【发布时间】：2020-09-14 22:05:53
【问题描述】：
在我将 Firestore android sdk 从 v20.1.0 升级到 v21.6.0 后，我的 Firestore 查询没有按预期工作。 如果我对单个文档进行简单的 get() 查询或 snapshotListener 查询（实时），查询工作一次（或两次）然后停止工作或获取更新（如果是实时查询），onEvent() 方法不会触发。
经过深入调查和多次测试，我们（我的工作团队）发现造成这种情况的原因是我们的每个文档都包含一个大型 Map 字段，其中至少有 5 级多键值对。 我们的地图字段称为“items”，当我们尝试将其从文档中删除时，实时查询可以正常工作。
P.S：我们尝试检查文档的大小，平均在 6k 字节到 5k 字节之间，Firestore 允许 1Mb（1M 字节）作为最大文档大小。
要重现该错误，请按照以下步骤操作：
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将此行添加到您的项目 gradle 文件中：
dependencies { classpath 'com.google.gms:google-services:4.3.3' } -
将这两行添加到 module:app gradle 文件中：
dependencies { implementation 'com.google.firebase:firebase-firestore:21.6.0' implementation 'com.google.code.gson:gson:2.8.6' } -
添加此代码以创建我的文档的副本并将其写入 火库：
private void createAndWriteDocument() { GsonBuilder gsonBuilder = new GsonBuilder(); gsonBuilder.setDateFormat("MMM d, yyyy HH:mm:ss"); gson = gsonBuilder.create(); FirebaseFirestore.getInstance() .collection(COLLECTION_ORDERS) .document("ZYaJKmQF9n1RknziD1tj") .set(gson.fromJson(jsonOrder2, FireStoreOrder.class)); } private final String jsonOrder2 = "{\n" + " \"app_name\":\"Firestore-Sample\",\n" + " \"app_version\":\"1.0.0\",\n" + " \"canceled_at\":\"Sep 4, 2020 15:12:34\",\n" + " \"comments_count\":4,\n" + " \"countryID\":\"fr\",\n" + " \"created_at\":\"Sep 4, 2020 12:21:55\",\n" + " \"currency\":\"EUR\",\n" + " \"delivered_at\":\"Sep 4, 2020 15:11:30\",\n" + " \"delivery_agent_id\":\"1rvlTtfJKNVPVxZ2mp4T2CcI1Fj2\",\n" + " \"delivery_assignment_status\":\"accepted\",\n" + " \"delivery_fee\":5.0,\n" + " \"distance\":3.2547,\n" + " \"hearts_count\":0,\n" + " \"in_progress_at\":\"Sep 4, 2020 15:06:51\",\n" + " \"is_friends\":false,\n" + " \"is_private\":false,\n" + " \"is_public\":true,\n" + " \"is_visible\":true,\n" + " \"items\":{\n" + " \"-MGNqMoKy8YovI11-QUK\":{\n" + " \"category_id\":\"-LlbKEnwkC4KZtJyN691\",\n" + " \"discount_price\":0.0,\n" + " \"extras\":{\n" + " \"-M1-qhcXr8tp5KpnLp9p\":{\n" + " \"max\":10,\n" + " \"name\":\"Chèvre\",\n" + " \"price\":0.6,\n" + " \"quantity\":5,\n" + " \"row\":6\n" + " },\n" + " \"-M1-rHnm7Xzjo7rE73Pk\":{\n" + " \"max\":10,\n" + " \"name\":\"Vache kiri\",\n" + " \"price\":0.6,\n" + " \"quantity\":7,\n" + " \"row\":4\n" + " },\n" + " \"-M1-me-3qKOqWzul67Sr\":{\n" + " \"is_sub_extra\":true,\n" + " \"max\":3,\n" + " \"name\":\"Crispy Tenders\",\n" + " \"price\":0.0,\n" + " \"quantity\":1,\n" + " \"row\":0\n" + " },\n" + " \"-M1-mKvK76SYLJBf3zh-\":{\n" + " \"is_sub_extra\":true,\n" + " \"max\":3,\n" + " \"name\":\"Escalope de