main.go中调用 modle中的xorm 为nil

目录结构

proj
│  go.mod
│  main.go
│  go.sum
│  user.db
│
└─models
        dao.go

proj\models\dao.go

package models

import (
    "fmt"
    "github.com/go-xorm/xorm"
    _ "github.com/mattn/go-sqlite3"
    "time"
)

var (
  baseTimestamp time.Time
  x  *xorm.Engine
)

func CallFuncFromMoles() {
    fmt.Println(baseTimestamp)
    fmt.Println(x)
}
func init() {
      fmt.Println("models init")

    baseTimestamp = time.Now()
    fmt.Println(baseTimestamp)

    x, err := xorm.NewEngine("sqlite3", "user.db")
    fmt.Println(x, err)

}

proj\main.go

package main
import (
 "proj/models"
"fmt"
)

func main(){
    fmt.Println("now in main CallFuncFromMoles")
    models.CallFuncFromMoles()

}

go run main.go

ef20 UUID:0xf4f2e0 VARBINARY:0xf4f2e0 VARCHAR:0xf4f2e0 VERSION:0xf4eea0 YEAR:0xf4f2e0] <nil> map[] {{0 0} 0 0 0 0} 0xc0000ae128} <nil>
now in main CallFuncFromMoles
2021-03-17 21:09:08.1911855 +0800 CST m=+0.006000301
<nil>

baseTimestamp init和 CallFuncFromMoles都 有值

x 只在init 有值，CallFuncFromMoles为nil