我有以下数据传输对象:
public class SingleForm
{
// other props left out for brevity
public List<Filter> Filters { get; set; }
}
我随后尝试使用AutoMapper进行映射,如下所示:
CreateMap<Form, SingleForm>()
.ForMember(dest => dest.Filters,
opts => opts.MapFrom(src =>
Mapper.Map<List<Filter>>(src.Questions)));
CreateMap<FormQuestion, Filter>()
.ForMember(dest => dest.Header,
opts => opts.MapFrom(src => src.Question.QuestionText));
我随后使用 ProjectTo:
var query = this.context.Forms
.Where(e => e.Id == message.FormId)
.ProjectTo<SingleForm>()
.FirstOrDefault();
然而,当我执行查询时,我的过滤器集合是空的。
当我尝试使用LINQ手动映射集合时,如下所示,它可以正常工作,所以我想知道是否有做错什么?
var query = this.context.Forms
.Where(e => e.Id == message.FormId)
.Select(e => new SingleForm
{
Id = e.Id,
Filters = e.Questions.Select(q =>
new Filter {
Header = q.Question.QuestionText
}).ToList()
})
.FirstOrDefault();