Question

我有一个EF7 Code第一个模型设置如下：

    public class Employee
    {
        public Guid Id { get; set; }
        public string FullName { get; set; }
        public Guid DepartmentId { get; set; }
        public Department Department { get; set; }
    }

    public class Department
    {
        public Guid Id { get; set; }
        public string Department{ get; set; }
        public List<Employee> Employees { get; set; }
    }

尝试通过API调用检索所有Employees时：

    [HttpGet("")]
    public JsonResult GetAll()
    {
        try
        {
            var employees= _repository.GetAllEmployees();
            var results = Mapper.Map<IEnumerable<EmployeeViewModel>(employees);
            Response.StatusCode = (int)HttpStatusCode.OK;

            return Json(results);
        }
        catch (Exception ex)
        {
            Response.StatusCode = (int)HttpStatusCode.BadRequest;
            return Json(new { Message = ex.Message });
        }
    }

我收到部门的空白。

存储库方法如下所示：

public IEnumerable<Post> GetAllEmployees()
    {
        try
        {
            return _context.Employees
                .Include(e => e.Department)
                .ToList();
        }
        catch (Exception ex)
        {
            return null;
        }
    }

我做错了什么？我知道这一定很简单。

谢谢你的帮助。

更新：我正在正确播种初始数据。

SQL Generated如下：

  'SELECT [e].[Id], [e].[DepartmentId], [e].[FullName], [d].[Id], [d].[Department] FROM [Employee] AS [e] INNER JOIN [Department] AS [d] ON [e].[DepartmentId] = [d].[Id]'

但我现在看到以下错误：

 Newtonsoft.Json.JsonSerializationException: Self referencing loop detected for property 'Department' with type 'Project.Models.Department'. Path '[0].Department.Employees[0]

在WebAPI MVC6中使用一对多关系填充对象

0 个答案: