Might add a bit of Specification pattern to that. At least for those queries that can be written with linq.
/Oskar 2010/6/18 Fabio Maulo <[email protected]>: > My advise: > 1) IRepository (no queriable) > 2) concrete Repository implementation queriable (implements IQueriable) > 3) inside the Repository impl. you are in the "safe area" (the other part of > the app. does not know NH) > 4) depending on the query you can use: LINQ (new in NH3), HQL, QueryOver, > SQL > Do you remember that old times when people said "to write SQL incrustated in > the code, everywhere, is a really bad practices" ? > well... > which is the difference with a LINQ sentence to go to persistence ? > The Repository/DAO is the responsible of DataAccess and one of its most > important responsibility is the construction of the query. > If you move this responsibility out side the Repository/DAO impl you will > have the same identical issue than write SQL everywhere. > On Fri, Jun 18, 2010 at 2:53 AM, Tomasz Modelski (IDev) > <[email protected]> wrote: >> >> I'm using NH trunk version, rev. 4790 from 12.04.2010 on my production >> application, application is still under heavy development and >> deployment (we are working something like agile iterations). >> We are forced to use all NH query providers :-). >> >> There are some situations where old LinqToNH works better then new >> one :-) >> there are some situations where new LingToNh works better then old >> one :-). >> 'Hidden powers' are in new QueryOver api. It's criteria api in Linq/ >> labda style. It works very good, almost error free, but still have >> limitations. >> And hql is the last ultimate solution for all weird raporting queries >> with grouping, HAVING, IN / NOT IN etc. >> >> It would be nice to hear some status report from NH team, maybe some >> blog entry. >> >> Maybe someone from LinqToNH team could make some page / blog entry >> with examples of working & not working queries using new LinqToNH and >> QueryOver. >> It would be very helpfull. >> >> regards, Tomasz Modelski. >> >> ps. lately, I steadily check the >> http://sourceforge.net/projects/nhibernate/develop >> page to see if there are some major Linq improvements and when it's >> worth to get & compile latest trunk. >> >> On 18 Cze, 01:09, Jeffry Morris <[email protected]> wrote: >> > Yes, by my usage scenarios have been very simple to date. Simple joins >> > and >> > projections. I can say that I already surpassed some of the limitations >> > in >> > the older provider, which couldn't even do a join. >> > >> > By this time next month, I'll know more... >> > >> > On Thu, Jun 17, 2010 at 3:49 PM, Craig van Nieuwkerk >> > <[email protected]>wrote: >> > >> > >> > >> > > Have you been able to use Linq almost exclusively for writing queries >> > > now, or do you still go back to ICriteria and HQL occasionally? >> > >> > > On Fri, Jun 18, 2010 at 7:00 AM, Jeffry Morris >> > > <[email protected]> >> > > wrote: >> > > > It's merged with the trunk for NHibernate 3...I have been using it >> > > > for a >> > > few >> > > > weeks and I am very happy :) >> > >> > > -- >> > > You received this message because you are subscribed to the Google >> > > Groups >> > > "nhusers" group. >> > > To post to this group, send email to [email protected]. >> > > To unsubscribe from this group, send email to >> > > >> > > [email protected]<nhusers%[email protected]> >> > > . >> > > For more options, visit this group at >> > >http://groups.google.com/group/nhusers?hl=en.- Ukryj cytowany tekst - >> > >> > - Pokaż cytowany tekst - >> >> -- >> You received this message because you are subscribed to the Google Groups >> "nhusers" 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/nhusers?hl=en. >> > > > > -- > Fabio Maulo > > -- > You received this message because you are subscribed to the Google Groups > "nhusers" 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/nhusers?hl=en. > -- You received this message because you are subscribed to the Google Groups "nhusers" 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/nhusers?hl=en.
