通过云功能从Firestore检索信息时出错
这是我的Firestore数据库外观的屏幕截图。
我正在尝试从云函数中的index.js文件检索此信息我的index.js文件看起来像：
const functions = require('firebase-functions');
const express = require('express');
const firebase = require('firebase-admin');
const firebaseApp = firebase.initializeApp(
functions.config().firebase
);
const db = firebaseApp.firestore();
const app = express();
app.set('view engine','ejs');
//-------------------------------------------------------------------//
app.get("/home",function(req,res){
db.collection('users').get().then((snapshot)=>{
console.log(snapshot.docs);
});
});
exports.app = functions.https.onRequest(app);
当我运行命令时：firebase提供--only功能，托管我收到此错误：
⚠ Your requested "node" version "8" doesn't match your global version "12"
✔ functions: functions emulator started at http://localhost:5001
i functions: Watching "/home/chahat/Desktop/firebase 2.0/functions" for Cloud Functions...
i hosting: Serving hosting files from: public
✔ hosting: Local server: http://localhost:5000
⚠ functions: The Cloud Firestore emulator is not running, so calls to Firestore will affect production.
✔ functions[app]: http function initialized (http://localhost:5001/samsungmap-17515/us-central1/app).
⚠ functions: The Cloud Firestore emulator is not running, so calls to Firestore will affect production.
i functions: Beginning execution of "app"
i functions: Finished "app" in ~1s
i functions: Beginning execution of "app"
⚠ External network resource requested!
- URL: "http://169.254.169.254/computeMetadata/v1/instance"
- Be careful, this may be a production service.
⚠ External network resource requested!
- URL: "./computeMetadata/v1/instance"
- Be careful, this may be a production service.
> (node:6741) UnhandledPromiseRejectionWarning: Error: Could not load the default credentials. Browse to for more information.
> at GoogleAuth.getApplicationDefaultAsync (/home/chahat/Desktop/firebase 2.0/functions/node_modules/google-auth-library/build/src/auth/googleauth.js:160:19)
> at processTicksAndRejections (internal/process/task_queues.js:97:5)
> at async GoogleAuth.getClient (/home/chahat/Desktop/firebase 2.0/functions/node_modules/google-auth-library/build/src/auth/googleauth.js:502:17)
> at async GrpcClient._getCredentials (/home/chahat/Desktop/firebase 2.0/functions/node_modules/google-gax/build/src/grpc.js:92:24)
> at async GrpcClient.createStub (/home/chahat/Desktop/firebase 2.0/functions/node_modules/google-gax/build/src/grpc.js:213:23)
> (node:6741) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). To terminate the node process on unhandled promise rejection, use the CLI flag `--unhandled-rejections=strict` (see .html#cli_unhandled_rejections_mode). (rejection id: 2)
> (node:6741) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.
⚠ functions: Your function timed out after ~60s. To configure this timeout, see
.
> /usr/lib/node_modules/firebase-tools/lib/emulator/functionsEmulatorRuntime.js:619
> throw new Error("Function timed out.");
> ^
>
> Error: Function timed out.
> at Timeout._onTimeout (/usr/lib/node_modules/firebase-tools/lib/emulator/functionsEmulatorRuntime.js:619:23)
> at listOnTimeout (internal/timers.js:549:17)
> at processTimers (internal/timers.js:492:7)
// ------------ UPDATE --------------------------- //
使用后：
app.get("/home",function(req,res){
db.collection('users').get().then((snapshot)=>{
res.json(snapshot.docs)
});
});
而不是我的上一条原路线，我仍然遇到以下无法理解的错误。错误：
chahat@chahat:~/Desktop/firebase 2.0$ firebase serve --only functions,hosting
⚠ Your requested "node" version "8" doesn't match your global version "12"
✔ functions: functions emulator started at http://localhost:5001
i functions: Watching "/home/chahat/Desktop/firebase 2.0/functions" for Cloud Functions...
i hosting: Serving hosting files from: public
✔ hosting: Local server: http://localhost:5000
⚠ functions: The Cloud Firestore emulator is not running, so calls to Firestore will affect production.
✔ functions[app]: http function initialized (http://localhost:5001/samsungmap-17515/us-central1/app).
