在 asp.net core api 中返回集合

Question

我有一个带有 ef-core 的模型的小 api

public class AppUser : IdentityUser
{
    public string FirstName { get; set; }
    public string LastName { get; set; }
    public string Company { get; set; }
    public ICollection<Account> Accounts { get; set; }
}

public class Account
{
    public int id { get; set; }
    public AppUser User { get; set; }
    public string AccountNumber { get; set; }
}

我有一个控制器获取函数：

[HttpGet]
public async Task<IActionResult> Home()
{
    // retrieve the user info
    //HttpContext.User
    var userId = _caller.Claims.Single(c => c.Type == "id");
    var user = await _appDbContext.Users.SingleAsync(c => c.Id == userId.Value);            

    return new OkObjectResult(new
    {
        Message = "This is secure API and user data!",
        user.FirstName,
        user.LastName,
        user.Accounts
    });
}

如何让控制器返回帐户列表？在调试中，我可以看到具有正确数据的“帐户”变量，我只是不确定如何格式化该变量并将其返回 api

我目前正在接收：

{
"message": "This is secure API and user data!",
"firstName": "Bill",
"lastName": "Johnson",
"serviceAccounts": null
}

更新：所以我使用 dotnet 命令行运行了应用程序并得到了

{"firstName":"Bill","lastName":"Johnson","serviceAccounts":[{"id":1,"camsUser":{"firstName":"Bill","lastName":"Johnson","company":null

Answer 1

如果子实体设置为延迟加载，那么您应该获取帐户和用户为

var user = await _appDbContext.Users.Include(u => u.Accounts).SingleAsync(c => c.Id == userId.Value); 

Answer 2

我是这样想的：

var userId = _caller.Claims.Single(c => c.Type == "id");
var user = await _appDbContext.Users.Include(s =>s.Accounts).SingleAsync(c => c.Id == userId.Value);
var accounts = user.Accounts.Select(a => new
        {
            a.AccountNumber,
            a.id
        });
return new OkObjectResult(new
        {
            user.FirstName,
            user.LastName,
            accounts
        });