Target Unreachable, '...' returned null on '...'
Dear experts,
my environment is: JBOSS 4.2, seam 2.1, eclipse europa 3.3.2 with jboss tools 2.1.2.
I created 2 classes Bank and User. By reverse engineering, eclipse automatically created BankHome, BankList, UserHome and UserList classes plus the following xhtml files: Bank.xhtml,
BankHome.xhtml, BankList.xhtml etc...
After eclipse reverse engineering, I joined Bank and User classes in a OneToOne relationship:
imports...
/**
* Bank generated by hbm2java
*/
@Entity
@Table(name = "bank", catalog = "df", uniqueConstraints = @UniqueConstraint(columnNames = "billacc"))
public class Bank implements java.io.Serializable {
private int id;
private String billacc;
private User user;
[...]
@OneToOne
@JoinTable(name = "bank_user",
joinColumns = @JoinColumn(name = "idbank"),
inverseJoinColumns = @JoinColumn(name = "iduser"))
public User getUser() {
return user;
}
public void setUser(User user) {
this.user = user;
}
}
and...
imports...
/**
* User generated by hbm2java
*/
@Entity
@SuppressWarnings("serial")
@Table(name = "user", catalog = "df")
public class User implements java.io.Serializable {
private Integer id;
private String firstName;
private String surname;
private String account;
private String password;
private String email;
private boolean isMarried;
private int children;
private Date fromDate;
private Date endDate;
private Float credit;
private Float debt;
private Set<Dutyfreerole> dutyfreeroles;
private Bank bankaccount;
private Set<Invoices> invoices;
private Set<Orders> orders;
[...]
@OneToOne
@JoinTable(name = "bank_user",
joinColumns = @JoinColumn(name = "iduser"),
inverseJoinColumns = @JoinColumn(name = "idbank"))
public Bank getBankaccount() {
return bankaccount;
}
public void setBankaccount(Bank bankaccount) {
this.bankaccount = bankaccount;
}
[...]
}
Then, I want to modify BankList.xhtml adding a search parameter related to user:
[...]
<ui:define name="body">
<h:messages globalOnly="true" styleClass="message" id="globalMessages"/>
<h:form id="bankSearch" styleClass="edit">
<rich:simpleTogglePanel label="Bank Account search parameters" switchType="ajax">
<s:decorate template="../layout/display.xhtml">
<ui:define name="label">Bank Account</ui:define>
<h:inputText id="billacc" value="#{bankList.bank.billacc}"/>
</s:decorate>
<--! BEGIN CODE ADDED BY ME -->
* <s:decorate template="../layout/display.xhtml">
<ui:define name="label">user</ui:define>
<h:inputText id="user" value="#{bankList.bank.user.account}"/>
</s:decorate>
*
<--! END CODE ADDED -->
<div class="actionButtons">
<h:commandButton id="search" value="Search" action="BankList.xhtml"/>
</div>
</h:form>
<rich:panel>
<f:facet name="header">Bank Account search results</f:facet>
<div class="results" id="bankList">
<h:outputText value="No bank account exists"
rendered="#{empty bankList.resultList}"/>
<rich:dataTable id="bankList"
var="bank"
value="#{bankList.resultList}"
rendered="#{not empty bankList.resultList}">
<h:column>
<f:facet name="header">
<s:link styleClass="columnHeader"
value="account #{bankList.order=='account asc' ? messages.down : ( bankList.order=='account desc' ? messages.up : '' )}">
<f:param name="order" value="#{bankList.order=='user.account asc' ? 'user.account desc' : 'user.account asc'}"/>
</s:link>
</f:facet>
#{bank.user.account}
</h:column>
<h:column>
<f:facet name="header">
<s:link styleClass="columnHeader"
value="billacc #{bankList.order=='billacc asc' ? messages.down : ( bankList.order=='billacc desc' ? messages.up : '' )}">
<f:param name="order" value="#{bankList.order=='billacc asc' ? 'billacc desc' : 'billacc asc'}"/>
</s:link>
</f:facet>
#{bank.billacc}
</h:column>
<h:column>
<f:facet name="header">action</f:facet>
<s:link view="/admin/#{empty from ? 'Bank' : from}.xhtml"
value="Select"
id="bank">
<f:param name="bankId"
value="#{bank.id}"/>
</s:link>
</h:column>
</rich:dataTable>
</div>
</rich:panel>
<div class="tableControl">
<s:link view="/admin/BankList.xhtml"
rendered="#{bankList.previousExists}"
value="#{messages.left}#{messages.left} First Page"
id="firstPage">
<f:param name="firstResult" value="0"/>
</s:link>
<s:link view="/admin/BankList.xhtml"
rendered="#{bankList.previousExists}"
value="#{messages.left} Previous Page"
id="previousPage">
<f:param name="firstResult"
value="#{bankList.previousFirstResult}"/>
</s:link>
<s:link view="/admin/BankList.xhtml"
rendered="#{bankList.nextExists}"
value="Next Page #{messages.right}"
id="nextPage">
<f:param name="firstResult"
value="#{bankList.nextFirstResult}"/>
</s:link>
<s:link view="/admin/BankList.xhtml"
rendered="#{bankList.nextExists}"
value="Last Page #{messages.right}#{messages.right}"
id="lastPage">
<f:param name="firstResult"
value="#{bankList.lastFirstResult}"/>
</s:link>
</div>
[...]
</ui:define>
</ui:composition>But if add that code the result is:
Exception during request processing:
Caused by javax.servlet.ServletException with message: /admin/BankList.xhtml @26,79 value=#{bankList.bank.user.account}
: Target Unreachable, 'user' returned null on 'org.bsc.DutyFree.entity.Bank'
What am I doing wrong?
