发布版本中的书面数据缺少Firebase时间戳

本文介绍了发布版本中的书面数据缺少Firebase时间戳的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

这是一个包含Firebase Android SDK 9.6.1的Android应用程序。我为所有数据库读/写操作使用数据对象，其中许多包含时间戳。每个时间戳的数据类都包含这些属性： $ b保护对象createdAt = ServerValue .TIMESTAMP; @PropertyName（updated_at）保护对象updatedAt = ServerValue.TIMESTAMP; @Exclude @Nullable public Long getCreatedAtMillis（）{ return createdAt instanceof Long？ （长）createdAt：null; @Exclude @Nullable public Long getUpdatedAtMillis（）{ return createdAt instanceof Long？ （Long）updatedAt：null;

在调试版本中，一切正常。成功写入的样本日志： $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ D $ / $ ：/ comments / -KTtr6cXy222oW2kcaGL { comment =调试测试 commenter = M6PsqPsESGfcY7CKa9V8Gcdo1qu2 context =观察 created_at = {。sv = timestamp} id = -KTtr6cXy222oW2kcaGL parent = -KTpqfowI4T25gmXCfKY updated_at = {。sv = timestamp} } D / Connection：conn_1 - 发送数据：{d = {id = - KTtr6cXy222oW2kcaGL，context = observation，commenter = M6PsqPsESGfcY7CKa9V8Gcdo1qu2，parent = -KTpqfowI4T25gmXCfKY，created_at = {。sv = timestamp}，updated_at = {。sv = timestamp}，comment = Debug test}，p = comments / -KTtr6cXy222oW2kcaGL}，r = 21 ，a = p}，t = d}

在发布模式下构建相同的代码，从导致验证的书面数据中缺失错误： $ b $ pre $ 10-12 13：13：48.014 5735-5863 / org.naturenet D / RepoOperation：set：/ comments / -KTtsg2SpkVTR9zYWgvs 10-12 13：13：48.014 5735-5863 / org.naturenet D / DataOperation：set：/ comments / -KTtsg2SpkVTR9zYWgvs { comment =发布测试 commenter = M6PsqPsESGfcY7CKa9V8Gcdo1qu2 context = observation id = -KTtsg2SpkVTR9zYWgvs parent = -KTpqfowI4T25gmXCfKY } 10-12 13：13：48.014 2974-2974 /？ D / KeyguardUpdateMonitor：收到广播com.lge.softkeypad.intent.HIDE 10-12 13：13：48.014 5735-5863 / org.naturenet D / Connection：conn_1 - 发送数据：{d = {b = { d = {id = -KTtsg2SpkVTR9zYWgvs，context = observation，commenter = M6PsqPsESGfcY7CKa9V8Gcdo1qu2，parent = -KTpqfowI4T25gmXCfKY，comment = Release test}，p = comments / -KTtsg2SpkVTR9zYWgvs}，r = 21，a = p}，t = d} 10-12 13：13：48.014 5735-5863 / org.naturenet D / WebSocket：ws_1 - 重置keepAlive。剩余时间：35383 10-12 13：13：48.014 5735-5863 / org.naturenet D / RepoOperation：中止事务路径：/ comments / -KTtsg2SpkVTR9zYWgvs。受影响：/评论/ -KTtsg2SpkVTR9zYWgvs ... 10-12 13：13：48.074 5735-5874 / org.naturenet D / WebSocket：ws_1 - ws message：{t：d ，d：{r：21，b：{s：permission_denied，d：Permission denied}}} 10-12 13：13：48.074 5735- 5863 / org.naturenet D / WebSocket：ws_1 - 重置keepAlive。剩余时间：44947 10-12 13：13：48.074 5735-5863 / org.naturenet D / WebSocket：ws_1 - HandleNewFrameCount：1 10-12 13：13：48.074 5735-5863 / org.naturenet D / WebSocket：ws_1 - handleIncomingFrame complete frame：{d = {b = {s = permission_denied，d = Permission denied}，r = 21}，t = d} 10-12 13：13：48.074 5735- 5863 / org.naturenet D / Connection：conn_1 - 收到的数据信息：{b = {s = permission_denied，d = Permission denied}，r = 21} 10-12 13：13：48.074 5735-5863 / org .naturenet D / PersistentConnection：pc_0 - p response：{s = permission_denied，d = Permission denied} 10-12 13：13：48.074 5735-5863 / org.naturenet W / RepoOperation：setValue at / comments / KTtsg2SpkVTR9zYWgvs失败：DatabaseError：权限被拒绝

更新：指向我添加的数据对象的proguard配置推荐的规则，然后更慷慨的规则，没有任何效果。 Gradle构建类型：

release { minifyEnabled false useProguard true proguardFile'proguard-rules.pro'}

proguard- rules.pro： $ b $ $ p $ -keepattributes签名 -keepattributes *注释* -keepattributes EnclosingMethod -keepattributes InnerClasses -keep class org.naturenet.data.model。* {*; }

更新2：不是程序 b

release { minifyEnabled false useProguard false }

与之前的行为相同。

解决方案

发现 Firebase在调试版本和发布版本中以不同方式序列化类成员。在发行版中，只有 public 成员被序列化。更改我的时间戳字段的可见性修复了这个问题： $ @ $ $ $ $ $ $ $ $ $ public Object createdAt = ServerValue.TIMESTAMP; @PropertyName（updated_at） public Object updatedAt = ServerValue.TIMESTAMP; ...

正确输出：

10-12 15：53：57.155 30970-31048 / org.naturenet D / RepoOperation：set：/ comments / -KTuSLOHLNQXZooBgBdz 10-12 15:53： 57.155 30970-31048 / org.naturenet D / DataOperation：set：/ comments / -KTuSLOHLNQXZooBgBdz { comment =发布测试 commenter = M6PsqPsESGfcY7CKa9V8Gcdo1qu2 context =观察 created_at = {。 sv = timestamp} id = -KTuSLOHLNQXZooBgBdz parent = -KTpqfowI4T25gmXCfKY updated_at = {。sv = timestamp} }

This is an Android app with Firebase Android SDK 9.6.1. I'm using data objects for all database read/write operations and many of them contain timestamps. Each of the timestamped data classes contain these attributes:

@PropertyName("created_at") protected Object createdAt = ServerValue.TIMESTAMP; @PropertyName("updated_at") protected Object updatedAt = ServerValue.TIMESTAMP; @Exclude @Nullable public Long getCreatedAtMillis() { return createdAt instanceof Long ? (Long)createdAt : null; } @Exclude @Nullable public Long getUpdatedAtMillis() { return createdAt instanceof Long ? (Long)updatedAt : null; }

In debug builds, everything works fine. Sample log of successful write:

D/RepoOperation: set: /comments/-KTtr6cXy222oW2kcaGL D/DataOperation: set: /comments/-KTtr6cXy222oW2kcaGL { comment=Debug test commenter=M6PsqPsESGfcY7CKa9V8Gcdo1qu2 context=observations created_at={.sv=timestamp} id=-KTtr6cXy222oW2kcaGL parent=-KTpqfowI4T25gmXCfKY updated_at={.sv=timestamp} } D/Connection: conn_1 - Sending data: {d={b={d={id=-KTtr6cXy222oW2kcaGL, context=observations, commenter=M6PsqPsESGfcY7CKa9V8Gcdo1qu2, parent=-KTpqfowI4T25gmXCfKY, created_at={.sv=timestamp}, updated_at={.sv=timestamp}, comment=Debug test}, p=comments/-KTtr6cXy222oW2kcaGL}, r=21, a=p}, t=d}

Building the same code in release mode, the timestamp fields are missing from the written data which causes a validation error:

