There's no direct API to achieve that, but you can still figure it
from mapping metadata. Check whether a DbAttribute on the to-many side
of the relationship (i.e. the foreign key) allows null. There are a
few exceptions from this rule [1], but generally this should be an
indicator of whether a given to-one is optional.
You can get access to the mapping metadata in runtime via
context.getEntityResolver().
Andrus
[1] http://objectstyle.org/cayenne/lists/cayenne-user/2007/11/0097.html
On Dec 1, 2007, at 3:50 AM, Jean-François Smigielski wrote:
Hello, list!
I am using Cayenne 3.0M1 on top of a Sun JVM 6.0 (I vote for java
1.5 at
least support:).
Is it possible to determine, from the application point of view, if
the
to-one side of a "1-*" relationship accept NULL values?
--
JF Smigielski
