將 Dto 與 model 綁定，然后返回一個 Dto

Question

首先看看我的代碼：這是ConceptDto ：

public Guid ConceptId { get; set; }
public string ConceptName { get; set; }
public string ConceptLatinName { get; set; }
public List<ConceptSubDto> ConceptSubSidiary { get; set;}

這是ConceptSubDto ：

   public Guid ConceptSubId { get; set; }
   public string  ConceptSubName { get; set; }

我有這樣的域名。

現在這是我的應用層，它有邏輯我想通過 id 獲取這些並只返回一個ConceptDto但我不知道必須 map 這些 dto 與域模型：

 public async Task<ConceptManagementDto> GetConceptById(Guid id)
 {
     var concept = await _conceptManagementRepository.Query()
                              .Include(x => x.conceptSubSidiaries)
                              .GetOneAsync(x => x.Id == id);
     return new ConceptManagementDto
            {
                ConceptManagementId = concept.Id,
                ConceptName = concept.ConceptName,
                ConceptLatinName = concept.ConceptLatinName,
                ConceptSubSidiary = ??
            };
}

Answer 1

如果您的 DTO 的字段較少，則此查詢應該有效：

public async Task<ConceptManagementDto> GetConceptById(Guid id)
{
     return await _conceptManagementRepository.Query()
        .Where(x => x.Id == id)
        .Select(x = new ConceptManagementDto
        {
            ConceptManagementId = x.Id,
            ConceptName = x.ConceptName,
            ConceptLatinName = x.ConceptLatinName,
            ConceptSubSidiary = x.ConceptSubSidiaries
                .Select(sub => new ConceptSubDto
                {
                    ConceptSubId = sub.ConceptSubId,
                    ConceptSubName = sub.ConceptSubName
                })
                .ToList()
        }).First();
}