Poulet\",\n" + " \"price\":0.0,\n" + " \"quantity\":2,\n" + " \"row\":0\n" + " },\n" + " \"-M1-rNaEFCyHlf9WIOaH\":{\n" + " \"max\":10,\n" + " \"name\":\"Raclette\",\n" + " \"price\":0.6,\n" + " \"quantity\":4,\n" + " \"row\":5\n" + " }\n" + " },\n" + " \"extras_title\":\"Suppléments\",\n" + " \"ingredients\":{\n" + " \"-MEYbO7SlOBFWUVzcvg6\":{\n" + " \"description\":\"Ingredients description\",\n" + " \"name\":\"Cheddar\",\n" + " \"row\":0\n" + " },\n" + " \"-MEYbLvKvqPu3YZPPAjo\":{\n" + " \"description\":\"Ingredients description\",\n" + " \"name\":\"Laitus\",\n" + " \"row\":0\n" + " }\n" + " },\n" + " \"ingredients_title\":\"Ingrédients : Décocher pour enlever\",\n" + " \"itemPrice\":0.0,\n" + " \"main_image\":{\n" + " \"ref\":\"/ZKRBeLgCauXKZ15rfRcuQTY2S1k1/-LlXe_ZbTQytlKujrhLF/products/1582717663739.jpg\",\n" + " \"url\":\"https://firebasestorage.googleapis.com/v0/b/urban-food-a9a70.appspot.com/o/ZKRBeLgCauXKZ15rfRcuQTY2S1k1%2F-LlXe_ZbTQytlKujrhLF%2Fproducts%2F1582717663739.jpg?alt\\u003dmedia\\u0026token\\u003d1bbfd8a0-be5a-44c2-8dd9-d5a7dacf2243\"\n" + " },\n" + " \"max_extras\":30,\n" + " \"name\":\"Tacos\",\n" + " \"options\":{\n" + " \"-LlfWYJR_zKtO1l0DjnF\":{\n" + " \"elements\":{\n" + " \"-LlfWj5L6weXYZUPUoGW\":{\n" + " \"extras_title\":\"3 Viandes\",\n" + " \"max\":1,\n" + " \"max_extras\":3,\n" + " \"min_extras\":3,\n" + " \"name\":\"L : Choisir 3 Viandes\",\n" + " \"price\":9.5,\n" + " \"row\":0\n" + " }\n" + " },\n" + " \"name\":\"Taille\",\n" + " \"row\":-1\n" + " },\n" + " \"-LlfX5HY1rzcQpz1p6mG\":{\n" + " \"elements\":{\n" + " \"-LlfXbVB-QA-utApD3HO\":{\n" + " \"max\":3,\n" + " \"name\":\"Barbecue\",\n" + " \"price\":0.0,\n" + " \"quantity\":2,\n" + " \"row\":0\n" + " },\n" + " \"-LlfXxF-7RRTZhFwXhyX\":{\n" + " \"max\":3,\n" + " \"name\":\"Marocaine\",\n" + " \"price\":0.0,\n" + " \"quantity\":2,\n" + " \"row\":0\n" + " }\n" + " },\n" + " \"max_quantity\":4,\n" + " \"min_quantity\":1,\n" + " \"name\":\"Sauces\",\n" + " \"row\":3\n" + " },\n" + " \"-LlfWPIAjjgTiqtqEzep\":{\n" + " \"elements\":{\n" + " \"-LlfWPI9_w1gH1A3HTsB\":{\n" + " \"name\":\"Tacos\",\n" + " \"price\":0.0,\n" + " \"row\":0\n" + " }\n" + " },\n" + " \"name\":\"Type\",\n" + " \"row\":2\n" + " }\n" + " },\n" + " \"price\":0.0,\n" + " \"product_id\":\"-LlfTFlgrNBdLZRn5xgn\",\n" + " \"quantity\":2,\n" + " \"sub_category_id\":\"-LlbKEnvPMIV3DnSiYlJ\"\n" + " },\n" + " \"-MGNqOGcRfYb-myLgc1d\":{\n" + " \"category_id\":\"-LlkUx5iBSXhKdMYGxTA\",\n" + " \"discount_price\":3.5,\n" + " \"extras\":{\n" + " \"-M2JOJaB_Gsc28GT8wEg\":{\n" + " \"max\":2,\n" + " \"name\":\