使用 automapper 将过滤器应用于集合 [英] Using automapper to apply a filter to a collection

问题描述

我有一个包含集合的域模型，我想使用 AutoMapper 将父级和子级映射到视图模型，但我不希望被软"删除的子级被接受.例如:

I have a domain model that contains a collection and I want to use AutoMapper to map the parent and children to the view model but I don't want children that have been "soft" deleted to be taken across. For instance:

public class Customer {
   public EntitySet<Order> {get;set;}
}
public class Order {
   public DateTime? DeletedDate {get;set;}
}

我的 AutoMapper 定义是

my AutoMapper definition would be

Mapper.CreateMap<Customer, CustomerViewModel>();
Mapper.CreateMap<Order, OrderViewModel>();

并且我不希望 Orders 位于具有 DeletedDate 值的视图模型中.

and I don't want Orders to be in the view model that have a value for DeletedDate.

这在 AutoMapper 中可行吗?非常感谢，

Is that possible in AutoMapper? Many thanks in advance,

史蒂夫.

推荐答案

我遇到了类似的问题，最后类似于下面的方法对我有用:

I came across similar issue and finally the approach similar to the one below worked for me:

Mapper.CreateMap<Customer, CustomerViewModel>()
    .ForMember(dest => dest.Orders, 
        opt => opt.MapFrom(src => src.Orders.Where(o => !o.DeletedDate.HasValue)));

这假设您的 Customer 实体和 CustomerViewModel d 具有名为Orders"的集合.

This assumes your Customer entity and CustomerViewModel dto have collections named "Orders".

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