Conditional Display of Custom Fields in Checkout

I run a site that does registrations and equipment orders for a sports club. As part of the checkout process additional information is requested for program registrations (emergency contact, etc) which is not desirable when ordering only equipment. I would like to be able to manipulate the display/input of custom fields in the checkout based on the contents of the cart. My expected approach is to modify the checkout/custom_fields.php view to select which fields are displayed based on the ordered products.

Is there a straightforward method for checking the contents of the cart within the checkout/custom_fields.php view so that the information can be used in conditional statements?

That's the correct approach.
The cart products should be available in the variable $this->rows

So you could have some foreach on it, like that:
$myproduct_in_the_cart=false;
foreach($this->rows as $row){
if($row->product_code =="myproduct"){
$myproduct_in_the_cart=true;
}
}

Thanks very much for the reply.

I have tried the code in custom_fields.php, terms.php and cart.php. In the custom_fields.php and terms.php I get the following error:

"Warning: Invalid argument supplied for foreach() in /home/gohsa/public_html/dev/templates/go-hsa/html/com_hikashop/checkout/terms.php on line 23"

In cart.php the code works as desired. Any suggestions as to what else needs to be changed to provide access to the cart information in custom_fields.php and terms.php?

ah yes, that's because you're not displaying the views together like it is by default so the cart is not loaded by the system. You will have first to load the cart manually like that:
$cartClass = hikashop_get('class.cart');
$cart = $cartClass->loadFullCart(true);
$this->rows =& $cart->products;

That works. Thank you very much.

I would like to do something similar except I would like to not just hide the fields but hide the entire step. My checkout has Fields as a single step. When I hide the fields I just end up with an empty step.

I'm guessing I need to edit the step.php file. How should I go about this and are there any other issues in just hiding a step?
For example if a field is required, do I need to handle this also?

Hi,

If you want to remove the whole fields step conditionally, the best will be to create a joomla system plugin which would include the hikashop helper, do your checks, load the config of HikaShop and set the "checkout" of the config based on the result of your checks.
If you remove the whole fields step directly like that, the system won't do any checks on the fields data during the checkout so even if they are required it won't bug you.
If you try to do it via the views like explained on that thread and that you have required fields, the checkout controller won't let you proceed to the next step and you will have to hack the controller. So I would recommend the joomla system plugin overriding the config setting.