英文:
Go - Parse NULL to time.Time in Struct
问题
我正在翻译以下内容：
我正在将一个具有time.Time类型的结构体进行转换。
t2 := time.Now()format := "2006-01-02 15:04:05"theTime, _ := time.Parse(format, t2.Format(format))
然而，有时我不想设置time.Time字段，你如何在go/mysql数据库驱动中定义这个？
app_history := &models.AppsHistoryInsert{AppId: response.SetAppData[0].Id,LiveDate: &theTime,}
基本上，我想要：
if(x == true) {包含时间}else {不包含时间}
我尝试在结构体声明周围使用if，并将LiveDate字段省略，但是我得到了controllers/apps.go:1068: undefined: app_history的错误。
英文:
I am casting to a struct which has a time.Time type in.
t2 := time.Now()format := "2006-01-02 15:04:05"theTime, _ := time.Parse(format, t2.Format(format))
However, sometimes I don't want to set the time.Time field, how do you define this with the go/mysql db driver?
app_history := &models.AppsHistoryInsert{AppId: response.SetAppData[0].Id,LiveDate: &theTime,}
Basically, I want
if(x == true) {include time}else {don't include time.}
I tried doing an if around the struct declaration itself and leaving the LiveDate field out but I got the error of controllers/apps.go:1068: undefined: app_history
答案1
得分: 3
你需要在if语句之外定义app_history变量，并在每个分支中对其进行赋值。
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,}}
英文:
you need to define the app_history variable outside the if statement and then assign to it in each of the branches
like so
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,}}
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