[jboss-user] [JBoss Seam] - Weird behavior editing Entity with @ManyToMany and Ajax4JSF

[fernando_jmt]

Hi Folks.

After several days trying to found a reason to the problem I will describe here I gave up.

Maybe someone here had a similar problem or can see WTF I'm doing wrong.

I have a seam application and I'm using Ajax4JSF to perform some validations using a4j:support. I took as base the booking example of seam.

The problem is when I try to edit a simple entity in a conversation, the entity is a User entity (username, firstname, lastname) and this entity has a @ManyToMany relationship with a Role entity, this relationship is displayed as checkboxes in the page and here I'm using s:convertEntity to make this work.  All works fine without a4j:support in the input fields. But, when I add the a4j:support to some field, then the entity is persited in the database every time a a4j request is done (a4j:support onblur). This means every time I press the tab key in the form page I can see something like this in the server console:


  | Hibernate: update users set password=?, firstname=?, lastname=?, email=?, version=?, country=?, city=?, province=?, street=
  | ?, enabled=? where username=? and version=?
  | Hibernate: update users set password=?, firstname=?, lastname=?, email=?, version=?, country=?, city=?, province=?, street=
  | ?, enabled=? where username=? and version=?
  | Hibernate: update users set password=?, firstname=?, lastname=?, email=?, version=?, country=?, city=?, province=?, street=
  | ?, enabled=? where username=? and version=?
  | Hibernate: update users set password=?, firstname=?, lastname=?, email=?, version=?, country=?, city=?, province=?, street=
  | ?, enabled=? where username=? and version=?
  | Hibernate: update users set password=?, firstname=?, lastname=?, email=?, version=?, country=?, city=?, province=?, street=
  | ?, enabled=? where username=? and version=?
  | Hibernate: update users set password=?, firstname=?, lastname=?, email=?, version=?, country=?, city=?, province=?, street=
  | 

But, I did not press any button or submit the form, and even the action (seam component) is never called.


Here is my code:

User entity:

  | 
  | @Entity
  | @Table(name = "users")
  | @Name("user")
  | public class User implements Serializable {
  | 
  |     private static final long serialVersionUID = 1559233654671826129L;
  | 
  |     @Id
  |     @Column(name = "username")
  |     @Length(max = 50)
  |     @NotNull
  |     private String username;
  | 
  |     @Column(name = "password", nullable = false)
  |     @Length(min = 6, max = 200)
  |     @NotNull
  |     private String password;
  | 
  |    
  |     @Column(name = "firstname", nullable = false)
  |     @NotNull
  |     @Length(max = 80)
  |     private String firstName;
  | 
  |     @Column(name = "lastname", nullable = false)
  |     @NotNull
  |     @Length(max = 80)
  |     private String lastName;
  | 
  |    
  | 
  |     @Version
  |     @Column(name = "version")
  |     private long version;
  | ...
  | 
  | 
  |     @ManyToMany(fetch = FetchType.LAZY)
  |     @JoinTable(
  |             name = "userrole",
  |             joinColumns = @JoinColumn(name = "username"),
  |             inverseJoinColumns = @JoinColumn(name = "name")
  |     )
  |     @OrderBy("name asc")
  |     private List<Role> roles;
  | ....
  | 



Edit xhtml page:

