Question

我正在尝试获取对象的所有属性。我不知道如何使用我正在使用的关系类型来做到这一点。我将返回db中的所有Jobs。 Jobs与CustomerEmployee类有一对多的关系。我需要通过Job列表访问CustomerEmployee类中的所有属性。我成功获得了First＆amp; CustomerEmployee的姓氏，但我看不到如何使用这种方式访问其他属性。所以我不知道我是否需要改变设置关系的方式？这引出了我的下一个问题，当我创建一个新的Job Post时，外键没有插入右栏。 db有两个不同的列。例如，“JobTESPMId”＆amp; “JobTESPMId_EmployeeId”。我需要在“JobTESPMId_EmployeeId”中插入Id，但它正在插入另一个中。设置它时我有点失落，所以我想明白为什么会发生这种情况。

public class Job
{
    public Int64? JobId { get; set; }
    public int? JobNumber { get; set; }
    public string JobName { get; set; }
    public string JobDescription { get; set; }

    public int? GeoAreaId { get; set; }
    public virtual JobMisc.GeoArea GeoArea { get; set; }

    public int? JobClassId { get; set; }
    public virtual JobMisc.JobClass JobClass { get; set; }

    public int? JobTypeId { get; set; }
    public virtual JobMisc.JobType JobType { get; set; }

    public Int64? CustomerId { get; set; }
    public virtual Customer Customer { get; set; }

    public virtual ICollection<ChangeOrder> ChangeOrders { get; set; }
    public virtual ICollection<PurchaseOrder> PurchaseOrders { get; set; }
    public virtual ICollection<JobItem> JobItems { get; set; }

    public int? CustomerEmployeePMId { get; set; }
    public virtual CustomerEmployee CustomerEmployeePM { get; set; }

    public int? CustomerEmployeeAdminId { get; set; }
    public virtual CustomerEmployee CustomerEmployeeAdmin { get; set; }

    public int? CustomerEmployeeAccountantId { get; set; }
    public virtual CustomerEmployee CustomerEmployeeAccountant { get; set; }

    public int? CustomerEmployeeSuperintendentId { get; set; }
    public virtual CustomerEmployee CustomerEmployeeSuperintendent { get; set; }

    public int? JobTESPMId { get; set; }
    public virtual Employee JobTESPM { get; set; }

    public int? JobTESSuperintendentId { get; set; }
    public virtual Employee JobTESSuperintendent { get; set; }
}

CustomerEmployee

public class CustomerEmployee
{
    [Key]
    public int CustomerEmployeeId { get; set; }
    public string CustomerEmployeeFirstName { get; set; }
    public string CustomerEmployeeLastName { get; set; }
    public string CustomerEmployeeEmail { get; set; }
    public Int64? CustomerEmployeePhoneNumber { get; set; }
    public Int64? CustomerEmployeeCellNumber { get; set; }
    public Int64? CustomerEmployeeFaxNumber { get; set; }
    public bool? CustomerEmployeeIsHidden { get; set; }
    public string CustomerEmployeeRole { get; set; }

    public Int64? CustomerId { get; set; }
    public virtual Customer Customer { get; set; }

}

视图模型/结果

 public class JobViewModel
  {
    public Int64? JobId { get; set; }
    public int? JobNumber { get; set; }
    public string JobName { get; set; }
    public decimal? JobOriginalContract { get; set; }
    public DateTime? JobContractDate { get; set; }
    public decimal? JobTotalCO { get; set; }
    public decimal? JobRevisedContract { get; set; }
    public decimal? JobOriginalBudget { get; set; }
    public string JobStatus { get; set; }
    public bool? JobTaxExempt { get; set; }
    public bool? JobCertPayroll { get; set; }
    public decimal? JobCost { get; set; }
    public decimal? JobRemainingBudget { get; set; }
    public decimal? JobProfit { get; set; }
    public decimal? JobPercentage { get; set; }
    public decimal? JobTotalBilled { get; set; }
    public decimal? JobBalanceToBill { get; set; }
    public decimal? JobPaidToDate { get; set; }
    public decimal? JobBalanceDue { get; set; }
    public bool? JobIsHidden { get; set; }


    public string Customer { get; set; }
    public string CustomerEmployeePM { get; set; }
    public string JobTESPM { get; set; }
    public string JobTESSuperintendent { get; set; }
    public IEnumerable<ChangeOrder> ChangeOrders { get; set; }
    public IEnumerable<PurchaseOrder> PurchaseOrders { get; set; }

  }

 public class JobResult
  {
    public Int64? JobId { get; set; }
    public int? JobNumber { get; set; }
    public string JobName { get; set; }
    public decimal? JobOriginalContract { get; set; }
    public DateTime? JobContractDate { get; set; }
    public decimal? JobTotalCO { get; set; }
    public decimal? JobRevisedContract { get; set; }
    public decimal? JobOriginalBudget { get; set; }
    public string JobStatus { get; set; }
    public bool? JobTaxExempt { get; set; }
    public bool? JobCertPayroll { get; set; }
    public decimal? JobCost { get; set; }
    public decimal? JobRemainingBudget { get; set; }
    public decimal? JobProfit { get; set; }
    public decimal? JobPercentage { get; set; }
    public decimal? JobTotalBilled { get; set; }
    public decimal? JobBalanceToBill { get; set; }
    public decimal? JobPaidToDate { get; set; }
    public decimal? JobBalanceDue { get; set; }
    public bool? JobIsHidden { get; set; }


    public string Customer { get; set; }
    public string CustomerEmployeePM { get; set; }
    public string JobTESPM { get; set; }
    public string JobTESSuperintendent { get; set; }
    public IEnumerable<ChangeOrder> ChangeOrders { get; set; }
    public IEnumerable<PurchaseOrder> PurchaseOrders { get; set; }
 }

apiController

// GET api/<controller>
    public IEnumerable<JobResult> Get()
    {
        using (var context = new ApplicationDbContext())
        {
            return context.Jobs
                .Include(x => x.Customer)
                .Include(x => x.ChangeOrders)
                .Include(x => x.PurchaseOrders)
                .Include(x => x.CustomerEmployeePM)
                .Include(x => x.JobTESPM)
                .Include(x => x.JobTESSuperintendent)

                .ToResults();
        }

    }

JSON

0: {$id: "1", JobId: 2, JobNumber: 3244, JobName: "Job Alpha", JobOriginalContract: 34343443,…}
$id: "1"
ChangeOrders: [,…]
Customer: "Twin Peaks"
CustomerEmployeePM: "Kelly Young"
JobId: 2
JobName: "Job Alpha"
JobNumber: 3244
JobTESPM: "Laura Mince"
JobTESSuperintendent: "Scott Willis"
JobTaxExempt: true
JobTotalBilled: null
PurchaseOrders: []
1: {$id: "3", JobId: 9, JobNumber: 342, JobName: "sad", JobOriginalContract: 323232,…}

Answer 1

return context.Jobs
                .Include(x => x.Customer)
                .Include(x => x.ChangeOrders)
                .Include(x => x.PurchaseOrders)
                .Include(x => x.CustomerEmployeePM)
                .Include(x => x.JobTESPM)
                .Include(x => x.JobTESSuperintendent)

                .ToList();

是你需要的

Answer 2

可能是一个快速回答，如果您的JobResult类有一个允许您从Job映射到JobResult的构造函数，那么它就像

一样简单

return context.Jobs
  .Select(j => new JobResult(j));

或者如果你喜欢较少耦合的方式......

return context.Jobs
  .Select(j => new JobResult(j.Customer, j.ChangeOrders, j.PurchaseOrders, etc.));

基本上，您正在处理从一种类型到另一种类型的映射。这种映射工作也是你解决第二个问题的方法。

编辑：我的EF能力有点模糊，但你可能需要一个空的构造函数，在这种情况下是这样的......我有点忘了linq查询中允许的内容但是我知道一个空的构造函数可以工作。

return context.Jobs
  .Select(j => new JobResult() { j.Customer, j.ChangeOrders, j.PurchaseOrders, etc.} );

如果失败了，如果你知道你想要所有工作而没有分页/过滤链......那么......

return context.Jobs
  .ToList()
  .Select(j => new JobResult() { j.Customer, j.ChangeOrders, j.PurchaseOrders, etc.} );

如何通过Result返回对象属性

2 个答案: