我正在使用Firebase，并且已经开始尝试使用Firebase模拟器运行本地开发实例。我正在运行Firebase Tools v8.4.1。当我使用真实的Firestore数据库运行时，一切正常。但是，当我使用仿真器时出现了问题。
我可以先set然后通过JavaScript get进行文档操作，但是在Firebase Emulators UI中什么也没显示，反之亦然，当我通过Firebase Emulators UI添加数据时，它不可用在Javascript中使用get。另外，当我使用Firebase Tools CLI的导入和导出功能时，我通过Javascript添加的所有数据均不会导出和导入。我在浏览器控制台中没有任何错误。
我不确定初始化Firebase或我缺少的其他配置时是否做错了什么？
我正在跑步：firebase emulators:start --only functions,firestore
Firebase设置代码
import * as firebase from 'firebase/app';
import 'firebase/auth';
import 'firebase/firestore';
import 'firebase/functions';
const db = firebase.initializeApp({
apiKey: 'my_api_key',
appId: 'my_app_id',
authDomain: 'my_auth_domain',
databaseURL: 'my_database_url',
messagingSenderId: 'my_messaging_sender_id',
projectId: 'my_project_id',
storageBucket: 'my_storage_bucket',
}).firestore();
if (process.env.NODE_ENV === 'development') {
firebase.setLogLevel('debug');
db.settings({
host: 'localhost:8000',
ssl: false,
});
firebase.functions().useFunctionsEmulator('http://localhost:5001');
}
export { db };
firebase.json
{
"firestore": {
"rules": "firestore.rules",
"indexes": "firestore.indexes.json"
},
"functions": {
"source": "packages/functions"
},
"hosting": {
"public": "packages/frontend/dist",
"rewrites": [
{
"source": "**",
"destination": "/index.html"
}
]
},
"storage": {
"rules": "storage.rules"
},
"emulators": {
"functions": {
"port": 5001
},
"firestore": {
"port": 8000
},
"ui": {
"enabled": true
}
}
}
浏览器控制台
index.esm.js?abfd:106 [2020-05-30T03:18:23.148Z] @firebase/firestore: Firestore (7.14.5): FirestoreClient Initializing. user= Jgjhmnb23JHFDTRGEYK5Jppwed
index.esm.js?abfd:106 [2020-05-30T03:18:23.162Z] @firebase/firestore: Firestore (7.14.5): MemoryPersistence Starting transaction: Get last stream token
index.esm.js?abfd:106 [2020-05-30T03:18:23.164Z] @firebase/firestore: Firestore (7.14.5): MemoryPersistence Starting transaction: Get next mutation batch
index.esm.js?abfd:106 [2020-05-30T03:18:23.166Z] @firebase/firestore: Firestore (7.14.5): MemoryPersistence Starting transaction: Allocate target
index.esm.js?abfd:106 [2020-05-30T03:18:23.167Z] @firebase/firestore: Firestore (7.14.5): MemoryPersistence Starting transaction: Execute query
index.esm.js?abfd:106 [2020-05-30T03:18:23.168Z] @firebase/firestore: Firestore (7.14.5): IndexFreeQueryEngine Using full collection scan to execute query: Query(target=Target(categories, orderBy: [name (asc), __name__ (asc)]); limitType=F)
index.esm.js?abfd:106 [2020-05-30T03:18:23.173Z] @firebase/firestore: Firestore (7.14.5): Connection Creating WebChannel: http://localhost:8000/google.firestore.v1.Firestore/Listen/channel [object Object]
index.esm.js?abfd:106 [2020-05-30T03:18:23.178Z] @firebase/firestore: Firestore (7.14.5): Connection Opening WebChannel transport.
index.esm.js?abfd:106 [2020-05-30T03:18:23.180Z] @firebase/firestore: Firestore (7.14.5): Connection WebChannel sending: {"database":"projects/vendida-a17e6/databases/(default)","addTarget":{"query":{"structuredQuery":{"from":[{"collectionId":"categories"}],"orderBy":[{"field":{"fieldPath":"name"},"direction":"ASCENDING"},{"field":{"fieldPath":"__name__"},"direction":"ASCENDING"}]},"parent":"projects/my-project-ha47s/databases/(default)/documents"},"targetId":2}}
index.esm.js?abfd:106 [2020-05-30T03:18:23.217Z] @firebase/firestore: Firestore (7.14.5): Connection WebChannel transport opened.
