How to expose all the ACF fields to Wordpress REST API in both pages and custom postypes

问题

I want to expose all the ACF fields that belong to a page or custom post type to the WordPress REST API in order to do some API calls through javascript.

The final expected result would be all the ACF fields inside an ACF object that you can easily access.

回答1:

Through the following code, you will be able to expose page and your custom postypes ACF fields in the wordpress REST API and access them inside the ACF object.

You can obviously customise the postypes to exclude or to include in the arrays: $postypes_to_exclude and $extra_postypes_to_include.

function create_ACF_meta_in_REST() {
    $postypes_to_exclude = ['acf-field-group','acf-field'];
    $extra_postypes_to_include = ["page"];
    $post_types = array_diff(get_post_types(["_builtin" => false], 'names'),$postypes_to_exclude);

    array_push($post_types, $extra_postypes_to_include);

    foreach ($post_types as $post_type) {
        register_rest_field( $post_type, 'ACF', [
            'get_callback'    => 'expose_ACF_fields',
            'schema'          => null,
       ]
     );
    }

}

function expose_ACF_fields( $object ) {
    $ID = $object['id'];
    return get_fields($ID);
}

add_action( 'rest_api_init', 'create_ACF_meta_in_REST' );

Here's the gist for reference: https://gist.github.com/MelMacaluso/6c4cb3db5ac87894f66a456ab8615f10

回答2:

Another simple solution that is working perfect for me now. You can add the following function on functions.php or fields.php Using ACF getFields before sending a rest request. You can add this to any special page rest_prepare_page or rest_prepare_post.

The ACF data will be in the json response with key acf

// add this to functions.php
//register acf fields to Wordpress API
//https://support.advancedcustomfields.com/forums/topic/json-rest-api-and-acf/

function acf_to_rest_api($response, $post, $request) {
    if (!function_exists('get_fields')) return $response;

    if (isset($post)) {
        $acf = get_fields($post->id);
        $response->data['acf'] = $acf;
    }
    return $response;
}
add_filter('rest_prepare_post', 'acf_to_rest_api', 10, 3);