Force product type for all products

// Disable the product type drop down. 

add_filter('wcv_disable_product_type', function() { return true; } );

/**

 * Hook into the form and output a hidden field that sets the product type. 

 */

add_action( 'wcv_after_product_type', 'wcv_set_product_type' ); 

function wcv_set_product_type( $object_id ){ 

	WCVendors_Pro_Product_Form::product_type_hidden( $object_id, 'appointment' );

}