creating in query in nhibernate using linq - nhibernate

Question

i want to create something like
SELECT * FROM dbo.localconveyance_details WHERE
voucherNo IN (SELECT voucherNo FROM dbo.localconveyance_master WHERE emp_code = '48'
using linq in fluent nhibernate
tried something like this
IList<LocalConveyanceDetails> detailslist = session.Query<LocalConveyanceDetails>()
.Where(x => x.LocalConveyanceMaster.emp_code == e_id).ToList();
but its not working ... can someone tell what would be the actual query ?
Update :
the Entities which i have used are :
public class LocalConveyanceMaster
{
public virtual String voucherNo { get; set; }
public virtual DateTime voucher_date { get; set; }
public virtual String emp_code { get; set; }
public virtual String emp_name { get; set; }
public virtual String project_id { get; set; }
public virtual DateTime submitDate { get; set; }
public virtual String to_be_approved_by { get; set; }
public virtual String created_by { get; set; }
public virtual Decimal conveyance_total { get; set; }
public virtual Decimal approved_amount { get; set; }
public virtual String approved { get; set; }
public virtual ProjectMaster Project { get; set; }
public virtual ICollection<LocalConveyanceDetails> LocalConveyanceDetails { get; set; }
}
public class LocalConveyanceDetails
{
public virtual String LcDetailsId { get; set; }
public virtual String voucherNo { get; set; }
public virtual String serialNo { get; set; }
public virtual String From_Project_Id { get; set; }
public virtual String To_Project_Id { get; set; }
public virtual DateTime particularsDate { get; set; }
public virtual Decimal particularsAmount { get; set; }
public virtual String particulars { get; set; }
public virtual LocalConveyanceMaster LocalConveyanceMaster { get; set; }
}
and the mappings are :
public LocalConveyanceMap()
{
Table("localconveyance_master");
Id(x => x.voucherNo).Column("voucherNo");
Map(x => x.voucher_date);
Map(x => x.emp_code);
Map(x => x.emp_name);
Map(x => x.project_id);
Map(x => x.submitDate);
Map(x => x.to_be_approved_by);
Map(x => x.created_by);
Map(x => x.conveyance_total);
Map(x => x.approved_amount);
Map(x => x.approved);
References(x => x.Project)
.Column("project_id")
.ForeignKey("project_id");
HasMany(x => x.LocalConveyanceDetails)
.KeyColumn("voucherno").AsSet();
}
public LocalConveyanceDetailsMap()
{
Table("Localconveyance_details");
Id(x => x.LcDetailsId).Column("LcDetailsId");
Map(x => x.voucherNo);
Map(x => x.serialNo);
Map(x => x.From_Project_Id);
Map(x => x.To_Project_Id);
Map(x => x.particularsDate);
Map(x => x.particularsAmount);
Map(x => x.particulars);
References(x => x.LocalConveyanceMaster)
.PropertyRef(x => x.voucherNo).Column("voucherno")
.ForeignKey("voucherno");
}
the error which i am getting is :
Exception : {"Error performing LoadByUniqueKey[SQL: SQL not available]"}
InnerException : {"The given key was not present in the dictionary."}

Answer 1

that's occurred when the one or more member of class is kind of other class [relationship].
i have a same problem and i remove that members and add new member for each of them in this form :
public virtual int? [related class]id {get;set;}
exmaple :
public virtual int? PersonId {get;set;}