index.esm.js?abfd:106 [2020-05-30T03:18:23.241Z] @firebase/firestore: Firestore (7.14.5): Connection WebChannel received: {"targetChange":{"targetChangeType":"ADD","targetIds":[2]}}
index.esm.js?abfd:106 [2020-05-30T03:18:23.242Z] @firebase/firestore: Firestore (7.14.5): Connection WebChannel received: {"targetChange":{"targetChangeType":"CURRENT","targetIds":[2],"resumeToken":"HGfhjBG7dfU56Gn=","readTime":"2020-05-30T03:18:23.208926Z"}}
index.esm.js?abfd:106 [2020-05-30T03:18:23.242Z] @firebase/firestore: Firestore (7.14.5): Connection WebChannel received: {"targetChange":{"resumeToken":"YFgT/hjfF76fWj1=","readTime":"2020-05-30T03:18:23.209597Z"}}
index.esm.js?abfd:106 [2020-05-30T03:18:23.244Z] @firebase/firestore: Firestore (7.14.5): MemoryPersistence Starting transaction: Get last remote snapshot version
index.esm.js?abfd:106 [2020-05-30T03:18:23.246Z] @firebase/firestore: Firestore (7.14.5): MemoryPersistence Starting transaction: Apply remote event
index.esm.js?abfd:106 [2020-05-30T03:18:23.248Z] @firebase/firestore: Firestore (7.14.5): MemoryPersistence Starting transaction: notifyLocalViewChanges
firestore-debug.log
May 30, 2020 1:08:25 PM io.gapi.emulators.netty.HttpVersionRoutingHandler channelRead
INFO: Detected non-HTTP/2 connection.
May 30, 2020 1:09:06 PM io.gapi.emulators.netty.HttpVersionRoutingHandler channelRead
INFO: Detected non-HTTP/2 connection.
May 30, 2020 1:09:25 PM io.gapi.emulators.netty.HttpVersionRoutingHandler channelRead
INFO: Detected non-HTTP/2 connection.
firebase-debug.log
[debug] [2020-05-30T03:10:25.924Z] May 30, 2020 1:10:25 PM io.gapi.emulators.netty.HttpVersionRoutingHandler channelRead
INFO: Detected non-HTTP/2 connection.
{"metadata":{"emulator":{"name":"firestore"},"message":"May 30, 2020 1:10:25 PM io.gapi.emulators.netty.HttpVersionRoutingHandler channelRead\nINFO: Detected non-HTTP/2 connection.\n"}}
[debug] [2020-05-30T03:11:06.713Z] May 30, 2020 1:11:06 PM io.gapi.emulators.netty.HttpVersionRoutingHandler channelRead
INFO: Detected non-HTTP/2 connection.
{"metadata":{"emulator":{"name":"firestore"},"message":"May 30, 2020 1:11:06 PM io.gapi.emulators.netty.HttpVersionRoutingHandler channelRead\nINFO: Detected non-HTTP/2 connection.\n"}}
[debug] [2020-05-30T03:11:25.949Z] May 30, 2020 1:11:25 PM io.gapi.emulators.netty.HttpVersionRoutingHandler channelRead
INFO: Detected non-HTTP/2 connection.
{"metadata":{"emulator":{"name":"firestore"},"message":"May 30, 2020 1:11:25 PM io.gapi.emulators.netty.HttpVersionRoutingHandler channelRead\nINFO: Detected non-HTTP/2 connection.\n"}}
答案 0 :(得分：2)
原来，该问题是由于Firebase Tools的当前状态引起的。我以前曾经将Firebase Tools与另一个项目一起使用，并且必须为要在其中使用模拟器的当前项目运行use命令：
firebase use project_name
现在一切正常。