"Harissa\",\n" + " \"price\":0.0,\n" + " \"quantity\":1,\n" + " \"row\":2\n" + " }\n" + " },\n" + " \"extras_title\":\"Sauces\",\n" + " \"itemPrice\":0.0,\n" + " \"main_image\":{\n" + " \"ref\":\"/ZKRBeLgCauXKZ15rfRcuQTY2S1k1/-LlXe_ZbTQytlKujrhLF/products/1582809519364.jpg\",\n" + " \"url\":\"https://firebasestorage.googleapis.com/v0/b/urban-food-a9a70.appspot.com/o/ZKRBeLgCauXKZ15rfRcuQTY2S1k1%2F-LlXe_ZbTQytlKujrhLF%2Fproducts%2F1582809519364.jpg?alt\\u003dmedia\\u0026token\\u003dabc457cb-2462-44be-886a-af83db3cb501\"\n" + " },\n" + " \"max_extras\":2,\n" + " \"name\":\"Oignons frites\",\n" + " \"options\":{\n" + " \"-M15mpsXwAzsDRlLDHJI\":{\n" + " \"elements\":{\n" + " \"-M15mpsXwAzsDRlLDHJG\":{\n" + " \"name\":\"Cheddar\",\n" + " \"price\":0.0,\n" + " \"row\":0\n" + " }\n" + " },\n" + " \"name\":\"Au choix :\",\n" + " \"row\":-1\n" + " }\n" + " },\n" + " \"price\":3.5,\n" + " \"product_id\":\"-M15mV_4Ui2B90GlzsaR\",\n" + " \"quantity\":1,\n" + " \"sub_category_id\":\"-LlkUx5h8rXECP8L_hjQ\"\n" + " },\n" + " \"-MGNqOxoHFGoigUXao96\":{\n" + " \"category_id\":\"-LlkUx5iBSXhKdMYGxTA\",\n" + " \"discount_price\":3.5,\n" + " \"extras\":{\n" + " \"-M2JOmBf1oN1BmUUHeiY\":{\n" + " \"name\":\"Biggy burger\",\n" + " \"price\":0.0,\n" + " \"quantity\":1,\n" + " \"row\":0\n" + " }\n" + " },\n" + " \"itemPrice\":0.0,\n" + " \"main_image\":{\n" + " \"ref\":\"/ZKRBeLgCauXKZ15rfRcuQTY2S1k1/-LlXe_ZbTQytlKujrhLF/products/1582809369789.jpg\",\n" + " \"url\":\"https://firebasestorage.googleapis.com/v0/b/urban-food-a9a70.appspot.com/o/ZKRBeLgCauXKZ15rfRcuQTY2S1k1%2F-LlXe_ZbTQytlKujrhLF%2Fproducts%2F1582809369789.jpg?alt\\u003dmedia\\u0026token\\u003d705593e0-e403-4931-b040-5b2261cb96e5\"\n" + " },\n" + " \"name\":\"Bacon frites\",\n" + " \"options\":{\n" + " \"-M15lyQyHs1GujtZxMtS\":{\n" + " \"elements\":{\n" + " \"-M15lyQxrRFaLAWGaa3i\":{\n" + " \"name\":\"Sauce fromagère\",\n" + " \"price\":0.0,\n" + " \"row\":0\n" + " }\n" + " },\n" + " \"name\":\"Au choix :\",\n" + " \"row\":-1\n" + " }\n" + " },\n" + " \"price\":3.5,\n" + " \"product_id\":\"-M15lqmhF16ZOLqebPzs\",\n" + " \"quantity\":1,\n" + " \"sub_category_id\":\"-LlkUx5h8rXECP8L_hjQ\"\n" + " }\n" + " },\n" + " \"itemsCount\":0,\n" + " \"level_one_zone_id\":\"Île-de-France\",\n" + " \"level_two_zone_id\":\"Paris\",\n" + " \"order_id\":\"ZYaJKmQF9n1RknziD1tj\",\n" + " \"order_number\":31,\n" + " \"order_type\":\"delivery\",\n" + " \"paid\":false,\n" + " \"paid_with_loyalty\":0.0,\n" + " \"picked_at\":\"Sep 4, 2020 15:12:46\",\n" + " \"platform\":\"android\",\n" + " \"processedAt\":{\n" + " \"nanoseconds\":994000000,\n" + " \"seconds\":1599228406\n" + " },\n" + " \"restaurant_photo\":\"https://firebasestorage.googleapis.com/v0/b/menutium-319d0.appspot.com/o/LHx3fTdtoaRlrAHSjznJSaPz9rP2%2F-MEYUb7iepk3pLwUyWX3%2Fprofile%2F1597250393877.jpg?alt\\u003dmedia\\u0026token\\u003dcbccd3fe-91fd-4397-ab34-79f5f241def2\",\n" + " \"status\":\"picked\",\n" + " \"store_id\":\"-MEYUb7iepk3pLwUyWX3\",\n" + " \"store_name\":\"La Fourchette\",\n" + " \"total_price\":50.2,\n" + " \"updated_at\":\"Sep 7, 2020 18:54:02\",\n" + " \"user_address\":\"166 Quai de Stalingrad, 92130 Issy-les-Moulineaux, France\\nIssy-les-Moulineaux\",\n" + " \"user_coordinates\":\"48.8256954,2.2579879\",\n" + " \"user_name\":\"Mo Salah\",\n" + " \"user_phone\":\"+21650001002\",\n" + " \"user_photo\":\"https://firebasestorage.googleapis.com/v0/b/menutium-319d0.appspot.com/o/2Bz8euUmPgMqc4Z7QZWJjLfsgV72%2Fphoto_profile?alt\\u003dmedia\\u0026token\\u003df5dcee5b-fdda-45bd-9ec3-982cfe7832bd\",\n" + " \"user_uid\":\"2Bz8euUmPgMqc4Z7QZWJjLfsgV72\",\n" + " \"validated_at\":\"Sep 4, 2020 15:12:42\",\n" + " \"validatedBy\":{\n" + " \"name\":\"Urban-Admin\",\n" + " \"id\":\"admin\"\n" + " }\n" + "}"; -
开始对此文档的实时查询：
FirebaseFirestore.getInstance() .collection("orders") .document("ZYaJKmQF9n1RknziD1tj") .addSnapshotListener(new EventListener<DocumentSnapshot>() { @Override public void onEvent(@Nullable DocumentSnapshot value, @Nullable FirebaseFirestoreException error) { Log.d("testing", "onEvent triggered"); if (error != null) { Log.i("testing", "test error : "+ error.getMessage()); } } });
我们创建了两个 Android 项目（Java 代码），将它们放入公共 Github 存储库，以便任何人都可以重现我们面临的问题。
自述文件中详细介绍了所有内容。
【问题讨论】：
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在 Stack Overflow 上，必须将相关代码复制到问题中 - 请编辑问题以执行此操作。不要链接到外部资源，因为这些资源不能保证与此问题具有相同的生命周期，并且将来对其他人没有帮助。
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Doug 的评论是有效的，另一方面，如果你确定这是一个错误，请在firebase.google.com/support/troubleshooter/report/bugs 提出这个问题
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感谢大家的评论。我确实发送了关于 firebase 疑难解答的错误报告。我正在考虑我应该在我的问题中设置什么代码，因为 stackoverflow 只接受 30k 个字符:'(
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您应该展示重现问题的完整、最少的代码。 stackoverflow.com/help/minimal-reproducible-example
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@DougStevenson，先生，请考虑认真对待这个问题，我们已经使用 Firebase Firestore 一年多了，我们从来没有遇到过这样的错误，它总是很快，而且性能很好。我们必须降级到 v20.1.0 才能让我们的应用程序正常工作。如果重现问题的最少代码超过 Stackoverflow 中允许的最大字符数怎么办？我们只是关闭问题？显然，据我所知，在 Github 中创建一个免费的公共存储库，使用最少的代码来重现问题是最佳实践。
标签： java android firebase google-cloud-firestore