A lot of issue with "It is not possible to unreserve more products of ... than you have in stock".
It's the result of a desynchronisation between
`stock.move.line`.`reserved_qty` and `stock.quant`.`reserved_quantity` fields.
It should never happens in theory. However we already faced it a lot due
to bugs/custom code/server actions... It's not trivial to fix because
the issue come from data corruption. So it is hard to spot the different
main issues.
In order to avoid it, this commit try to modify the structure of stock
module. Before the operations was made in this order:
- The `stock.move` checks the quantity available on `stock.quant`
- The `stock.move` write the quantity reserved on the `stock.quant` and
save it in a variable
- The `stock.move` create a `stock.move.line` with the quanity reserved.
The main issue is that a `stock.move.line` could be easily created with
a reserved quantity while the `stock.quant` are not update nor checked.
After this commit the operations will be:
- The `stock.move` checks the quantity available
- The `stock.move` dispatch the available quantity among the `stock.move.line`
based on create or write calls.
- The `stock.move.line` reserve the quantity on `stock.quant`
- If the quantity is bigger than available, we write the max available on
`stock.move.line`
The idea is to respect the different layers
`stock.move` <-> `stock.move.line` <-> `stock.quant`.
Avoid the interactions bewteen `stock.move` and `stock.quant`
This behavior is already well managed in other use cases.
E.g. the real quantity itself, `_do_unreserve` of `stock.move`,...
opw - a lot
Part-of: odoo/odoo#115328
Arnold Moyaux
7d9d6e8834