Cascade Field with Automatic update value

[ClaireB05]

Hi everyone,
I am posting this message because I don't find the answer for my problem which does not seem that hard..
So, I'd like to have in a form 3 fields where :

• 1st could be an option picker named Reference
  -2nd could be a text field named Label
  -3rd could also be a text field named Barcode.

These 3 fields are all in the same table named Product, and I would like to use them to implement another table. The thing is that I'd like to have a cascade system where when I select the Reference, it automatically update the values for the following fields.

I have seen a lot on relationpicker but as the values are in the same table it does not seem to fit (even if I am wrong, then I don't know how to do).
I had also seen a proposal to realize what I mean (#14452) but the value does not appear automatically in the field, you had to click in the list of the option picker for the label for example and it does not suit the use I'd like to have).

If someone knows how to do that, and if it is possible to do it, that would be realllllllly appreciated !
Thanks