[英]Using target DTO with nested DTO for Transformers.AliasToBean in NHibernate
我有兩個像這樣的DTO類:
public class Mailing
{
public string MailingType {get;set;}
public DateTime? ValidUntil {get;set;}
public Address MailAddress {get;set;}
}
和
public class Address
{
public string Street {get;set;}
public string StreetNumber {get;set;}
public string ZIP {get;set;}
}
相應的實體具有相同的多對一關系。
現在,我想閱讀一個查詢的Mailing
列表,以防止使用foreach手動構造DTO。 像這樣:
return this.session.QueryOver<MailingEntity>()
.JoinAlias(p => p.Address, () => addressAlias)
.Where(...)
.SelectList(list => list
.Select(p => p.Type).WithAlias(() => mailingDTO.MailingType)
.Select(p => p.ValidTo).WithAlias(() => mailingDTO.ValidUntil)
.Select(() => addressAlias.Street).WithAlias(() => addressDTO.Street)
.Select(() => addressAlias.ZIP).WithAlias(() => addressDTO.ZIP)
.Select(() => addressAlias.StreetNumber).WithAlias(() => addressDTO.StreetNumber)
.Select(() => addressDTO).WithAlias(() => mailingDTO.MailAddress)
.TransformUsing(Transformers.AliasToBean<Mailing>())
.List<Mailing>();
這不起作用。 有什么辦法可以像這樣嵌套DTO,還是我必須分別使用幾個roodtrip來手動創建DTO?
如果可以選擇LINQ
var query = from e in session.Query<MailingEntity>()
let a = e.Address
select new Mailing
{
MailingType = e.Type,
ValidUntil = e.ValidTo,
MailAddress = new Address
{
Street = a.Street,
ZIP = a.ZIP,
StreetNumber = a.StreetNumber
}
};
return query.ToList();
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