Just a small update on this.
I ended up not using a plugin at all, but instead just adding the ACF fields by batch like this:
add_action( 'rest_api_init', 'slug_register_acf' );
function slug_register_acf() {
$post_types = get_post_types(['public'=>true], 'names');
foreach ($post_types as $type) {
register_api_field( $type,
'acf',
array(
'get_callback' => 'slug_get_acf',
'update_callback' => null,
'schema' => null,
)
);
}
}
function slug_get_acf( $object, $field_name, $request ) {
return get_fields($object[ 'id' ]);
}
This appends a key called “acf” to the rest api output for all public post types.
Will be easier to customise too if you only want certain fields to be exposed.
