Question

我正在使用最新版本的EF Core，它无法正常加载导航属性。假设以下实体类

public partial class Categories
{
    public Categories()
    {
        Inventories = new HashSet<Inventories>();
    }

    public string CategoryId { get; set; }
    public string Title { get; set; }

    public virtual ICollection<Inventories> Inventories { get; set; }
}
public partial class Inventories
{
    public Inventories()
    {
        OrderItems = new HashSet<OrderItems>();
    }

    public string InventoryId { get; set; }
    ..
    public string CategoryId { get; set; }
    public virtual Categories Category { get; set; }
}

以下操作无法将Category实体附加到查询中：

var query = Db.Set<Inventories>();
//query.FirstOrDefault().Category is Null
query.Include(x=> x.Category);
//query.FirstOrDefault().Category is Null
query.Include("Category");
//query.FirstOrDefault().Category is Null

但是，如果我这样做，Lazy和Eager加载工作：

var query = Db.Set<Categories>();
var query2 = Db.Set<Inventories>();
//query2.FirstOrDefault().Category Has Value

EF Core：急切加载和延迟加载都失败了（潜在的错误）

0 个答案: