On Jun 24, 2010, at 3:18 AM, Paul Hoadley wrote: > Hello, > > Today I ran into the following problem: > > 1. I have an entity with a 'note' attribute which uses the 'longText' > prototype from (PostgreSQL) ERPrototypes. 'longText' has external type > VARCHAR, and data type 'String (RTRIM) - String c'. 'note' is an attribute > used for locking.
Is there a chance that it just the wrong data type? IIRC, this was added for (I think) Oracle which automatically did this trimming at the database level. If EOF did not also do it, trailing spaces caused this problem. > 2. A user has apparently entered some text into the 'note' attribute of an > EO with a trailing space. The trailing space made it to the database. Just > by a stroke of luck, I managed to see it while nosing around with psql. (If > I hadn't, I imagine I'd still be scratching my head.) > > 3. The WHERE clause generated at update time checks for that string _without > a trailing space_. > > 4. An optimistic locking failure ensues. > > Is this expected? What does the 'RTRIM' in that data type mean—that is, > _when_ is there trimming? I take it there's no trimming for an INSERT, or > that trailing space wouldn't have made it out to the database. As a > workaround, I was going to unselect 'note' as an attribute used for locking. Sounds like a sketchy implementation, but if the database trims on insert/update, EOF would only need to do this for the WHERE clause. Which is what you are seeing. As the database is obviously NOT doing this trim, I will gently suggest that the prototype has the incorrect data type. Chuck -- Chuck Hill Senior Consultant / VP Development Practical WebObjects - for developers who want to increase their overall knowledge of WebObjects or who are trying to solve specific problems. http://www.global-village.net/products/practical_webobjects
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