Re: Composite indexes
I don't know whether it is possible, but patches are appreciated. -Markus 2009/4/30 Flominator flomina...@gmx.net Hi Markus, thanks again for your help. What about a feature that would introduce UniqueKey to HasMany. Would you consider that a good idea? Just curious. Regards, Flo On 2 Apr., 11:03, Markus Zywitza markus.zywi...@gmail.com wrote: Make the channelId available as a column in Measurand. A non-update, non-insert property suffices, you need the UniqueKey value only for creating the DDL. -Markus 2009/4/2 Flominator flomina..@gmx.net How do I do that here when I want to make channelid part of the UniqueKey? [HasMany(typeof(Measurand), Table = Measurands, ColumnKey = channelid, Index=Datee)] Thanks, Flo On 1 Apr., 17:11, Markus Zywitza markus.zywi..@gmail.com wrote: Add UniqueKey=some_identifier to all properties whose combination should be unique. -Markus 2009/4/1 Flominator flomina@gmx.net Hi, I'm talking about the following database structure: MEASUREMENTS | --CHANNELS | --- MEASURANDS CHANNELS HasMany MEASURANDS via channel_id (int) MEASURANDS has id in, date (DateTime), value (float) Now I would like to make sure, that there are no MEASURANDS with the same date and channel_id. I don't really know, how to do it. A composite key might be one approach, but I don't want to change every .id call within the programme. I would like to use something like a Composite index, which wouldn't require to change the code at Measurements and other parts of the application. I don't know, if AR/NHibernate supports such thing or if I should try to implement this via business logic. Any suggestions? Thanks, Flo --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Castle Project Users group. To post to this group, send email to castle-project-users@googlegroups.com To unsubscribe from this group, send email to castle-project-users+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/castle-project-users?hl=en -~--~~~~--~~--~--~---
Re: Composite indexes
How do I do that here when I want to make channelid part of the UniqueKey? [HasMany(typeof(Measurand), Table = Measurands, ColumnKey = channelid, Index=Datee)] Thanks, Flo On 1 Apr., 17:11, Markus Zywitza markus.zywi...@gmail.com wrote: Add UniqueKey=some_identifier to all properties whose combination should be unique. -Markus 2009/4/1 Flominator flomina.@gmx.net Hi, I'm talking about the following database structure: MEASUREMENTS | --CHANNELS | --- MEASURANDS CHANNELS HasMany MEASURANDS via channel_id (int) MEASURANDS has id in, date (DateTime), value (float) Now I would like to make sure, that there are no MEASURANDS with the same date and channel_id. I don't really know, how to do it. A composite key might be one approach, but I don't want to change every .id call within the programme. I would like to use something like a Composite index, which wouldn't require to change the code at Measurements and other parts of the application. I don't know, if AR/NHibernate supports such thing or if I should try to implement this via business logic. Any suggestions? Thanks, Flo --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Castle Project Users group. To post to this group, send email to castle-project-users@googlegroups.com To unsubscribe from this group, send email to castle-project-users+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/castle-project-users?hl=en -~--~~~~--~~--~--~---
Re: Composite indexes
Add UniqueKey=some_identifier to all properties whose combination should be unique. -Markus 2009/4/1 Flominator flomina...@gmx.net Hi, I'm talking about the following database structure: MEASUREMENTS | --CHANNELS | --- MEASURANDS CHANNELS HasMany MEASURANDS via channel_id (int) MEASURANDS has id in, date (DateTime), value (float) Now I would like to make sure, that there are no MEASURANDS with the same date and channel_id. I don't really know, how to do it. A composite key might be one approach, but I don't want to change every .id call within the programme. I would like to use something like a Composite index, which wouldn't require to change the code at Measurements and other parts of the application. I don't know, if AR/NHibernate supports such thing or if I should try to implement this via business logic. Any suggestions? Thanks, Flo --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Castle Project Users group. To post to this group, send email to castle-project-users@googlegroups.com To unsubscribe from this group, send email to castle-project-users+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/castle-project-users?hl=en -~--~~~~--~~--~--~---
