Fields customization

If you are using a custom Prestashop and you need to have additional fields configured in your e-commerce, in order to update that info those fields should be added to the code. That should be done in the file  saleslayerimport.php , adding them into the variable $predefined_product_fields for products. This way, the system will look for all the fields in the products tab at Sales Layer, it looks into that variable (which is case sensitive) and if it doesn’t find them, they will be converted into product characteristics. 

The same can be done with variants with the variable $product_format_base_fields. 

For an advanced customization requiring more changes, there are two files ready, SlProducts.php (for products) and SlVariants.php  (for variants).