Billable Items: Determine the invoice where billable item should be included with

[berstein]

Dear all,

I'm currently building a hook and a module for invoice items grouping and automatic invoice splitting on invoice creation.
I can group invoice items using tblinvoiceitems, but I haven't found a way to group a billable item.
Is there any way to force a billable item to be included in specific invoice?

 

While typing this topic, I had an idea where I use the values from tblbillableitem, add them to my grouping alongside the items from tblinvoiceitems, and modified the value on tblbillableitem when the invoices are generated so they are considered already sent. Please tell me if you have better idea to achieve this.

 

Thank you