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我有3个嵌套模型:ApplicationUser(来自实体框架),City和State。 应用程序用户具有城市作为外键,城市具有作为外键的状态。 当我查询一个用户时,我得到一个包含City在内的所有属性的用户作为相关模型,但是当我查找城市时,相关模型State为null,所有其他属性都可以。任何线索?嵌套实体模型查询问题
这是StateModels
public class StateModels
{
public int Id { get; set; }
public string State { get; set; }
public string Abbreviation { get; set; }
}
这是CityModels
public class CityModels
{
public int Id { get; set; }
public string City { get; set; }
public int ZipCode { get; set; }
public virtual StateModels State { get; set; }
}
这是ApplicationUser
public class ApplicationUser : IdentityUser
{
public string FirstName { get; set; }
public string LastName { get; set; }
public string CompanyName { get; set; }
public string Address1 { get; set; }
public string Address2 { get; set; }
public virtual CityModels City { get; set; }
public string CompanyPhone { get; set; }
public string CompanyFax { get; set; }
public bool Validated { get; set; }
public bool Staff { get; set; }
public async Task<ClaimsIdentity> GenerateUserIdentityAsync(UserManager<ApplicationUser> manager)
{
// Note the authenticationType must match the one defined in CookieAuthenticationOptions.AuthenticationType
var userIdentity = await manager.CreateIdentityAsync(this, DefaultAuthenticationTypes.ApplicationCookie);
// Add custom user claims here
return userIdentity;
}
}
这是我试图去的状态对象
ApplicationUser applicationUser = db.Users.Find(idUser);
var city = applicationUser.City; //object city is ok
var state = city.State; // this field is null, all others attributes are ok
在db中,所有的城市寄存器都有状态ID参考