我已经使用VSCode按照this教程,使用
我的MySQL数据库有很多模型,因为我正在将
当我尝试进行简单的
请注意,字段
为什么会出现这种情况呢?
非常感谢,对我的糟糕英语表示抱歉。
.Net core
和EFCore
创建了一个API。我的MySQL数据库有很多模型,因为我正在将
asp.net WebAPI
的EF6
迁移到.Net core
,所以我只是复制并粘贴以避免重复劳动。当我尝试进行简单的
Get
时,EFCore会连接两个不同表的两列:
User控制器
[Route("v1/[controller]")]
public class UserController : Controller
{
private readonly IntentContext _context;
public UserController(IntentContext context)
{
_context = context;
}
[HttpGet]
public IEnumerable<user> GetAll()
{
return _context.user.ToList();
}
}
“用户”模型
public class user
{
public user()
{
user_image = new HashSet<user_image>();
user_credit_card = new HashSet<user_credit_card>();
user_pocket_history = new HashSet<user_pocket_history>();
user_pocket = new HashSet<user_pocket>();
//A lot of table instances
}
public string id { get; set; }
public string username { get; set; }
public string password { get; set; }
public string id_account_type { get; set; }
public int user_status { get; set; }
public DateTime create_time { get; set; }
public DateTime update_time { get; set; }
public virtual account_type account_type { get; set; }
public virtual ICollection<user_image> user_image { get; set; }
public virtual ICollection<user_credit_card> user_credit_card { get; set; }
public virtual ICollection<user_pocket_history> user_pocket_history { get; set; }
public virtual ICollection<user_pocket> user_pocket { get; set; }
//A lot of table relations
}
表 account_type
public class account_type
{
public account_type()
{
this.user = new HashSet<user>();
this.establishment_employee = new HashSet<establishment_employee>();
}
public string id { get; set; }
public string account_description { get; set; }
public string account_name { get; set; }
public DateTime create_time { get; set; }
public DateTime update_time { get; set; }
public virtual ICollection<user> user { get; set; }
public virtual ICollection<establishment_employee> establishment_employee { get; set; }
}
在 GET 请求期间的终端日志
fail: Microsoft.EntityFrameworkCore.Database.Command[20102]
Failed executing DbCommand (140ms) [Parameters=[], CommandType='Text', CommandTimeout='30']
SELECT `u`.`id`, `u`.`Id_account_type`, `u`.`account_typeid`, `u`.`create_time`, `u`.`password`, `u`.`update_time`, `u`.`user_status`, `u`.`username`
FROM `user` AS `u`
MySql.Data.MySqlClient.MySqlException (0x80004005): Unknown column 'u.account_typeid' in 'field list' ---> MySql.Data.MySqlClient.MySqlException (0x80004005): Unknown column **'u.account_typeid'** in 'field list'
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
//A lot of exceptions generated
fail: Microsoft.EntityFrameworkCore.Query[10100]
An exception occurred in the database while iterating the results of a query for context type 'IntentAPI.Models.IntentContext'.
MySql.Data.MySqlClient.MySqlException (0x80004005): Unknown column 'u.account_typeid' in 'field list' ---> MySql.Data.MySqlClient.MySqlException (0x80004005): Unknown column 'u.account_typeid' in 'field list'
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
请注意,字段
u.account_typeid
实际上不存在。它是用户表的account_type
和account_type
表的id
连接而成。为什么会出现这种情况呢?
非常感谢,对我的糟糕英语表示抱歉。