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FacesException: DataModel must implement org.primefaces.model.SelectableDataModel when selection is enabled

I'm trying to learn PF, so I started by displaying the datatable first data and going to the next page in the rowClick run options, but was stuck with the following error. I found a similar problem for this question, but so far no luck. I hope someone helps me.

I get the following error:

DataModel must implement org.primefaces.model.SelectableDataModel when selection is enabled.

Caused by:
javax.faces.FacesException - DataModel must implement org.primefaces.model.SelectableDataModel when selection is enabled.

my page:

 <?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"
    xmlns:ui="http://java.sun.com/jsf/facelets"
    xmlns:f="http://java.sun.com/jsf/core"
    xmlns:h="http://java.sun.com/jsf/html"
    xmlns:p="http://primefaces.org/ui">

<h:head>
<title>Primefaces 3.1</title>

</h:head>
<h:body>
    <h:form id="form">          
            <p:dataTable value="#{tableBean.cars}" var="var" rowkey="#{var.model}" 
            selection="#{tableBean.car}" selectionMode="single">
            <p:column>  <f:facet name="header">
                                <h:outputText styleClass="outputText" value="Model"></h:outputText>
                            </f:facet>
                            <h:outputText styleClass="outputText"
                                value="#{var.model}"></h:outputText>
                        </p:column>
                        <p:column>
                            <f:facet name="header">
                                <h:outputText styleClass="outputText" value="Color"></h:outputText>
                            </f:facet>
                            <h:outputText styleClass="outputText"
                                value="#{var.randomColor}"></h:outputText>
                        </p:column></p:dataTable>                               
        </h:form>
</h:body>
</html>

my bean Classes:

@ManagedBean
@ViewScoped
public class TableBean extends ListDataModel<Car> implements SelectableDataModel<Car>{

    private List<Car> cars;
    private Car car;

    public List<Car> getCars() {

        cars = new ArrayList<Car>();
        Car car1 = new Car();
        car1.setModel("BMW");
        car1.setRandomColor("Black");
        cars.add(car1);
        Car car2 = new Car();       
        car2.setModel("Audi");
        car2.setRandomColor("White");
        cars.add(car2);

        return cars;
    }

    public String onRowSelect(){
        System.out.println("Row Click!!!");
        return "otherpage";//Does this nav works???if not how???
    }

    public Car getCar() {
        return car;
    }

    @Override
    public Car getRowData(String pArg0) {
        // TODO Auto-generated method stub
        return null;
    }

    @Override
    public Object getRowKey(Car pArg0) {
        // TODO Auto-generated method stub
        return null;
    }   
    }

OtherBean:

public class Car{

    private String model;   
    private String randomColor; 

    public String getRandomColor() {
        return randomColor;
    }
    public void setRandomColor(String pRandomColor) {
        randomColor = pRandomColor;
    }

    public String getModel() {
        return model;
    }
    public void setModel(String pModel) {
        model = pModel;
    }

}
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4 answers

#{tableBean.cars}should implement SelectableDataModelif you do not specify an attribute rowKeyin <p:dataTable>.

#{tableBean}. . PrimeFaces. , TableBean , :

@ManagedBean
@ViewScoped
public class TableBean implements Serializable {

    private List<Car> cars;
    private Car car;
    private CarDataModel carsModel;

    public TableBean() {
        cars = new ArrayList<Car>();
        // Populate cars here and thus NOT in the getter method!
        carsModel = new CarDataModel(cars);
    }

    // ...
}

CarDataModel ( , PrimeFaces):

public class CarDataModel extends ListDataModel<Car> implements SelectableDataModel<Car> {  

    public CarDataModel() {
    }

    public CarDataModel(List<Car> data) {
        super(data);
    }

    @Override
    public Car getRowData(String rowKey) {
        List<Car> cars = (List<Car>) getWrappedData();

        for(Car car : cars) {
            if(car.getModel().equals(rowKey))
                return car;
        }

        return null;
    }

    @Override
    public Object getRowKey(Car car) {
        return car.getModel();
    }

}

, #{tableBean.carsModel} #{tableBean.cars} <p:dataTable>. , .

<p:dataTable value="#{tableBean.carsModel}" var="car" ... />

, rowKey <p:dataTable>.

<p:dataTable value="#{tableBean.cars}" var="car" rowKey="#{car.model}" ... />

SelectableDataModel. , null . . DataModel org.primefaces.model.SelectableDataModel, , rowKey.

+24

, rowKey bean, "value =.." datatable. Mine , rowKey .

+1

, rowkey, : rowKey = "# {course.getCompositeKey()

KeyKey, ( ). 2 - , this.compositeKey = this.courseNumber + this.product - 2 Car courseNumber .

0

You should not implement datamodal in your managed folder, just specify in the proprety of the datatable "rowkey", like this: rowkey = "{mbean.atribute1}"
- attribute1 should be filled in the column of the data table.

Should

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