在asp.net核心api中返回集合

Question

I have a small api with these models with ef-core

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; }
}

and I have a controller get function:

[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
    });
}

How do I get the controller to return the list of accounts? In debug I can see the "accounts" variable with the correct data, I'm just not sure on how to format that var and return it in the api

I am currently recievng:

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

UPDATE: So I ran the app using the dotnet command line and got

{"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，则您应该以以下方式获取帐户和用户

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

Answer 2

I figured it out with this:

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
        });