On Thu, Dec 4, 2008 at 7:33 AM, Derek Chen-Becker <[EMAIL PROTECTED]>wrote:
> I'm mostly done with the rough draft of our Record/Mapper chapter and I > wanted to clarify a few points to make sure that my reading of the docs and > code is accurate: > > 1. ByRef appears to me to essentially be an old-style join (using the > where clause instead of join syntax). Is that accurate? Are there other use > cases? > > This allows you to compare two columns in the same row. Because mapper does not allow for explicit joins or queries against more than one table at once (with the exception of the In construct), there's no "old style join" stuff. I've also changed the Join() QueryParam to PreCache... which is more descriptive of what it does. > > 1. > 2. It looks like the only way to get distinct results would be to use > the findAllByPreparedStatement or findAllByInsecureSql methods. Is there > some other way to do this that I'm missing? > > Or perhaps the Distrinct() QueryParam I just added. :-) > > 1. > 2. The toForm method in Mapper has an overload that takes a > redoSnippet. What is the use case for this? > > So you can keep the current state around over the course of multiple form submissions when the validation fails. > > 1. Will it be supported in Record or has that functionality been folded > into something else? > > I hope it will make it into Record/Field. > > 1. > 2. It appears that the functionality of the buildSet... methods in > MappedField has effectievly been replaced by the setFromAny in Field. Is > this the case, or will those buildSet functions show back up in some > subclass of field (it seems like there was a lot of overlap there) > > buildSet is JDBC specific and radically improves performance in converting a JDBC column to something that can be put into a field. > > 1. > 2. Am I reading correctly that Record no longer retains the orginal > value of a field when it's changed, but rather just flags the field as > dirty? (there are no is/was methods on Field) > > Probably... but there will be is/was on Field. It's a very helpful construct. > > 1. > > These last two make sense to me since it seems like duplicated effort for > #4 and not much of a use case on #5 that I can think of. Any info or > comments would be appreciated! Sure... wait a few minutes for my Distinct() checkin to make it to GitHub > > > Thanks, > > Derek > > > > -- Lift, the simply functional web framework http://liftweb.net Collaborative Task Management http://much4.us Follow me: http://twitter.com/dpp Git some: http://github.com/dpp --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Lift" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/liftweb?hl=en -~----------~----~----~----~------~----~------~--~---
