使用Nhibernate映射没有主键的单行表

Question

I'm working with a legacy table which I cannot change . The database have a settings table which consists of a lot of columns (one for each setting) and only one row:

Columns: Setting1  | Setting2     | Setting3  | etc...
         ----------+--------------+-----------+-------------
Row1:    SomeValue | AnotherValue | LastValue | etc...

Now, this would be all fine if it wasn't for the fact that the table lacks a primary key. Obviously, the original developer didn't think it was necessary, as there's only one single row.

Is there any way of mapping this with Nhibernate? I've already implemented a SQL based solution, but I'd love to have the flexibility and simplicity gained with Nhibernate.

I'm fearing the worst but, any ideas?

Answer 1

Well, just pick any setting (column) as the Id. The only inconvenience is that if you need to change the setting that is the PK you'll have to delete and re-insert the row...

Answer 2

You could map a view that adds a dummy PK column:

select 1 as SettingsId, Setting1, etc....

or load the object from a stored procedure.