Adding Billable item field to invoice export

[AlexBroz]

Hi all,

 

I would like to simply add another field into the invoices exporting tool found under Reports > Invoices > Exports (invoices.php file).

 

 

This field is called 'description' and relates to the billable item associated with the invoice, an example of this field can be found under Client profile > Billable items. How would I go about adding this to the exporting tool?

[AlexBroz]

I now understand that the billable items table (tblinvoicesitems) relates to the invoices table (tblinvoices) via tblinvoices.id = tblinvoiceitems.invoiceid. Would anyone know how i can add this logic into this reporting tool so that I can add the associated billable item to the invoice.