Dynamically set maximum allowed rows on a repeater field on form render

To set the max-row limit on a repeater dynamically — based on user role, current data, or any other runtime condition — modify the field’s settings in af/field/before_render before the field renders.

The name= variant of the filter is the cleanest way to target a specific repeater:

add_filter( 'af/field/before_render/name=YOUR_REPEATER_FIELD_NAME', function ( $field, $form, $args ) {

    // Replace this with whatever condition you need to gate on.
    $should_limit = true;

    if ( $should_limit ) {
        $field['max'] = 2;
    }

    return $field;

}, 10, 3 );

Replace YOUR_REPEATER_FIELD_NAME with the ACF field name of the repeater you want to limit, and $should_limit with the real condition (e.g. a wp_get_current_user() role check, a per-form-args flag, a per-post count).

The min and layout settings can be overridden the same way — anything that’s part of the ACF field config can be patched in before_render.