[9.0] sale/purchase: Create dummy product

[pedrobaeza]

@StefanRijnhart in the commit 85f767c, you add a method for setting a dummy product in all sale lines without product (method link: 85f767c#diff-daefd2062eec09f4b6a6f29c1233b276R38).

What is the reason behind this? Why they can remain empty?

This is very harmful for several reasons:

• You don't explicitly set no company, so in a multi-company environment, this breaks sales orders in several companies that are not from the admin company. This can be fixed any way setting the extra value 'company_id': False.
• If lines have different uom, you will get errors on some computed fields and reports.

cc @Tecnativa

[pedrobaeza]

@StefanRijnhart can you say anything about this?

[StefanRijnhart]

The reason is that product_id is required on the sale order line in 9.0. Leaving it out causes all kinds of problems. But you are right, that a more advanced setup with multiple products and the correct company setting can be required in some cases.

[legalsylvain]

@pedrobaeza : can we close this one ?

[pedrobaeza]

Well, the underlying problem is still there, as we don't separate products by UoM, but nobody has solved it.