awesome 2011/3/26 Fabio Maulo <[email protected]>
> it is new in NH3.2 > > 2011/3/26 José F. Romaniello <[email protected]> > > wow! didn't know about <subselect /> ... I learn something new about NH >> every day :) >> >> >> 2011/3/26 Fabio Maulo <[email protected]> >> >>> <class name="Blog" mutable="false"> >>> <subselect> >>> SELECT Blog.Id, Blog.Author, Blog.Title, Comment.Comment >>> FROM Blog INNER JOIN Comment ON Blog.Id = Comment.Blog_id >>> WHERE Comment.LanguageId = :blogcomment.languageId >>> </subselect> >>> <id name="Id"> >>> <generator class="assigned" /> >>> </id> >>> <property name="Author" /> >>> <property name="Title" /> >>> <property name="Comment" /> >>> </class> >>> >>> <filter-def name="blogcomment"> >>> <filter-param name="languageId" type="int"/> >>> </filter-def> >>> >>> >>> 2011/3/25 Krzysztof Koźmic <[email protected]> >>> >>>> So I have a one-to-many tables in database that looks like the following >>>> (I'm on NHibernate 3.1): >>>> >>>> blog >>>> id >>>> title >>>> author >>>> >>>> comments >>>> id >>>> blog_Id >>>> languageid >>>> comment >>>> >>>> and I want to map it to a *single* class with *single* comment property >>>> that maps to text column in comments table for current language. >>>> >>>> Basically the idea is identical to one ayende had few years back: >>>> http://ayende.com/Blog/archive/2006/12/26/localizingnhibernatecontextualparameters.aspx >>>> >>>> The difference is I try to accomplish this without subselect but using >>>> <join /> instead (mostly because the table with translations has more >>>> columns than just the text that I may need to include in my joined class). >>>> >>>> So I created a solution for that and I'm also using filter to pass >>>> language id to queries. I also have a noop property in my mapping for the >>>> languageid as well as where clause in my mapping that does the filtering. >>>> >>>> And here's the SQL that NHibernate generates: >>>> >>>> SELECT this_.Id as Id0_0_, >>>> this_.Author as Author0_0_, >>>> this_.Title as Title0_0_, >>>> this_1_.Comment as Comment1_0_, >>>> this_1_.LanguageId as LanguageId1_0_ >>>> FROM Blog this_ >>>> inner join Comment this_1_ >>>> on this_.Id = this_1_.Blog_id >>>> WHERE (this_.LanguageId = 2 /* @p0 */) >>>> >>>> The SQL is invalid as the where should be on this_1_.LanguageId as the >>>> value comes from the joined table, not the main one. >>>> >>>> Also the LanguageId column is mapped as access="noop" which TTBOMK >>>> should mean it won't be queried for so I'm surprised to see NHibernate is >>>> trying to select it as well. To me it is just wasting bandwith. >>>> >>>> So I have two questions now. >>>> >>>> 1. How can I accomplish what I'm trying to get to. >>>> 2. Are those issues I mentioned (invalid where clause and ignoring noop >>>> access) bugs in NHibernate or am I looking at it from the wrong angle? >>>> >>>> Reproduction demo app (along with database dump) available here if >>>> someone wants to play with it: http://ge.tt/5xoiqYY >>>> >>>> cheers, >>>> Krzysztof >>>> >>>> -- >>>> 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. >> > > > > -- > 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.
