How to update multiple components (selectOneMenu) with depending objects relations?

jsf, jsf-2, primefaces, selectonemenu

Solution

You basically need to clear out the `selectedCar` value. You can use `<p:ajax listener>` for this.

<p:ajax listener="#{myBean.clearSelectedCar}" update="carSel tireSel" />

with

public void clearSelectedCar() {
    selectedCar = null; // You might want to clear selectedTire as well.
}

Otherwise the old selected value will still retain in the bean and the list of tires will still depend on that.

Problem

i have the following (self-explanatory) entity-relation: ``` * Manufacturer * Car (Manufacturer.getCars()) * Tire (Car.getTires()) ``` MyBean ``` private List<Manufacturer> allManufacturers private Manufacturer selectedManufacturer private Car selectedCar private Tire selectedTire ``` xhtml ``` <p:selectOneMenu id="manufacturerSel" value="#{myBean.selectedManufacturer}" converter="#{manufacturerConverter}"> <f:selectItem itemLabel="None" itemValue="#{null}" /> <f:selectItems value="#{myBean.allManufacturers}" /> <p:ajax update="carSel tireSel" /> </p:selectOneMenu> <p:selectOneMenu id="carSel" value="#{myBean.selectedCar}" converter="#{carsConverter}" disabled="#{empty myBean.selectedManufacturer.cars}"> <f:selectItem itemLabel="None" itemValue="#{null}" /> <f:selectItems value="#{myBean.selectedManufacturer.cars}" /> <p:ajax update="tireSel" /> </p:selectOneMenu> <p:selectOneMenu id="tireSel" value="#{myBean.selectedTire}" converter="#{tiresConverter}" disabled="#{empty myBean.selectedCar.tires}"> <f:selectItem itemLabel="None" itemValue="#{null}" /> <f:selectItems value="#{myBean.selectedCars.tires}" /> </p:selectOneMenu> ``` - the last two `p:selectOneMenu` should be updated depending on the selection in the first one - The last `p:selectOneMenu` with ID `tireSel` is not being updated correctly - All the to-be-updated components are inside the same `NamingContainer` - the `carSel` gets updated, but the values loaded in `tireSel` are strange (seem to be valid for the last request) - i also tried `update="@form"` in `manufacturerSel` EDIT To show which EL Version is used: Here´s an excerpt of my pom.xml ``` <dependency> <groupId>javax.faces</groupId> <artifactId>javax.faces-api</artifactId> <version>2.1</version> </dependency> <dependency> <groupId>org.glassfish</groupId> <artifactId>javax.faces</artifactId> <version>2.1.12</version> </dependency> <dependency> <groupId>javax.el</groupId> <artifactId>el-api</artifactId> <version>2.2</version> <scope>provided</scope> </dependency> ```

Original source