Go - 将 NULL 解析为 time.Time in Struct

Question

我正在转换为一个包含 time.Time 类型的结构。

t2 := time.Now()
format := "2006-01-02 15:04:05"

theTime, _ := time.Parse(format, t2.Format(format))

但是有时候不想设置time.Time字段，go/mysql db driver怎么定义呢？

app_history := &models.AppsHistoryInsert{
    AppId:          response.SetAppData[0].Id,
    LiveDate:       &theTime,
}

基本上，我想要

if(x == true) { 
    include time 
}
else {
    don't include time. 
}

我尝试围绕结构声明本身执行 if 并将 LiveDate 字段留在外面，但我得到了 controllers/apps.go:1068 的错误:未定义:app_history

Answer 1

你需要在if语句外定义app_history变量，然后在每个分支中赋值给它

像这样

var app_history &models.AppsHistoryInsert{}

if x {
  app_history = &models.AppsHistoryInsert{
    AppId:          response.SetAppData[0].Id,
    LiveDate:       &theTime,
  }
}else {
  app_history = &models.AppsHistoryInsert{
    AppId:          response.SetAppData[0].Id,
  }
}