Hello,

I need to update an invoice with hidden items (rate = 0) in order to have the inventory updated accordingly, as well as monitoring the full project's economical efficiency.

To do so, I am passing the Zoho CRM customer ID, Project Name, Article ID and name to a function. From there I can find the latest invoice linked to our customer and project.

I then try to update the invoice by adding a single line item with quantity = 1 and rate = 0 but get a code = 4 response :(

Here is the part where I try to update the invoice:

1. if(found_invoice = true)
2.     {
3.         //Found invoice: add item on invoice.
4.         //1. get access_token to use api
5.         access_token = thisapp.getAccessTokenFromRefreshToken();
6.         authorization_string = "Zoho-oauthtoken " + access_token;
7.         //2. List invoices from customer:
8.         parameters_data = {"customer_id":customer_id,"invoice_number":invoice_number,"line_items":[{"item_id":article_id,"name":article,"description":article,"quantity":"1.00","rate":0}]};
9.         headers_data = Map();
10.         headers_data.put("Authorization",authorization_string);
11.         response = invokeurl
12.         [
13.             url :"https://www.zohoapis.eu/books/v3/invoices?organization_id=XXXXXXXXXXX"
14.             type :PUT
15.             parameters:parameters_data.toString()
16.             headers:headers_data
17.             connection:<connection>
18.             content-type:"application/json"
19.         ];
20.         info response;
21.     }
    

Many thanks in advance for your help :).

Kind regards,
Guillaume