在 Go 中使用 AppEngine 从 Firestore 读取不一致

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如何解决在 Go 中使用 AppENGIne 从 Firestore 读取不一致？

开发过程中遇到在 Go 中使用 AppENGIne 从 Firestore 读取不一致的问题如何解决？下面主要结合日常开发的经验，给出你关于在 Go 中使用 AppENGIne 从 Firestore 读取不一致的解决方法建议，希望对你解决在 Go 中使用 AppENGIne 从 Firestore 读取不一致有所启发或帮助；

我有一个用 Go 编写并部署到 Google AppENGIne 的后端。它使用 Firestore 作为数据库。路由器是 chi。

当我现在尝试阅读模型中最重要的部分时，我得到了不一致的结果。 它在 null 和 true 之间切换。我已经检查了 Firebase 控制台。它绝对设置为 true 并且不会切换。

这是定义相关字段的模型：

type transactionModel struct {
    // ...
    Succeeded          bool   `Json:"succeeded,omitempty" firestore:"succeeded"`
}

这是处理请求的服务器函数：

func (s *servicE) getPaymentData(w http.ResponseWriter,r *http.request) {
    slug := chi.URLParam(r,"slug")
    ID := chi.URLParam(r,"ID")

    doc,err := s.db.Collection("payment/" + slug + "/transactions").Doc(ID).Get(r.Context())
    if err != nil {
        w.Writeheader(http.StatusnotFound)
        logrus.WithError(err).Error("Could not get document")
        Json.NewEncoder(w).Encode(&ErrorResponse{
            Error: "Could not finde merchant",})
        return
    }

    t := transactionModel{}
    if err := doc.DataTo(&t); err != nil {
        logrus.WithError(err).Error("Could not convert data")
    }
    logrus.Printf("payment succeeded: %v",t.Succeeded)

    if err := Json.NewEncoder(w).Encode(t); err != nil {
        logrus.WithError(err).Error("Could not encode Json")
    }
}

我在代码中找不到错误。你发现错误了吗？

我也认为这可能是某种缓存问题。所以我添加了 NoCache 中间件。

curl -X GET http://.../merchant/lbk/U2qtsuSl3UXtaSOTNeWU -I
http/1.1 200 OK
Content-Type: text/plain; charset=utf-8
vary: Accept-EnCoding
Cache-Control: no-cache,no-store,no-transform,must-revalIDate,private,max-age=0
Expires: Thu,01 Jan 1970 00:00:00 UTC
Pragma: no-cache
vary: Origin
X-Cloud-Trace-Context: b521b80bb93676648d62054412ec30d0
Date: Wed,14 Jul 2021 23:44:15 GMT
Server: Google Frontend
Content-Length: 484

最后这里是一些日志，显示行为：

2021-07-14 23:31:44 default[20210715t012755]  "GET /merchant/lbk/U2qtsuSl3UXtaSOTNeWU http/1.1" 200
2021-07-14 23:31:44 default[20210715t012755]  time="2021-07-14T23:31:44Z" level=info msg="payment succeeded: false"
2021-07-14 23:31:44 default[20210715t012755]  2021/07/14 23:31:44 "GET http://.../merchant/lbk/U2qtsuSl3UXtaSOTNeWU http/1.1" from 127.0.0.1:62003 - 200 467B in 94.649171ms
2021-07-14 23:31:45 default[20210715t012755]  "GET /merchant/lbk/U2qtsuSl3UXtaSOTNeWU http/1.1" 200
2021-07-14 23:31:45 default[20210715t012755]  time="2021-07-14T23:31:45Z" level=info msg="payment succeeded: true"
2021-07-14 23:31:45 default[20210715t012755]  2021/07/14 23:31:45 "GET http://.../merchant/lbk/U2qtsuSl3UXtaSOTNeWU http/1.1" from 127.0.0.1:62003 - 200 484B in 12.522468ms
2021-07-14 23:31:46 default[20210715t012755]  "GET /merchant/lbk/U2qtsuSl3UXtaSOTNeWU http/1.1" 200
2021-07-14 23:31:46 default[20210715t012755]  time="2021-07-14T23:31:46Z" level=info msg="payment succeeded: false"
2021-07-14 23:31:46 default[20210715t012755]  2021/07/14 23:31:46 "GET http://.../merchant/lbk/U2qtsuSl3UXtaSOTNeWU http/1.1" from 127.0.0.1:62003 - 200 467B in 9.618494ms
2021-07-14 23:31:46 default[20210715t012755]  "GET /merchant/lbk/U2qtsuSl3UXtaSOTNeWU http/1.1" 200
2021-07-14 23:31:46 default[20210715t012755]  time="2021-07-14T23:31:46Z" level=info msg="payment succeeded: false"
2021-07-14 23:31:46 default[20210715t012755]  2021/07/14 23:31:46 "GET http://.../merchant/lbk/U2qtsuSl3UXtaSOTNeWU http/1.1" from 127.0.0.1:62003 - 200 467B in 11.686507ms
2021-07-14 23:31:47 default[20210715t012755]  "GET /merchant/lbk/U2qtsuSl3UXtaSOTNeWU http/1.1" 200
2021-07-14 23:31:47 default[20210715t012755]  time="2021-07-14T23:31:47Z" level=info msg="payment succeeded: true"
2021-07-14 23:31:47 default[20210715t012755]  2021/07/14 23:31:47 "GET http://.../merchant/lbk/U2qtsuSl3UXtaSOTNeWU http/1.1" from 127.0.0.1:62003 - 200 484B in 35.701781ms
2021-07-14 23:31:48 default[20210715t012755]  "GET /merchant/lbk/U2qtsuSl3UXtaSOTNeWU http/1.1" 200
2021-07-14 23:31:48 default[20210715t012755]  time="2021-07-14T23:31:48Z" level=info msg="payment succeeded: true"
2021-07-14 23:31:48 default[20210715t012755]  2021/07/14 23:31:48 "GET http://.../merchant/lbk/U2qtsuSl3UXtaSOTNeWU http/1.1" from 127.0.0.1:62003 - 200 484B in 98.327564ms
2021-07-14 23:31:48 default[20210715t012755]  "GET /merchant/lbk/U2qtsuSl3UXtaSOTNeWU http/1.1" 200
2021-07-14 23:31:48 default[20210715t012755]  time="2021-07-14T23:31:48Z" level=info msg="payment succeeded: false"
2021-07-14 23:31:49 default[20210715t012755]  "GET /merchant/lbk/U2qtsuSl3UXtaSOTNeWU http/1.1" 200
2021-07-14 23:31:50 default[20210715t012755]  time="2021-07-14T23:31:50Z" level=info msg="payment succeeded: true"
2021-07-14 23:31:50 default[20210715t012755]  2021/07/14 23:31:50 "GET http://.../merchant/lbk/U2qtsuSl3UXtaSOTNeWU http/1.1" from 127.0.0.1:62003 - 200 484B in 86.243205ms
2021-07-14 23:31:50 default[20210715t012755]  "GET /merchant/lbk/U2qtsuSl3UXtaSOTNeWU http/1.1" 200
2021-07-14 23:31:50 default[20210715t012755]  time="2021-07-14T23:31:50Z" level=info msg="payment succeeded: false"
2021-07-14 23:31:50 default[20210715t012755]  2021/07/14 23:31:50 "GET http://.../merchant/lbk/U2qtsuSl3UXtaSOTNeWU http/1.1" from 127.0.0.1:62003 - 200 467B in 13.210213ms
2021-07-14 23:31:51 default[20210715t012755]  "GET /merchant/lbk/U2qtsuSl3UXtaSOTNeWU http/1.1" 200
2021-07-14 23:31:51 default[20210715t012755]  time="2021-07-14T23:31:51Z" level=info msg="payment succeeded: false"
2021-07-14 23:31:51 default[20210715t012755]  2021/07/14 23:31:51 "GET http://.../merchant/lbk/U2qtsuSl3UXtaSOTNeWU http/1.1" from 127.0.0.1:62003 - 200 467B in 10.602363ms
2021-07-14 23:31:52 default[20210715t012755]  "GET /merchant/lbk/U2qtsuSl3UXtaSOTNeWU http/1.1" 200
2021-07-14 23:31:52 default[20210715t012755]  time="2021-07-14T23:31:52Z" level=info msg="payment succeeded: false"
2021-07-14 23:31:52 default[20210715t012755]  2021/07/14 23:31:52 "GET http://.../merchant/lbk/U2qtsuSl3UXtaSOTNeWU http/1.1" from 127.0.0.1:62003 - 200 467B in 29.447106ms
2021-07-14 23:31:52 default[20210715t012755]  "GET /merchant/lbk/U2qtsuSl3UXtaSOTNeWU http/1.1" 200
2021-07-14 23:31:52 default[20210715t012755]  time="2021-07-14T23:31:52Z" level=info msg="payment succeeded: false"
2021-07-14 23:31:52 default[20210715t012755]  2021/07/14 23:31:52 "GET http://.../merchant/lbk/U2qtsuSl3UXtaSOTNeWU http/1.1" from 127.0.0.1:62003 - 200 467B in 89.032489R_361_11845@s

我目前不知道该怎么办。我还检查了 Firestore 在状态仪表板上是否有活动事件。

解决方法

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