  | 
  | <ui:define name="body">
  |     <h:form id="userForm">
  |             <h:commandButton action="#{userAction.update}" value="#{messages['Common.save']}"
  |           styleClass="button" />
  | 
  | 
  | <a4j:commandButton action="#{userAction.cancel}" value="#{messages['Common.cancel']}"
  |           styleClass="button" immediate="true"/>
  |         </div>
  | 
  |         <rich:panel id="formPanel">
  |             <f:facet name="header">#{messages['User.edit']}</f:facet>
  | 
  |             <s:decorate id="usernameDecorate" template="/include/viewField.xhtml">
  |                 <ui:define name="label">#{messages['User.username']}</ui:define>
  |                 #{user.username}
  |             </s:decorate>
  | 
  | 
  |             <s:decorate id="firstNameDecorate" template="/include/inputField.xhtml">
  |                 <ui:define name="label">#{messages['User.firstName']}</ui:define>
  | 
  |                 <h:inputText id="firstName" value="#{user.firstName}" required="true"
  |                              maxlength="80" tabindex="4" styleClass="input">
  |                     <a4j:support event="onblur" reRender="firstNameDecorate"/>
  |                 </h:inputText>
  | 
  |             </s:decorate>
  | 
  | 
  |             <s:decorate id="lastNameDecorate" template="/include/inputField.xhtml">
  |                 <ui:define name="label">#{messages['User.lastName']}</ui:define>
  | 
  |                 <h:inputText id="lastName" value="#{user.lastName}" required="true"
  |                              maxlength="80" tabindex="5" styleClass="input">
  |                     <a4j:support event="onblur" reRender="lastNameDecorate"/>
  |                 </h:inputText>
  | 
  |             </s:decorate>
  | 
  |              //If I remove below field, all works fine
  |             <s:decorate template="/include/inputField.xhtml">
  |                 <ui:define name="label">#{messages['User.assignRoles']}</ui:define>
  |                 <h:selectManyCheckbox value="#{user.roles}" id="userRoles" tabindex="13" styleClass="checkBox">
  |                     <s:selectItems value="#{roleList}" var="role" label="#{messages[role.description]}"/>
  |                     <s:convertEntity/>
  |                 </h:selectManyCheckbox>
  |             </s:decorate>
  | 
  |         </rich:panel>
  | 
  | 
  |     </h:form>
  | 
  | 
  | 

User action component

  | 
  | @Stateful
  | @Name("userAction")
  | @Scope(ScopeType.CONVERSATION)
  | @Restrict("#{s:hasRole('admin')}")
  | public class UserAction implements Serializable, IUserAction {
  | 
  |     private static final long serialVersionUID = -8072889837049283608L;
  | 
  | 
  | 
  |     @In
  |     private EntityManager entityManager;
  | 
  |     @In(required = false)
  |     @Out(required = false)
  |     private User user;
  | 
  |     @In
  |     private FacesMessages facesMessages;
  | 
  | 
  |  
  |     @Begin(ifOutcome = "userEdit")
  |     public String select(User selectedUser) {
  |         log.debug("selecting user");
  |         try {
  | 
  |             user = entityManager.find(User.class, selectedUser.getUsername());
  | 
  |             user.setConfirmPassword(user.getPassword());
  |             setOriginalPassword(user.getPassword());
  |             return "userEdit";
  | 
  |         } catch (EntityNotFoundException e) {
  |             facesMessages.addFromResourceBundle(FacesMessage.SEVERITY_INFO,
  |                     "Common.error.notFound", selectedUser.getFullName());
  |             return "userList";
  |         }
  |     }
  | 
  |   
  | 
  |     @End
  |     public String update() {
  |         try {
  |             entityManager.merge(user);
  | 
  |         } catch (OptimisticLockException e) {
  |             user = currentUser;
  |             facesMessages.addFromResourceBundle(FacesMessage.SEVERITY_ERROR, "Common.error.concurrency");
  |             return null;
  |         }
  |         facesMessages.addFromResourceBundle(FacesMessage.SEVERITY_INFO,
  |                 "Common.message.updated", user.getFullName());
  | 
  |         return "userList";
  |     }
  | 
  | 
  |     @End
  |     public String cancel() {
  |         return "userList";
  |     }
  | 
  | 
  | 

Maybe you are thinking that this post should be done in Ajax4JSF forum, but I'm not sure about this, because it seems like a em.merge() is done, but I don't know by whom. Anyway I hope you can give some hints in order to solve this problem.


Thanks in advance.




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