“ MERGE”實體框架核心附近的語法不正確

Question

嘗試創建一個有幾個地址的客戶端時遇到問題。

public class Client
{
    public int Id { get; set; }
    public string Name{ get; set; }
    public string Lastname{ get; set; }
    public int DNI { get; set; }
    public List<Phones> Phones{ get; set; }
}

public class Phone
{
    [Key]
    public int IdPhone { get; set; }
    public int Number{ get; set; }
}

public Client Create(Client client)
{
    if (_context.Client.Any(x => x.DNI == cliente.DNI))
        throw new AppException("Username " + cliente.DNI + " is already taken");

    _context.Cliente.Add(client);
    _context.Phones.AddRange(client.Phones);
    _context.SaveChanges();

    return client;
}

例外是：

Microsoft.EntityFrameworkCore.DbUpdateException：'更新條目時發生錯誤。 有關詳細信息，請參見內部異常。

SqlException：“ MERGE”附近的語法不正確

{
"name": "Franco",
"lastname": "Pachue",
"dni": 55555555,
"phones": [
    {
        "number": "4444444"
    }
]

}

Answer 1

不要執行AddRange。 只需將ClientId添加到Phone實體（假設一個電話僅屬於一個客戶端）。 添加客戶端后，電話將被保存。

public class Client
{
public int Id { get; set; }
public string Name{ get; set; }
public string Lastname{ get; set; }
public int DNI { get; set; }
public List<Phones> Phones{ get; set; }
}

public class Phone
{
[Key]
public int IdPhone { get; set; }
public int Number{ get; set; }
public int ClientId { get; set; }
public Client Client { get; set; }
}

public Client Create(Client client)
{
if (_context.Client.Any(x => x.DNI == cliente.DNI))
    throw new AppException("Username " + cliente.DNI + " is already taken");

_context.Client.Add(client);
_context.SaveChanges();

return client;
}