Hi,

i want to set null-constraints on several strings my problem is that when i pass a empty string (e.g. persisting an entity) this constraints does not fire. But i dont want to set every empty string to null by hand before i persist my entity so the constraints fires.
are there any best practises or better workarrounds? btw im using mysql.

thx for your help kukudas

An empty string is not the same as a null value. Although searching on the net will reveal different opinions on this matter. Particularly in the Oracle world. Here is some fun reading: http://forums.thedailywtf.com/forums/t/1225.aspx

If you need a central place to check/convert empty strings to null, I think the best bet is to implement an Interceptor. See http://www.hibernate.org/hib_docs/v3/ap ... eptor.html