Modifications in Original Code

Unless you made the changes by using Jigoshop template files within a child theme then yes they will be overwritten.

Please provide the code here and development can check it and see if it may be something to implement.

I created a new field ‘cost’ in jigoshop_product_class and added relevant code to make it work. But I did not add code to one place instead added one or two lines to few different files.

Hi. I am now trying to implement this functionality as a plugin. The question which I want to ask is, I want to add an extra public member to jigoshop_product Base class. How can I achieve this in a plugin?