我正在使用 go lang 创建一个请假申请。我的结构如下

Leave struct {
        Leaveid     int
        Name        string
        EmployeeId  string
        Applieddate time.Time
        Leavestatus string
    }

请假状态在 Processing、Approved、Denied、HRApproved、HrDenied、HrProcessing 之间变化。
一般来说，休假排序顺序必须基于申请日期。
我必须能够首先显示 Processing 和 HRProcessing，然后再显示其他状态类型。

我想要这样的东西

        [
          {
            "Leaveid": 4,
            "Name": "rajesh",
            "EmployeeId": "rajesh",
            "Applieddate": "2016-12-02T08:59:02.870882+08:00",
            "Leavestatus": "HRProcessing"
          },
          {
            "Leaveid": 1,
            "Name": "rajesh",
            "EmployeeId": "rajesh",
            "Applieddate": "2016-12-02T07:30:01.679636+08:00",
            "Leavestatus": "Processing"
          },
{
            "Leaveid": 3,
            "Name": "rajesh",
            "EmployeeId": "rajesh",
            "Applieddate": "2016-12-02T07:00:02.870882+08:00",
            "Leavestatus": "HRProcessing"
          },
         {
            "Leaveid": 5,
            "Name": "rajesh",
            "EmployeeId": "rajesh",
            "Applieddate": "2016-12-02T10:00:11.139189+08:00",
            "Leavestatus": "Approved"
          },
          {
            "Leaveid": 2,
            "Name": "rajesh",
            "EmployeeId": "rajesh",
            "Applieddate": "2016-12-02T07:58:41.837666+08:00",
            "Leavestatus": "HRApproved"
          },

        ]

Update:This is what i have done using sort package

func (sortleave leaveDetails) Len() int {
    return len(sortleave)
}
func (sortleave leaveDetails) Less(i, j int) bool {
    if sortleave[i].Applieddate.After(sortleave[j].Applieddate) {
        return true
    }
    if sortleave[i].Applieddate.Before(sortleave[j].Applieddate) {
        return false
    }
    return sortleave[i].Leavestatus > sortleave[j].Leavestatus
}
func (sortleave leaveDetails) Swap(i, j int) {
    sortleave[i], sortleave[j] = sortleave[j], sortleave[i]
}

输出:

[
  {
    "Leaveid": 2,
    "Name": "rajesh",
    "EmployeeId": "rajesh",
    "Applieddate": "2016-12-02T08:59:45.139189+08:00",
    "Leavestatus": "HRProcessing"
  },
  {
    "Leaveid": 4,
    "Name": "rajesh",
    "EmployeeId": "rajesh",
    "Applieddate": "2016-12-02T08:59:02.870882+08:00",
    "Leavestatus": "HRApproved"
  },
  {
    "Leaveid": 3,
    "Name": "rajesh",
    "EmployeeId": "rajesh",
    "Applieddate": "2016-12-02T08:58:41.837666+08:00",
    "Leavestatus": "Processing"
  },
  {
    "Leaveid": 1,
    "Name": "rajesh",
    "EmployeeId": "rajesh",
    "Applieddate": "2016-12-01T18:10:01.679636+08:00",
    "Leavestatus": "Processing"
  }
]

这里 Processing 下降，HRApproved 上升。但这不是我想要的。请帮助我解决这个问题。谢谢

最佳答案

您需要先按 Leavestatus 排序，然后再按申请日期排序，但 leavestatus 是一组枚举而不是按 alpha 排序，因此您需要对状态进行分类，看看它们是否相同，如果相同，则按日期排序，否则按状态排序。像

func (d leaveDetails) Less(i, j int) bool {
    status := func(l Leave) int {
        if l.Leavestatus == "Processing" || l.Leavestatus == "HRProcessing" {
            return 1
        }
        return 2
    }
    a := status(d[i])
    b := status(d[j])
    if a == b {
        return d[i].Applieddate.After(d[j].Applieddate)
    }
    return a<b
}

关于在 golang 中排序，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/40923603/