submitted form is not completely saved in the database - spring

Question

In my current spring project, one of the renderized forms is the follow:
<form id="Usuario" class="form" role="form" method="post" action="/caixa/Usuario/insert">
<li class="list-group-item">
<field-box>
<label>login</label>
<input type="text" name="login" id="login" class="form-control" />
</field-box>
</li>
<li class="list-group-item">
<field-box>
<label>senha</label>
<input type="password" name="senha" id="senha" class="form-control" />
</field-box>
</li>
<li class="list-group-item">
<field-box>
<label>nome</label>
<input type="text" name="nome" id="nome" class="form-control" />
</field-box>
</li>
<li class="list-group-item">
<field-box>
<label>sobrenome</label>
<input type="text" name="sobrenome" id="sobrenome" class="form-control" />
</field-box>
</li>
<li class="list-group-item">
<field-box>
<label>email</label>
<input type="email" name="email" id="email" class="form-control" />
</field-box>
</li>
<li class="list-group-item">
<field-box>
<label>role</label>
<select multiple="multiple" name="role.id" id="role" class="form-control option" data-classe="Role">
</select>
</field-box>
</li>
<button type="submit" id="cadastrar" class="btn btn-primary">Cadastrar</button>
<div class="alert alert-success alert-dismissible" id="yes" role="alert" style="display: none;">
<button type="button" class="close" data-dismiss="alert"><span aria-hidden="true">×</span><span class="sr-only">Close</span></button>
Cadastro efetuado com sucesso
</div>
<div class="alert alert-danger alert-dismissible" id="not" role="alert" style="display: none;">
<button type="button" class="close" data-dismiss="alert"><span aria-hidden="true">×</span><span class="sr-only">Close</span></button>
<span class="text"></span>
</div>
</form>
the data submitted through this form is related to this class:
#Entity
#Table(name = "usuario")
public class Usuario {
#Id
#Column(name = "id")
#GeneratedValue(strategy=GenerationType.IDENTITY)
private Integer id;
#Column(name = "login")
#Input
private String login;
#Column(name = "senha")
#Input(type = "password")
private String senha;
#Column(name = "nome")
#Input
private String nome;
#Column(name = "sobrenome")
#Input
private String sobrenome;
#Column(name = "email")
#Input(type = "email")
private String email;
#ManyToMany
#JoinTable(name="role_members", joinColumns={#JoinColumn(name="fk_user")}, inverseJoinColumns={#JoinColumn(name="fk_role")})
#LazyCollection(LazyCollectionOption.FALSE)
#Select(classe = Role.class)
private List<Role> role;
}
the submission process is handled by this jquery code:
$(document).on("submit", "form.form", function (event) {
event.preventDefault();
var $form = $( this ), url = $form.attr( "action" );
var posting = $.post( url, $(this).serialize() );
posting.done(function( data ) {
if(data == "") {
$("#yes").show();
} else {
var $temp = $('<div/>', {html:data});
$("#not").find(".text").html( $temp.remove('head').html() );
$("#not").show();
}
$("form.form").each(function(){
this.reset();
});
});
});
and by this methods in my controller, service and dao classes:
#RequestMapping(value = "insert")
#ResponseBody
public void insert(#ModelAttribute("object") E object) throws Exception {
try {
serv.insert(object);
} catch (Exception e) {
throw e;
}
}
public void insert(E object) {
dao.persist(object);
}
#Transactional
public void persist(E object) {
sessionFactory.getCurrentSession().persist(object);
}
but when I run the application and open this view in my browser, and submit this form, the data is saved in the database without the data from the <select> field. I check the browser console (in the firefox), and verify all the fields are being submitted to server, but the field role is the only one which it's not stored.
Anyone can see what's the pronlem here?

Answer 1

I think problem in column names you have given in #JoinTable(name="role_members", joinColumns={#JoinColumn(name="fk_user")}, inverseJoinColumns={#JoinColumn(name="fk_role")})
column name fk_user is not present in your entity class. If you want to use different name then use referencedColumnName attribute and give actual field name.
eg. We are using id from both entities then after change it will be like
#JoinTable(name="role_members", joinColumns={#JoinColumn(name="fk_user", referencedColumnName="id")}, inverseJoinColumns={#JoinColumn(name="fk_role",referencedColumnName="id")})
Hopefully it will work.