muilty db insert

db_insert.go

sqlStr := "REPLACE INTO users VALUES "
    vals := []interface{}{}
    for _, user := range users {
        val := []interface{}{
            user.ID,
            user.FirstName,
            user.LastName,
        }
        q := strings.Repeat("?,", len(val))
        q = q[0:len(q) - 1]

        sqlStr += fmt.Sprintf("(%s),", q)
        vals = append(vals, val...)
    }
    sqlStr = sqlStr[0:len(sqlStr) - 1]
    db := shared.Database.CommonDB()
    //fmt.Println(sqlStr)
    //fmt.Println(vals...)
    stmt, err := db.Prepare(sqlStr)
    if (err != nil) {
        panic(err)
    }
    stmt.Exec(vals...)