How to Join in TopLink

Question

Hi,
This is maybe dummy question, but i don't have idea how i can do this.
Basicly we can view data from database table easly using ADFand EJB-TopLink.
For example (using HR schema, employee and department table) we can drag employee datacontrol into ADF readonly table.
But what about if i want to view department name in one table ?
In short, my problem is similiar like join employee and department table and show the result using ADF table.
Best Regards
YM : callme_harry
Blog : http://harry-christian.blogspot.com

Answer 1

I think you picked up the wrong department field - you need to pick the department that is under the Employees object.
Here is the code in my JSF
            <af:table value="#{bindings.Employees.collectionModel}" var="row"
                      rows="#{bindings.Employees.rangeSize}"
                      emptyText="#{bindings.Employees.viewable ? 'No rows yet.' : 'Access Denied.'}"
                      fetchSize="#{bindings.Employees.rangeSize}"
                      selectedRowKeys="#{bindings.Employees.collectionModel.selectedRow}"
                      selectionListener="#{bindings.Employees.collectionModel.makeCurrent}"
                      rowSelection="single">
              <af:column sortProperty="commissionPct" sortable="true"
                         headerText="#{bindings.Employees.hints.commissionPct.label}">
                <af:outputText value="#{row.commissionPct}">
                  <af:convertNumber groupingUsed="false"
                                    pattern="#{bindings.Employees.hints.commissionPct.format}"/>
                </af:outputText>
              </af:column>
              <af:column sortProperty="employeeId" sortable="true"
                         headerText="#{bindings.Employees.hints.employeeId.label}">
                <af:outputText value="#{row.employeeId}">
                  <af:convertNumber groupingUsed="false"
                                    pattern="#{bindings.Employees.hints.employeeId.format}"/>
                </af:outputText>
              </af:column>
              <af:column sortProperty="firstName" sortable="true"
                         headerText="#{bindings.Employees.hints.firstName.label}">
                <af:outputText value="#{row.firstName}"/>
              </af:column>
              <af:column sortProperty="salary" sortable="true"
                         headerText="#{bindings.Employees.hints.salary.label}">
                <af:outputText value="#{row.salary}">
                  <af:convertNumber groupingUsed="false"
                                    pattern="#{bindings.Employees.hints.salary.format}"/>
                </af:outputText>
              </af:column>
              <af:column sortProperty="departmentName" sortable="true"
                         headerText="#{bindings.Employees.hints.departments.departmentName.label}">
                <af:outputText value="#{row.departments.bindings.departmentName.inputValue}"/>
              </af:column>
            </af:table>