10-12 13:13:48.014 5735-5863/org.naturenet D/RepoOperation: set: /comments/-KTtsg2SpkVTR9zYWgvs 10-12 13:13:48.014 5735-5863/org.naturenet D/DataOperation: set: /comments/-KTtsg2SpkVTR9zYWgvs { comment=Release test commenter=M6PsqPsESGfcY7CKa9V8Gcdo1qu2 context=observations id=-KTtsg2SpkVTR9zYWgvs parent=-KTpqfowI4T25gmXCfKY } 10-12 13:13:48.014 2974-2974/? D/KeyguardUpdateMonitor: received broadcast com.lge.softkeypad.intent.HIDE 10-12 13:13:48.014 5735-5863/org.naturenet D/Connection: conn_1 - Sending data: {d={b={d={id=-KTtsg2SpkVTR9zYWgvs, context=observations, commenter=M6PsqPsESGfcY7CKa9V8Gcdo1qu2, parent=-KTpqfowI4T25gmXCfKY, comment=Release test}, p=comments/-KTtsg2SpkVTR9zYWgvs}, r=21, a=p}, t=d} 10-12 13:13:48.014 5735-5863/org.naturenet D/WebSocket: ws_1 - Reset keepAlive. Remaining: 35383 10-12 13:13:48.014 5735-5863/org.naturenet D/RepoOperation: Aborting transactions for path: /comments/-KTtsg2SpkVTR9zYWgvs. Affected: /comments/-KTtsg2SpkVTR9zYWgvs ... 10-12 13:13:48.074 5735-5874/org.naturenet D/WebSocket: ws_1 - ws message: {"t":"d","d":{"r":21,"b":{"s":"permission_denied","d":"Permission denied"}}} 10-12 13:13:48.074 5735-5863/org.naturenet D/WebSocket: ws_1 - Reset keepAlive. Remaining: 44947 10-12 13:13:48.074 5735-5863/org.naturenet D/WebSocket: ws_1 - HandleNewFrameCount: 1 10-12 13:13:48.074 5735-5863/org.naturenet D/WebSocket: ws_1 - handleIncomingFrame complete frame: {d={b={s=permission_denied, d=Permission denied}, r=21}, t=d} 10-12 13:13:48.074 5735-5863/org.naturenet D/Connection: conn_1 - received data message: {b={s=permission_denied, d=Permission denied}, r=21} 10-12 13:13:48.074 5735-5863/org.naturenet D/PersistentConnection: pc_0 - p response: {s=permission_denied, d=Permission denied} 10-12 13:13:48.074 5735-5863/org.naturenet W/RepoOperation: setValue at /comments/-KTtsg2SpkVTR9zYWgvs failed: DatabaseError: Permission denied

Update: After being pointed to the proguard configuration for data objects I added the recommended rules, and then more generous rules to no effect.

Gradle build types:

release { minifyEnabled false useProguard true proguardFile 'proguard-rules.pro' }

proguard-rules.pro:

-keepattributes Signature -keepattributes *Annotation* -keepattributes EnclosingMethod -keepattributes InnerClasses -keep class org.naturenet.data.model.* { *; }

Update 2: It's not proguard

release { minifyEnabled false useProguard false }

Same behavior as before.

解决方案

After many incremental changes I found that Firebase serializes class members differently in debug vs release builds. In release, only public members are serialized. Changing the visibility of my timestamp fields fixed the issue:

@PropertyName("created_at") public Object createdAt = ServerValue.TIMESTAMP; @PropertyName("updated_at") public Object updatedAt = ServerValue.TIMESTAMP; ...

Correct output:

10-12 15:53:57.155 30970-31048/org.naturenet D/RepoOperation: set: /comments/-KTuSLOHLNQXZooBgBdz 10-12 15:53:57.155 30970-31048/org.naturenet D/DataOperation: set: /comments/-KTuSLOHLNQXZooBgBdz { comment=Release test commenter=M6PsqPsESGfcY7CKa9V8Gcdo1qu2 context=observations created_at={.sv=timestamp} id=-KTuSLOHLNQXZooBgBdz parent=-KTpqfowI4T25gmXCfKY updated_at={.sv=timestamp} }