Composite identifiers, need help.

pedroveber · **Joined:** Wed Apr 16, 2008 1:20 pm **Posts:** 16

I have a class with composite identifier and im having some difficulties, if anyone could help me i'd appreciate.
Class Empresa:

Code:

 public class Empresa
    {
        public Empresa()
        { }

        private EmpresaPK _empresaPK;
        private string _razaoSocial;
        private string _cgc;

        public virtual EmpresaPK EmpresaPK
        {
            get { return _empresaPK; }
            set { _empresaPK = value; }
        }

        public virtual string RazaoSocial
        {
            get { return _razaoSocial; }
            set { _razaoSocial = value; }
        }

        public virtual string CGC
        {
            get { return _cgc; }
            set { _cgc = value; }
        }
   }

Composite Id

Code:

    [Serializable]
    public class EmpresaPK
    {
        public EmpresaPK()
        { }

        private int _codigo;
        private int _codigoFilial;

        public int Codigo
        {
            get { return _codigo; }
            set { _codigo = value; }
        }

        public int CodigoFilial
        {
            get { return _codigoFilial; }
            set { _codigoFilial = value; }
        }

        public override bool Equals(object obj)
        {

            if (obj == this) return true;
            if (obj == null) return false;

            EmpresaPK that = (EmpresaPK)obj;
            if (that == null)
            {
                return false;
            }
            else
            {
                if (this._codigo != that._codigo) return false;
                if (this._codigoFilial!= that._codigoFilial) return false;
                return true;
            }

        }

        public override int GetHashCode()
        {
            return Codigo.GetHashCode() ^ CodigoFilial.GetHashCode();
        }
    }

HBM.XML:

Code:

hibernate-mapping xmlns="urn:nhibernate-mapping-2.2">
   <class name="Entidades.Empresa, Entidades" table="tblEmpresa" lazy="true">

      <composite-id name="EmpresaPK" class="Entidades.EmpresaPK,Entidades">
         <key-property name="Codigo" column="empCodigo" type="Int32" />
         <key-property name="CodigoFilial" column="empCodigoFilial" type="Int32" />
      </composite-id>
      
      <property name="RazaoSocial" column="empRazaoSocial" type="String" length="60" />
      <property name="CGC" column="empCgc" type="String" length="18" />
   </class>
</hibernate-mapping>

I'm getting the following errors when i try to .Save the object:
"ids for this class must be manually assigned before calling save(): Entidades.Empresa"

Im doing this:

Code:

EmpresaPK empresaPK = new EmpresaPK();
empresaPK.Codigo = 1;
empresaPK.CodigoFilial = 1;

empresa.EmpresaPK = empresaPK;
empresa.RazaoSocial ="test";
empresa.CGC = "test";

Anyone knows why im getting this error?

Other question:
-I wanted to generate one of the fields myself but let the system generate the other field in the key. It's that possible?