⚠ functions: The Cloud Firestore emulator is not running, so calls to Firestore will affect production.
i functions: Beginning execution of "app"
i functions: Finished "app" in ~1s
i functions: Beginning execution of "app"
⚠ External network resource requested!
- URL: "http://169.254.169.254/computeMetadata/v1/instance"
- Be careful, this may be a production service.
⚠ External network resource requested!
- URL: "./computeMetadata/v1/instance"
- Be careful, this may be a production service.
⚠ functions: The Cloud Firestore emulator is not running, so calls to Firestore will affect production.
i functions: Beginning execution of "app"
⚠ External network resource requested!
- URL: "http://169.254.169.254/computeMetadata/v1/instance"
- Be careful, this may be a production service.
⚠ External network resource requested!
- URL: "./computeMetadata/v1/instance"
- Be careful, this may be a production service.
> (node:16552) UnhandledPromiseRejectionWarning: Error: Could not load the default credentials. Browse to for more information.
> at GoogleAuth.getApplicationDefaultAsync (/home/chahat/Desktop/firebase 2.0/functions/node_modules/google-auth-library/build/src/auth/googleauth.js:160:19)
> at processTicksAndRejections (internal/process/task_queues.js:97:5)
> at async GoogleAuth.getClient (/home/chahat/Desktop/firebase 2.0/functions/node_modules/google-auth-library/build/src/auth/googleauth.js:502:17)
> at async GrpcClient._getCredentials (/home/chahat/Desktop/firebase 2.0/functions/node_modules/google-gax/build/src/grpc.js:92:24)
> at async GrpcClient.createStub (/home/chahat/Desktop/firebase 2.0/functions/node_modules/google-gax/build/src/grpc.js:213:23)
> (node:16552) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). To terminate the node process on unhandled promise rejection, use the CLI flag `--unhandled-rejections=strict` (see .html#cli_unhandled_rejections_mode). (rejection id: 2)
> (node:16552) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.
> (node:16583) UnhandledPromiseRejectionWarning: Error: Could not load the default credentials. Browse to for more information.
> at GoogleAuth.getApplicationDefaultAsync (/home/chahat/Desktop/firebase 2.0/functions/node_modules/google-auth-library/build/src/auth/googleauth.js:160:19)
> at processTicksAndRejections (internal/process/task_queues.js:97:5)
> at async GoogleAuth.getClient (/home/chahat/Desktop/firebase 2.0/functions/node_modules/google-auth-library/build/src/auth/googleauth.js:502:17)
> at async GrpcClient._getCredentials (/home/chahat/Desktop/firebase 2.0/functions/node_modules/google-gax/build/src/grpc.js:92:24)
> at async GrpcClient.createStub (/home/chahat/Desktop/firebase 2.0/functions/node_modules/google-gax/build/src/grpc.js:213:23)
> (node:16583) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). To terminate the node process on unhandled promise rejection, use the CLI flag `--unhandled-rejections=strict` (see .html#cli_unhandled_rejections_mode). (rejection id: 2)
> (node:16583) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.
⚠ functions: Your function timed out after ~60s. To configure this timeout, see
.
> /usr/lib/node_modules/firebase-tools/lib/emulator/functionsEmulatorRuntime.js:619
> throw new Error("Function timed out.");
> ^
>
> Error: Function timed out.
> at Timeout._onTimeout (/usr/lib/node_modules/firebase-tools/lib/emulator/functionsEmulatorRuntime.js:619:23)
> at listOnTimeout (internal/timers.js:549:17)
> at processTimers (internal/timers.js:492:7)
请帮助。谢谢
回答如下：如documentation中所述，您需要向客户端发送响应以终止该功能。如果您不发送响应，则该功能将超时。如果您尝试将所有文档寄回，则需要编写如下内容：
app.get("/home",function(req,res){
db.collection('users').get().then((snapshot)=>{
res.json(snapshot.docs)
});
});
通过云功能从Firestore检索信息时出错
这是我的Firestore数据库外观的屏幕截图。
我正在尝试从云函数中的index.js文件检索此信息我的index.js文件看起来像：
const functions = require('firebase-functions');
const express = require('express');
const firebase = require('firebase-admin');
const firebaseApp = firebase.initializeApp(
functions.config().firebase
);
const db = firebaseApp.firestore();
const app = express();
app.set('view engine','ejs');
//-------------------------------------------------------------------//
app.get("/home",function(req,res){
db.collection('users').get().then((snapshot)=>{
console.log(snapshot.docs);
});
});
exports.app = functions.https.onRequest(app);
当我运行命令时：firebase提供--only功能，托管我收到此错误：
⚠ Your requested "node" version "8" doesn't match your global version "12"
✔ functions: functions emulator started at http://localhost:5001
i functions: Watching "/home/chahat/Desktop/firebase 2.0/functions" for Cloud Functions...
