Null value returned from jsp form:options to controller - spring

Question

The value returned by the JSP page for the path constituency is NULL. I have opted for a drop down list to display all the possible constituencies that can be selected. I have elaborated on the problem below.
Here is the Person Class:
#Entity
#Table(name="person")
public class person{
#Id
#Column(name = "NIC")
private Integer NIC;
#Column(name= "firstname")
private String fname;
#Column(name= "lastname")
private String lname;
#ManyToOne
#JoinColumn(name= "constituency_id")
private constituency constituency;
#OneToOne
#JoinColumn(name="NIC")
private login log;
public person(){
this.NIC = 1234;
this.fname = "Undefined";
this.lname = "Undefined";
}
public person(String fname, String lname, Integer NIC) {
this.fname = fname;
this.lname = lname;
this.NIC = NIC;
}
public Integer getNIC() {
return this.NIC;
}
public void setNIC(Integer NIC) {
this.NIC = NIC;
}
public String getfname() {
System.out.println(this.fname);
return this.fname;
}
public void setfname(String name) {
this.fname = name;
}
public String getlname() {
return this.lname;
}
public void setlname(String lname) {
this.lname = lname;
}
public constituency getConstituency() {
return this.constituency;
}
public void setConstituency(constituency id) {
this.constituency = id;
}
public login getlogin() {
return this.log;
}
public void setlogin(login log) {
this.log = log;
}
#Override
public String toString() {
return this.lname + " : " + this.fname;
}
}
Here is the Constituency Class:
#Entity
#Table(name="constituency")
public class constituency {
#Column(name="address")
private String address;
#Column(name="name")
private String name;
#Id
#Column(name="constituency_id")
private Integer constituency_id;
#Column(name="noofvoters")
private Integer voters;
#OneToMany(mappedBy="constituency", cascade = {CascadeType.ALL})
private Set <person> persons;
public constituency(){
this.constituency_id = 0;
this.name = "Undefined";
this.address = "Undefined";
this.voters = 0;
}
public constituency(String name, String address, Integer voters, Integer id) {
this.name = name;
this.address = address;
this.voters = voters;
this.constituency_id = id;
}
public String getname() {
System.out.println(this.name);
return this.name;
}
public void setname(String name) {
this.name = name;
}
public String getaddress() {
System.out.println(this.address);
return this.address;
}
public void setaddress(String name) {
this.address = name;
}
public Integer getvoters() {
return this.voters;
}
public void setvoters(Integer voters) {
this.voters = voters;
}
public Integer getconstituency_id() {
return this.constituency_id;
}
public void setconstituency_id(Integer id) {
this.constituency_id = id;
}
#Override
public String toString() {
return this.name;
}
}
Here is the portion of the controller responsible for handling the operation:
#RequestMapping(value="/Add", method=RequestMethod.GET)
public String add(Model model){
List <constituency> constit = constituencyDAO.details();
model.addAttribute("message", "Add a person for voting");
model.addAttribute("per", new person());
model.addAttribute("constituency", constit);
return "Add";
}
#RequestMapping(value="/Add", method=RequestMethod.POST)
public ModelAndView addperson(#ModelAttribute("per") person per, BindingResult bind){
System.out.println("In controller");
System.out.println(per.getfname()+" First-name");
System.out.println(per.getConstituency()+" constituency");
return hello();
}
Finally, this is the portion of the JSP page with the form:select tag:
<div class = "form-group">
<label for = "element1" class="control-label col-xs-2">Constituency ID</label>
<div class="col-xs-10">
<form:select path="constituency" name="constituency">
<form:option value="NONE" label="--- Select ---" />
<form:options items="${constituency}" itemValue="constituency_id" itemLabel="name" />
</form:select>
<p>Constituency ID</p>
</div>
</div>
Now, the problem is that even though the JSP page is able to successfully display the constituency attribute in the form:options, when the "per" model attribute is retrieved in the controller, the value for constituency and only constituency is NULL.
Below is the output in Eclipse.
The Form:
The output in the RequestMethod.POST: