使用GAE将对象保存到数据存储区.在获取它时,该对象具有空成员

Question

我正在尝试用GAE学习Go.我创建了2个处理程序.一个用于将对象保存到数据存储区,另一个用于检索它并输出到屏幕.问题是,当我从数据存储区检索UserAccount对象时,对象内的每个值都消失了.

任何帮助将是欣赏.

输出:

a/c count: 2 val: core.UserAccount{idString:"", deviceId:""} val: core.UserAccount{idString:"", deviceId:""}

type UserAccount struct {
    idString string
    deviceId string
}

func create_account(w http.ResponseWriter, r *http.Request) {

    c := appengine.NewContext(r)

        idstr := "ABCDEFGH"
        devId := r.FormValue("deviceId")

        newAccount := UserAccount{ idString: idstr, deviceId: devId,}

        key := datastore.NewIncompleteKey(c, "UserAccount", nil)
        _, err := datastore.Put(c, key, &newAccount)
        if err != nil {
            http.Error(w, err.Error(), http.StatusInternalServerError)
            return
    }

    fmt.Fprintf(w, "val: %#v \n", newAccount)
}

func get_info(w http.ResponseWriter, r *http.Request) {
    c := appengine.NewContext(r)

    q := datastore.NewQuery("UserAccount")
    accounts := make([]UserAccount, 0, 10)
    if _, err := q.GetAll(c, &accounts); err != nil {
        http.Error(w, err.Error(), http.StatusInternalServerError)
        return
    }

    fmt.Fprintf(w, "a/c count: %v \n", len(accounts))

    for i := 0; i < len(accounts); i++ {
        fmt.Fprintf(w, "val: %#v \n", accounts[i])
    }
}

Answer 1

如果数据存储区API使用反射(我认为它会这样做),则它无法访问未导出的结构字段,即不以大写字母开头的字段名称.

导出它们应该有效.