Dear all,

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.DatabaseExcepti on
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]


This is the JSF: 
    <h:form id="formID">  
                        <h:panelGrid columns="3">  
 
                            <rich:validator >  
 
                                <h:outputText value="Firstname: " />  
                                <h:inputText id="firstname" value="#{localUserEJB.user.firstName}" label="click to enter your firstname" required="true" requiredMessage="Firstname is required" >  
                                    <f:validateLength minimum="3" />  
                                </h:inputText>  
                                <rich:message for="firstname" ajaxRendered="true" />  
 
                                <h:outputText value="Lastname " />  
                                <h:inputText id="lastname" value="#{localUserEJB.user.lastName}" label="click to enter your lastname" required="true" requiredMessage="Lastname is required" >  
                                    <f:validateLength minimum="3" />  
                                </h:inputText>  
                                 <rich:message for="lastname" ajaxRendered="true" />  
 
                                <h:outputText value="Email " />  
                                <h:inputText id="email" value="#{localUserEJB.user.email}" required="true" readonly="true" />  
                                 <h:outputText value=" " />  
 
                                 <h:outputText value="Group " />  
                                <h:inputText id="group" value="#{localUserEJB.group}" required="true" readonly="true" />  
                                 <h:outputText value=" " />  
 
 
 
                                <rich:message for="confirm" ajaxRendered="true" />  
                                <h:outputLabel for="group" value="Group"  rendered="#{request.isUserInRole('SUPERADMINISTRATOR')||request.isUserInRole('ADMINISTRATOR')}" />  
                                <h:selectOneMenu id="SgroupName" value="#{localUserEJB.group}" required="true" requiredMessage="Please select a group." rendered="#{request.isUserInRole('SUPERADMINISTRATOR')}">  
                                    <f:selectItem itemValue="#{null}" itemLabel="-- select one --" />  
                                    <f:selectItem itemValue="SUPERADMINISTRATOR" itemLabel="SUPERADMINISTRATOR"  />  
                                    <f:selectItem itemValue="ADMINISTRATOR" itemLabel="ADMINISTRATOR" />  
                                    <f:selectItem itemValue="UPLOADUSER" itemLabel="UPLOADUSER" />  
                                    <f:selectItem itemValue="USER" itemLabel="USER" />  
                                </h:selectOneMenu>  
                                <h:selectOneMenu id="AgroupName" value="#{localUserEJB.group}" required="true" requiredMessage="Please select a group." rendered="#{request.isUserInRole('ADMINISTRATOR')}">  
                                    <f:selectItem itemValue="#{null}" itemLabel="-- select one --" />  
                                    <f:selectItem itemValue="ADMINISTRATOR" itemLabel="ADMINISTRATOR" />  
                                    <f:selectItem itemValue="UPLOADUSER" itemLabel="UPLOADUSER" />  
                                    <f:selectItem itemValue="USER" itemLabel="USER" />  
 
                                </h:selectOneMenu>  
                            </rich:validator>  
                            <rich:notifyMessages stayTime="2000" nonblocking="true" />  
                        </h:panelGrid>  
                        <h:inputHidden value="#{localUserEJB.user.email}" />  
                        <h:inputHidden value="#{localUserEJB.group}"  rendered="#{request.isUserInRole('UPLOADUSER')||request.isUserInRole('USER')}"  />  
                        <a4j:commandButton value="Modify" action="#{localUserEJB.writeModification()}"/>  
                    </h:form>

The EJB:
     public void writeModification() {  
            System.out.println(user + " " + principal + " " + group);  
            //String password = user.getPassword();  
            oldData = localuserDAO.find(user.getEmail());  
 
    //        if (!password.isEmpty()) {  
    //            password = DigestUtils.sha512Hex(password);  
    //            user.setPassword(password);  
    //        } else {  
    //            user.setPassword(oldData.getPassword());  
    //        }  
 
            if (!oldData.getFirstName().equals(user.getFirstName())) {  
                user.setFirstName(user.getFirstName());  
            }  
            if (!oldData.getLastName().equals(user.getLastName())) {  
                user.setLastName(user.getLastName());  
            }  
 
            List<Group> groups = new ArrayList<Group>();  
            groups.add(Group.valueOf(group));  
            user.setGroups(groups);  
 
 
            localuserDAO.modify(user, principal);  
            addMessage("User " + user.getLastName() + " updated succesfully");  
 
        }

And the DAO:
 public void modify(LocalUser user, String principal) {  
        System.out.println(principal);  
        em.merge(user);  
        LocalUser u = em.find(LocalUser.class, user.getEmail());  
        if (!u.getGroups().isEmpty()) {  
            if (u.getGroups().get(0).toString().equals("UPLOADUSER") || u.getGroups().get(0).toString().equals("USER")) {  
                setCreator(user.getEmail(), principal);  
            }  
        }  
    }

Isn't possible to update only some entities?

Thanks

--- Update ---

For the moment I solved in this mode.

For the password:

 public void writePasswordModification() {
        String password = user.getPassword();
        localuserDAO.modifyPassword(user.getEmail(), password);
        addMessage("User " + user.getLastName() + " updated succesfully");
 
    }
public void modifyPassword(String email, String password) {
        LocalUser user;
        user = find(email);
        if (!password.isEmpty()) {
            password = DigestUtils.sha512Hex(password);
            user.setPassword(password);
            em.merge(user);
        }
    }

And for the other user data:

 public void writeModification() {
        oldData = localuserDAO.find(user.getEmail());
 
        user.setPassword(oldData.getPassword());
        if (!oldData.getFirstName().equals(user.getFirstName())) {
            user.setFirstName(user.getFirstName());
        }
        if (!oldData.getLastName().equals(user.getLastName())) {
            user.setLastName(user.getLastName());
        }
 
        List<Group> groups = new ArrayList<Group>();
        groups.add(Group.valueOf(group));
        user.setGroups(groups);
 
        localuserDAO.modify(user, principal);
        addMessage("User " + user.getLastName() + " updated succesfully");
    }

public void modify(LocalUser user, String principal) {
        em.merge(user);
        LocalUser u = em.find(LocalUser.class, user.getEmail());
        if (!u.getGroups().isEmpty()) {
            if (u.getGroups().get(0).toString().equals("UPLOADUSER") || u.getGroups().get(0).toString().equals("USER")) {
                setCreator(user.getEmail(), principal);
            }
        }
    }

I don't know if its correct, but works.