Insert in table - strange value

Question

I am trying to insert a value into a table from a select option.

html:

<select class="form-control" name="chaveCadastro" ng-options="cadastro.cadastroId for cadastro in (cadastro | orderBy:'id' | filter:{active:true}) track by cadastro.id" ng-model="cad.cadGeral.chaveCadastro"  id="cadastro">
</select>

angular:

cadGeral = result.data.value;

console.log(cad.cadGeral.chaveCadastro.id);

java:

public class cadGeral extends IdentityObject { 

    private static final long serialVersionUID = 1L; 
    @Column(name = "fk_cadastro") 
    public Cadastro chaveCadastro;

In console.log comes correct.

In Insert, the field is going with a value nothing to see type always the same: 1864385090. I suspect you are trying to insert the whole object and not the value I want, the id.

In html I cannot do by example ng-model="cad.cadGeral.chaveCadastro.id" error does not recognize id.

How do I from this keyCheck object only get the id in html and not the whole object?