What ? GetLastestVersion does not need to know about session, it only need to find the lastestXYZ inside the collection AllVersion.
Are you working with Chris B ? 2010/2/24 Ricardo Peres <[email protected]> > Hi, Fabio! > > Does this mean that you are advocating entities to have knowledge of > ISession, in the GetLastestVersion method? If not, how would we > implement this? > I am not complaining, just wanted to know your opinion! :-) > > Thanks, > > RP > > > > On Feb 24, 3:08 am, Fabio Maulo <[email protected]> wrote: > > private Version latestVersion; > > public virtual Version LatestVersion { > > get{ > > if(lastestVersion == null) > > { > > lastestVersion = GetLatestVersion(this.AllVersions);} > > > > return latestVersion; > > > > } } > > > > When you change something in AllVersions you should call : > > void InvalidateVersions() > > { > > lastestVersion= null; > > > > } > > > > to map it: > > > > <many-to-one name="LatestVersion" access="nosetter.camelcase"/> > > > > 2010/2/23 Chris B <[email protected]> > > > > > > > > > > > > > Fabio, > > > > > I think you are saying I could implement it like this: > > > > > public class Header > > > { > > > public virtual int HeaderId { get; set; } > > > public virtual Version LatestVersion { get{ return > > > GetLatestVersion(this.AllVersions); } } > > > public virtual Version LatestApprovedVersion { get{ return > > > GetLatestApprovedVersion(this.AllVersions); } } > > > public virtual List<Version> AllVersions { get; set; } > > > // other members > > > } > > > > > I had considered this kind of implementation, but the number of > > > version entities can be large and all but two (the latest and latest > > > approved) are very rarely used. I am hoping the AllVersions > > > collection can be loaded only when viewing version history (rare), and > > > not during normal workflow operations (common). I am assuming that > > > accessing the AllVersions collection will load all versions, even if > > > only one Version is being inquired about. So for example, > > > > > Header h = ReadHeader(); > > > Version v = h.AllVersions[4]; // lazy loads all versions into the > > > AllVersions collection, not just the one at index 4 > > > > > I am also not sure where the reference to Invoice.TotalAmmount came > > > from. My entities do not have such a field. > > > > > On Feb 23, 4:00 pm, Fabio Maulo <[email protected]> wrote: > > > > ok... then is easy > > > > You can map the two properties as access="readonly" and in its getter > you > > > > can read your collection to get LastXYZ. > > > > The two properties will be saved as denormalized properties and you > can > > > use > > > > it in any queries. > > > > > > If you want you can map it as access="nosetter.camelcase" and > implements > > > the > > > > getter in order to read from collection when the private field is > null > > > > (Note: when you change the collection adding, removing or changing a > > > member > > > > you should "reset" the LastXYZ). > > > > > > In both case what will result "denormalized" is the DB but in your > model > > > > everything will be auto-protected... > > > > in practice the same you are doing with Invoice.TotalAmmount > > > > > > 2010/2/23 Chris B <[email protected]> > > > > > > > There is also a list of all previous versions in the > > > > > Header.AllVersions property. I had forgotten that I omitted it in > my > > > > > original post. The only use case where this is loaded is when a > user > > > > > requests to view the version history. > > > > > > > The LatestVersion and LatestApprovedVersion references are mainly > for > > > > > efficiency. Most use cases involve either displaying/mutating the > > > > > data of the LatestVersion or reading the data of the > > > > > LatestApprovedVersion. It would be great if we could selectively > load > > > > > those two versions (on demand) without having to load all versions. > > > > > > > Here is an updated entity definition: > > > > > > > public class Header > > > > > { > > > > > public virtual int HeaderId { get; set; } > > > > > public virtual Version LatestVersion { get; set; } > > > > > public virtual VersionLatestApprovedVersion { get; set; } > > > > > public virtual List<Version> AllVersions { get; set; } > > > > > // other members > > > > > } > > > > > > > public class Version > > > > > { > > > > > public virtual int VersionId { get; set; } > > > > > public virtual Header Header { get; set; } > > > > > // other members > > > > > } > > > > > > > Does that help to clarify? > > > > > > > On Feb 23, 11:15 am, Fabio Maulo <[email protected]> wrote: > > > > > > you are showing only LatestVersion and LatestApprovedVersion > > > > > > where are previous ? > > > > > > > > 2010/2/19 Chris B <[email protected]> > > > > > > > > > Hello, > > > > > > > > > I am trying to create a mapping file for entities which look > like > > > the > > > > > > > following: > > > > > > > > > public class Header > > > > > > > { > > > > > > > public virtual int HeaderId { get; set; } > > > > > > > public virtual Version LatestVersion { get; set; } > > > > > > > public virtual VersionLatestApprovedVersion { get; set; } > > > > > > > // other members > > > > > > > } > > > > > > > > > public class Version > > > > > > > { > > > > > > > public virtual int VersionId { get; set; } > > > > > > > public virtual Header Header { get; set; } > > > > > > > // other members > > > > > > > } > > > > > > > > > The database looks almost exactly like this, with the obvious > > > > > > > difference being that instead of object references there are > > > foreign > > > > > > > keys for the latest/latest approved versions pointing to the > > > VersionId > > > > > > > field, and the same for the Header and HeaderId. The table for > the > > > > > > > header does allow both the latest and latest approved version > ids > > > to > > > > > > > be null to allow the Header records to be inserted before the > > > Versions > > > > > > > are created. The insert proc for the Version table takes care > of > > > > > > > updating the Header.LatestVersionId to point at newly inserted > > > version > > > > > > > record. > > > > > > > > > I have thus far been unsuccessful in creating mapping files for > > > this > > > > > > > pattern, the sticking point being the LatestVersion and > > > > > > > LatestApprovedVersion properties. I'm pretty new to NHibernate, > so > > > I > > > > > > > apologize if this is answered in another thread. > > > > > > > > > Any help is much appreciated. Thanks in advance. > > > > > > > > > -- > > > > > > > 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]> > <nhusers%[email protected]<nhusers%[email protected]>> > > > <nhusers%[email protected]<nhusers%[email protected]> > <nhusers%252bunsubscr...@googlegroup s.com> > > > > > > > <nhusers%[email protected]<nhusers%[email protected]> > <nhusers%252bunsubscr...@googlegroup s.com> > > > <nhusers%[email protected]<nhusers%[email protected]> > <nhusers%25252bunsubscr...@googleg roups.com> > > > > > > > > > . > > > > > > > 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]<nhusers%[email protected]> > <nhusers%[email protected]<nhusers%[email protected]>> > > > <nhusers%[email protected]<nhusers%[email protected]> > <nhusers%252bunsubscr...@googlegroup s.com> > > > > > > > . > > > > > 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]<nhusers%[email protected]> > <nhusers%[email protected]<nhusers%[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]<nhusers%[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. 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