从 ICollection Entity Framework 核心加载 ICollection

Question

我有这些模型，它们都是连续的一对多关系。

ListaAbastecimento > ReferenciaAbastecimento > EtiquetaAbastecimento

[Table(name: "hListasAbastecimento")]
public class ListaAbastecimento
{
    public int Id { get; set; }
    public int ColaboradorId { get; set; }   
    [ForeignKey("ColaboradorId")]
    public virtual Colaborador Colaborador { get; set; }

    public string UAP { get; set; }
    public DateTime DataCriacao { get; set; }

    public virtual ICollection<ReferenciaAbastecimento> Referencias { get; set; }
}




    [Table(name: "hReferenciasAbastecimento")]
    public class ReferenciaAbastecimento
    {
        public int Id { get; set; }

        [MaxLength(15)]
        public string Referencia { get; set; }
        public int? QtdAbastecimento { get; set; }
        public int? QtdCaixas { get; set; }
        public int? QtdPecasPorCaixa { get; set; }

        public virtual ICollection<EtiquetaAbastecimento> Etiquetas { get; set; }
    }




[Table(name: "hEtiquetasAbastecimento")]
    public class EtiquetaAbastecimento
    {
        public int Id { get; set; }
        public int? EtiquetaFIFO { get; set; }
        public int? Qtd { get; set; }

        [MaxLength(20)]
        public string Localizacao { get; set; }

        public int ReferenciaAbstecimentoId { get; set; }
        [ForeignKey("ReferenciaAbstecimentoId")]
        public virtual ReferenciaAbastecimento ReferenciaAbastecimento { get; set; }
    }

这是我尝试过的方法，但是 theninclude 找不到属性

   var abastecimentosList = await _context.ListasAbastecimento
            .Include(la => la.Referencias)
            .ThenInclude(r => r.Etiquetas) // can't find Etiquetas property
            .ToListAsync();

这行不通

Answer 1

在 Many-to-Many 关系上使用 ThenInclude 由 Entity Framework 核心本身支持，编译器应该能够处理提供的代码。但是，在 Intellisense 和 Visual Studio(s) 中有 is/was a bug，它们没有正确显示您可以使用的属性。（在你的情况下 Etiquetas）。可以确认，在VS 2019 (16.2.0 Preview 1.0) 版本中修复。

从 ICollection Entity Framework 核心加载 ICollection

Load ICollection from ICollection Entity Framework Core

c#

asp.net-core-2.2

entity-framework-core-2.2