Hello,

I believe that the order_id inside the sale.order.line will always be linked to sale.order. Since you are not yet creating the sale.order, the sale.order.line can never be created since it depends on the id of the sale.order itself as "foreign key".

The sale.order and sale.order.line model you inherited might using the model.Models so it needed to be saved first. If you wish to click on your button without creating sale.order, you might want to make that sale.order.line into a transient.Models instead. 

Best regards,

Altela (altelasoftware.com)

Hello Altela,

Thank you for your answer, i will study transient model to know what it is.

In the same way, if i click on my button before select a product in the sale.order.line form, there is a red warning like below

And i don't understand why i need to create S.O and S.O.L or create those elements to open a website (like google.com) in an other browser tab!?

UPDATE :

Here a screen capture below

I create a new sale order and just select a customer

Then, i click on "Add a product"

And in the form of the sale.order.line, i added 2 buttons to open a website with python function like this :

return {
'type': 'ir.actions.act_url',
'target': 'new',
'url': url_interface,
}