Struts2 checkboxlist prepopulate problem

[J Snider]

Hi,
I am unable to figure out how to prepopulate a checkboxlist. The checkboxlist displays fine and works when I insert a record (i see the data in the db), but when I edit that record the checkboxlist is always blank/not populated. Using struts2/hibernate.

Student entity (many-to-many relationship with AwardCriteria)

 
public class Student {
               ..... 

               private List<AwardCriteria> criteria;

               .....

}

AwardCriteria entity (many-to-many relationship with Student)

public class AwardCriteria {
	private Long id;
	private String name;
	private String description;
                .....
}

StudentAction - I get all possible criteria items and place them in awardCriteria

   
public class StudentAction extends ActionSupport implements Preparable, ModelDriven {
	
	private int studentId;
	private Student student;
	private List<Student> students;
	private List<Major> majors;
	private List<SchoolDistrict> districts;
	private List<AwardCriteria> awardCriteria;
	
	public void prepare() throws Exception
	{
		majors = MajorManager.list();
		districts = SchoolDistrictManager.list();
		awardCriteria = AwardCriteriaManager.list();
		
		if(studentId == 0)
		{
			this.student = new Student();
		}
		else
		{
			this.student = StudentManager.find(studentId);
			
		}
	}
	
	public Object getModel() 
	{
        return student;
    }
	
	public String execute() throws Exception {
        return SUCCESS;
    }
	
	public String list()
	{
		students = StudentManager.list();
		return SUCCESS;
	}
	
	public String createOrUpdate()
	{
		StudentManager.save(student);
		students = StudentManager.list();
		return SUCCESS;
	}
	
	public String edit()
	{
		return SUCCESS;
	}
	
	public String delete()
	{
		StudentManager.delete(student);
		return SUCCESS;
	}
	
	public Student getStudent() {
		return student;
	}

	public void setStudent(Student student) {
		this.student = student;
	}

	public List<Student> getStudents() {
		return students;
	}

	public void setStudents(List<Student> students) {
		this.students = students;
	}

	public int getStudentId() {
		return studentId;
	}

	public void setStudentId(int studentId) {
		this.studentId = studentId;
	}

	public List<Major> getMajors() {
		return majors;
	}

	public void setMajors(List<Major> majors) {
		this.majors = majors;
	}

	public List<SchoolDistrict> getDistricts() {
		return districts;
	}

	public void setDistricts(List<SchoolDistrict> districts) {
		this.districts = districts;
	}

	public List<AwardCriteria> getAwardCriteria() {
		return awardCriteria;
	}

	public void setAwardCriteria(List<AwardCriteria> awardCriteria) {
		this.awardCriteria = awardCriteria;
	}

}

JSP checkboxlist - the list is set to awardCriteria (contains all possible criteria options). This allows me to save to the db fine (data in db is correct), but the checkboxlist never prepopulates when I edit a record

<s:checkboxlist list="awardCriteria" label="Criteria Items" listKey="id" listValue="name" name="criteria.id" value="criteria.id" />

How can I get my checkboxlist to prepopulate? Any guidance greatly appreciated. Thanks.

[Nishan Patel]

hi,

please change in you code at jsp for display chaeck box list.

<s:checkboxlist list="awardCriteria" label="Criteria Items" listKey="id" listValue="name" name="criteria.id" value="%{id}" />


Just change this value="%{id}"

this will solve your problem.