Name of unit of measurements should be unique per category

Hello,

This bug is generated only in stable 6.0 because in trunk version constraint putted in UOM.

Thanks.

Hello Marco,

Its fixed in https://code.launchpad.net/~openerp-dev/openobject-addons/6.0-bug-734686-ado.

It will be merged soon with stable addons branch.

Thanks.

Marco,

Any particular reason you think UoM names should be unique only *per category*? Given that UoMs are like currencies, I would think as their names as being reference "keys", so they should be globally unique, not just within a category.
This would make it even better/easier for external unit conversion.

Or do you have an example where you think using the same UoM name in 2 categories is valid?

PS: I changed status to Confirmed because it does not look like the proposed patch/branch correctly addresses this issue.

BTW, the related fix from trunk came from bug 731035, which I'm not sure was correctly addressed, we may need to reconsider it.

I'm trying hard to remember why I added that "per category".

Even trying to construct a hypothetical case, I can't find any reason.
The only thing that would matter would be equal named units with different meanings, like minutes are time and astronomical angle. But that's way of all use cases I could expect.

I think it was just a mere minimal requirement and can be superseeded by a stronger constraint like "for all".

a reason to do it by category would be: stock unit = kg, purchase unit = pce. Therefor you would define 'pce' in category 'weight' as well....

That's a very (very) specialised case, where ALL products you have are of the same weight, to not mess it up.

Here, we had such a special case, something bought as m³ (cubic metres, had to be called on the purchase order like this) and sold as kg.

I think the common way would have been to do a "unit conversion" by manufacturing, but that was too much overhead.

So we added a unit for m³ to weight. But even here, we wanted to avoid any misunderstandings, esp. with future products that may be added, and called it "m³ (48kg)", thus identifying it uniquely.

Steffi and Marco, thanks for the additional details. I guess this
confirms the general rule, so let's go for that.