post ) {
			if ($current_post === $post->post_name) {
				$choices[] = array( 'text' => __($post->post_title, 'ozh_reap'), 'value' => sanitize_title($post->post_title), 'isSelected' => true );
			} else {
				$choices[] = array( 'text' => __($post->post_title, 'ozh_reap'), 'value' => sanitize_title($post->post_title));
			}
		}

		$field->placeholder = 'Select';
		$field->choices = $choices;

	}

	return $form;
}

Thank you for sharing this.