Question

I am not sure if this is possible, but maybe someone could advise.

We have records set up in our system as follows:

Product_ID | Product_Name | Product_Price | Original_Product_ID 

when a product is modified a new record is created with a reference to the previous encarnation in the Original_Product_ID field.

What I want to do is pass in a Product_ID (Current) and return the product which this came from, in some cases this will return the same as is passed in, in other cases I will need to loop through a number of records.

Please can someone advise on this…

Answer 1

Do you need something like (non-recursive solution)?

Product GetOriginalProductById(int productId)
{
    Product p = GetProductById(productId);

    while (p.OriginalId != null && p.Id != p.OriginalId)
    {
        p = GetProductById(p.OriginalId);
    }

    return p;
}