EF7 beta5:外键返回空值

Question

我使用ASP.NET5和Entity Framework 7.0.0-beta 5创建了一个API.

我创建了Model,DbContext和Repository,当我尝试从数据库中检索数据时,除了外键数据外,我得到了所有数据.

外键值始终为null.

的DbContext

public class MrBellhopContext : DbContext
{

    public DbSet<Company> Company { get; set; }
    public DbSet<CompanyStatus> CompanyStatus { get; set; }

    protected override void OnModelCreating(ModelBuilder modelBuilder)
    {
        modelBuilder.Entity<Company>().Table("Company");
        modelBuilder.Entity<Company>().Key(c => c.CompanyId);
        modelBuilder.Entity<Company>().Index(c => c.Name);
        modelBuilder.Entity<Company>().Reference(c => c.Status).InverseReference().ForeignKey<CompanyStatus>(c => c.StatusId);

        modelBuilder.Entity<CompanyStatus>().Table("CompanyStatus");
        modelBuilder.Entity<CompanyStatus>().Key(c => c.StatusId);

        base.OnModelCreating(modelBuilder);
    }

}

模型

public class Company
{

    public int CompanyId { get; set; }

    public string Name { get; set; }

    public string Email { get; set; }

    public CompanyStatus Status { get; set; }

    public DateTime CreatedAt { get; set; }

    public DateTime UpdatedAt { get; set; }

}

存储库(只获取所有方法)

    public IEnumerable<Company> GetAll()
    {
        return _dbcontext.Company.ToList();
    }

使用HTTP GET检索数据我获取所有数据,但外键的值为null:

JSON响应:

0:  {
CompanyId: 1
Name: "Hotel Amura"
Email: "info@hotelamura.com"
Status: null
CreatedAt: "2015-01-01T00:00:00"
UpdatedAt: "2015-01-01T00:00:00"
}

有谁知道如何使用EF7查询获取外键表数据？

Answer 1

EF7中尚未实现延迟加载.使用以下查询来急切加载相关实体.

_dbcontext.Company.Include(c => c.Status).ToList();