Default value for the taxonomy field type: Solution

• araeubig

• December 29, 2022 at 1:38 pm

Based on actual changes with custom post types there exist based on this post: https://support.advancedcustomfields.com/forums/topic/default-value-for-the-taxonomy-field-type/

a new solution:

	public function pf_exhibition_index_load( $field ) {
		
		$tax = get_taxonomy( 'pf_exhibition_template' );
		$slug = $tax->default_term['slug'];
		if ( $term = get_term_by( 'slug', $slug, 'pf_exhibition_template' ) ) {
			$field['default_value'] = $term->term_id;
		}
		return $field;

	}

Registering a custom taxonomy allowes to define a default term – with this solution and the option to translate your term a default term in ACF is possible.

		$args = array(
			'labels'						=> $labels,
			'default_term' => array(
				'name'							=> _x( 'Default', 'Default template taxonomy name', 'picture-frame' ),
				'slug'							=> _x( 'default', 'Default template taxonomy slug', 'picture-frame' ),
				'description'					=> __( 'This is the default template.', 'picture-frame' ),
			),

Now the select2 field which is ACF-AJAX powered couldnt use our “default_value”. Therefore i tried a new approach by using a second AJAX function:

The JS-Part:

		acf.addAction('show_field/key=field_pf_exhibition_template', function() {
			var pf_template = acf.getField('field_pf_exhibition_template');
			data = pf_acf_fetch_data('pf_get_exhibition_template_standard', id);
			$.when(data).then(function(data){
				pf_template.select2.addOption({
					id: data.id,
          			text: data.name,
          			selected: true
        		});
			});	
		});

and the corresponding PHP part:

add_action( 'wp_ajax_pf_get_exhibition_template_standard', array( $this, 'pf_ajax_get_exhibition_template_standard' ) );

	public function pf_ajax_get_exhibition_template_standard() {
		
		if ( !wp_verify_nonce( $_POST['nonce'], 'acf_nonce' ) ) {
			die();
		}
		
		$tax = get_taxonomy( 'pf_exhibition_template' );
		$slug = $tax->default_term['slug'];
		$term = get_term_by( 'slug', $slug, 'pf_exhibition_template');
		if ( $term = get_term_by( 'slug', $slug, 'pf_exhibition_template' ) ) {
			$data = array( 'id' => $term->term_id, 'name' => $term->name );
		}
		else {
			$data = false;
		}
		
		echo json_encode($data);
		exit;
	}

Now it works like a charm.