I don't understand the merge use. I've a USER table with firstname, lastname, email and password entities. So I want to create different JSF pages to modify separately password and the other data.
But I cannot, because when I try to submit the JSF form with user data modification I receive the error:
Caused by: Exception [EclipseLink-4002] (Eclipse Persistence Services - 2.3.2.v20111125-r10461): org.eclipse.persistence.exceptions.DatabaseException
Internal Exception: java.sql.SQLIntegrityConstraintViolationException: Column 'PASSWORD' cannot accept a NULL value.
Error Code: -1
Call: UPDATE LOCALUSER SET LASTNAME = ?, PASSWORD = ? WHERE (EMAIL = ?)
bind => [3 parameters bound]