On Thu, Dec 4, 2008 at 2:05 PM, Derek Chen-Becker <[EMAIL PROTECTED]>wrote:
> OK, one last question for today before I start hacking at the text: You > mention some methods here for multiple databases with a single entity: On KeyedMetaMapper, override: def dbSelectDBConnectionForFind: PartialFunction[Type, ConnectionIdentifier] = Map.empty The ConnectionIdentifier defines which RDBMS to perform the query on. Also, on Mapper: def dbCalculateConnectionIdentifier: PartialFunction[A, ConnectionIdentifier] = Map.empty > > > http://groups.google.com/group/liftweb/msg/76c965c189a85103?pli=1 > > But looking in the code I can't find those methods. Are they essentially > gone now? You also mentioned something better than sharding but I haven't > seen anything on the list (maybe I missed it). > > Thanks, > > Derek > > > On Thu, Dec 4, 2008 at 4:01 PM, Derek Chen-Becker <[EMAIL PROTECTED]>wrote: > >> Cool. I guess I'm editing my chapter this afternoon now :) >> >> >> On Thu, Dec 4, 2008 at 3:40 PM, David Pollak < >> [EMAIL PROTECTED]> wrote: >> >>> >>> >>> 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 >>> >>> >>> >> > > > > -- 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 -~----------~----~----~----~------~----~------~--~---
