我试图在我的“实体”实体中获取一个“数据”。我可以从这句话中得到全部:
。ThenInclude(matter => issue.Data)
但是我只想要1 =>,它具有创建的最新日期。如下所示,但它不起作用。
。ThenInclude(matter => issue.Data.OrderByDescending(i => i.CreatedDate).FirstOrDefault())
我的.ThenInclude()异常。它说表达式应该代表一个属性。 .Data不是财产吗?我也尝试了没有.Data的情况,没有运气
我的例外说:
“ ThenInclude属性lambda表达式'matter => {来自MatterData i in物质。数据按[i] .CreatedDate desc选择[i] => FirstOrDefault()}。数据”无效。该表达式应表示属性访问:“ t => t.MyProperty”。要定位在派生类型上声明的导航,请指定目标类型的显式输入的lambda参数,例如。 '(派生d)=> d.MyProperty'。“
这是我试图获取'Data'的单个属性的方式>
public async Task<Claim> GetClaim(int id) { var query = _autoContext.Claims .Include(claim => claim.Matter) .ThenInclude(matter => matter.Data.OrderByDescending(i => i.CreatedDate).FirstOrDefault().Data) .AsQueryable(); var result = await query.FirstOrDefaultAsync(c => c.Id == id); return result; }
这里是理赔,事项和事项数据
public class Matter
{
public Matter()
{
CreatedDate = DateTime.Now;
EditedDate = DateTime.Now;
Data = new List<MatterData>();
Claims = new List<Claim>();
}
public int Id { get; set; }
public string MatterNumber { get; set; }
public string FirstName { get; set; }
public string LastName { get; set;}
public ICollection<MatterData> Data { get; set; }
public ICollection<Claim> Claims { get; set; }
public DateTime CreatedDate { get; set; }
public User CreatedBy { get; set; }
public DateTime EditedDate { get; set; }
public User EditedBy { get; set; }
}
public class MatterData
{
public MatterData()
{
CreatedDate = DateTime.Now;
}
public int Id { get; set; }
public string Data { get; set; }
public Matter Matter { get; set; }
public DateTime CreatedDate { get; set; }
public User CreatedBy { get; set; }
}
public class Claim
{
public Claim()
{
CreatedDate = DateTime.Now;
EditedDate = DateTime.Now;
InjuredParty = new List<Injured>();
}
public int Id { get; set; }
public int? ClaimNumber { get; set; }
public Matter Matter { get; set; }
public TrustGroup TrustGroup { get; set; }
public Attorney Attorney { get; set; }
public User Contact { get; set; }
public Status ClaimStatus { get; set; }
public ClaimType ClaimType { get; set; }
public bool Approved { get; set; }
public DateTime? DateApproved { get; set; }
public DateTime? DateExported { get; set; }
public ICollection<Injured> InjuredParty { get; set; }
public DateTime CreatedDate { get; set; }
public User CreatedBy { get; set; }
public DateTime EditedDate { get; set; }
public User EditedBy { get; set; }
}
我试图在我的“实体”实体中获取一个“数据”。我可以从以下语句中获取全部信息:.ThenInclude(matter => issue.Data),但我只想在其中创建了最新日期的= 1 =>。 ...
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