PS. I think the code works correctly, but let me know if it doesn't.
On Mon, Feb 29, 2016 at 1:09 PM, Michael Gentry <mgen...@masslight.net> wrote: > Hi Hugi, > > I'm not sure if this will work for 4.0 (since earlier you said you are > using it), but this is what I'd use for 3.1: > > > https://github.com/mrg/cbe/blob/master/FetchingObjects/Aggregates/src/main/java/cbe/fetching/utilities/AggregateUtils.java > > If you have A->>B, you'd construct a SelectQuery to fetch B's where toA = > your A object. Basically, invert your query and count the matches. > Something like: > > SelectQuery selectQuery = new SelectQuery(B.class); > selectQuery.setQualifier(ExpressionFactory.matchExp("toA", a)); > int countOfB = AggregateUtils.count(dataContext, selectQuery); > > Some other example uses: > > > https://github.com/mrg/cbe/blob/master/FetchingObjects/Aggregates/src/main/java/cbe/fetching/Aggregates.java > > mrg > > > On Mon, Feb 29, 2016 at 7:25 AM, Hugi Thordarson <h...@karlmenn.is> wrote: > >> Hi all, >> >> Is there any simple way or me to count the number of destination objects >> of a to-many relationship? (without fetching) If not, is there some way to >> generate an expression from a relationship, so I can use that expression in >> my own counting functions? >> >> Cheers, >> - hugi > > >
