In Cayenne 3.x you can create expression from string:

Expression.fromString("paintings+ = null")


On Mon, Feb 4, 2019 at 12:30 PM Amedeo Mantica <[email protected]>
wrote:

> in Cayenne 3.x ?
>
> > On 4 Feb 2019, at 09:17, Arseni Bulatski <[email protected]>
> wrote:
> >
> > Hi
> > You can do it in that way:
> > Artist.PAINTINGS.outer().isNull()
> >
> >
> >
> > On Sun, Feb 3, 2019 at 10:19 PM Amedeo Mantica
> <[email protected]>
> > wrote:
> >
> >> Hi all,
> >>
> >> Which is the correct Expression to use in order to select objects thats
> >> have an 1:many relationship empty ?
> >>
> >> Thank you
> >> Amedeo
>
>

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