* Failing test for one2many [(5,)] action, when domain is callable.
The problem is that `self` inside a callable domain becomes the comodel when at [(5,)].
* [FIX][fields] Make [(5,)] with computed domain work.
To reproduce this failure, declare a field like:
```
child_ids = fields.One2many(
comodel_name="other.model",
domain=lambda self: [("id", "in", self._ids_to_find())],
)
```
Now set some value to it.
Now unset them. Impossible because ``self`` becomes ``other.model`` in domain evaluation.
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