[Lazarus] Master-Detail in sqldb broken?
Michael Van Canneyt
michael at freepascal.org
Wed Dec 29 15:01:36 CET 2010
On Wed, 29 Dec 2010, Julio César Gázquez wrote:
> Hi all.
> I have a master detail form, I'm using SQLDB and running a current snapshot
> (Lazarus-0.9.29 rev 28828).
> Retrieving data works Ok. Saving changes doesn't. Googling I found old
> comments in the mailing list saying primary keys must be integers. Is yet
> that the case? If it isn't, component declaration and relevant code follows.
Primary keys do not have to be integers.
> Another issue, when the master have more than 1 record, if I edit the detail,
> then move around in the master, detail changes are lost. IIRC this works fine
> in dbExpress. It is a bug or a design limitation of sqldb?
This is because updates are cached by default.
You must save all updates (applyupdates) in the OnBeforeClose event of the detail dataset.
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