i hosting: Serving hosting files from: public
✔ hosting: Local server: http://localhost:5000
⚠ functions: The Cloud Firestore emulator is not running, so calls to Firestore will affect production.
✔ functions[app]: http function initialized (http://localhost:5001/samsungmap-17515/us-central1/app).
⚠ functions: The Cloud Firestore emulator is not running, so calls to Firestore will affect production.
i functions: Beginning execution of "app"
i functions: Finished "app" in ~1s
i functions: Beginning execution of "app"
⚠ External network resource requested!
- URL: "http://169.254.169.254/computeMetadata/v1/instance"
- Be careful, this may be a production service.
⚠ External network resource requested!
- URL: "./computeMetadata/v1/instance"
- Be careful, this may be a production service.
> (node:6741) UnhandledPromiseRejectionWarning: Error: Could not load the default credentials. Browse to for more information.
> at GoogleAuth.getApplicationDefaultAsync (/home/chahat/Desktop/firebase 2.0/functions/node_modules/google-auth-library/build/src/auth/googleauth.js:160:19)
> at processTicksAndRejections (internal/process/task_queues.js:97:5)
> at async GoogleAuth.getClient (/home/chahat/Desktop/firebase 2.0/functions/node_modules/google-auth-library/build/src/auth/googleauth.js:502:17)
> at async GrpcClient._getCredentials (/home/chahat/Desktop/firebase 2.0/functions/node_modules/google-gax/build/src/grpc.js:92:24)
> at async GrpcClient.createStub (/home/chahat/Desktop/firebase 2.0/functions/node_modules/google-gax/build/src/grpc.js:213:23)
> (node:6741) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). To terminate the node process on unhandled promise rejection, use the CLI flag `--unhandled-rejections=strict` (see .html#cli_unhandled_rejections_mode). (rejection id: 2)
> (node:6741) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.
⚠ functions: Your function timed out after ~60s. To configure this timeout, see
.
> /usr/lib/node_modules/firebase-tools/lib/emulator/functionsEmulatorRuntime.js:619
> throw new Error("Function timed out.");
> ^
>
> Error: Function timed out.
> at Timeout._onTimeout (/usr/lib/node_modules/firebase-tools/lib/emulator/functionsEmulatorRuntime.js:619:23)
> at listOnTimeout (internal/timers.js:549:17)
> at processTimers (internal/timers.js:492:7)
// ------------ UPDATE --------------------------- //
使用后：
app.get("/home",function(req,res){
db.collection('users').get().then((snapshot)=>{
res.json(snapshot.docs)
});
});
而不是我的上一条原路线，我仍然遇到以下无法理解的错误。错误：
chahat@chahat:~/Desktop/firebase 2.0$ firebase serve --only functions,hosting
⚠ Your requested "node" version "8" doesn't match your global version "12"
✔ functions: functions emulator started at http://localhost:5001
i functions: Watching "/home/chahat/Desktop/firebase 2.0/functions" for Cloud Functions...
i hosting: Serving hosting files from: public
✔ hosting: Local server: http://localhost:5000
⚠ functions: The Cloud Firestore emulator is not running, so calls to Firestore will affect production.
✔ functions[app]: http function initialized (http://localhost:5001/samsungmap-17515/us-central1/app).
⚠ functions: The Cloud Firestore emulator is not running, so calls to Firestore will affect production.
i functions: Beginning execution of "app"
i functions: Finished "app" in ~1s
i functions: Beginning execution of "app"
⚠ External network resource requested!
- URL: "http://169.254.169.254/computeMetadata/v1/instance"
- Be careful, this may be a production service.
⚠ External network resource requested!
- URL: "./computeMetadata/v1/instance"
- Be careful, this may be a production service.
⚠ functions: The Cloud Firestore emulator is not running, so calls to Firestore will affect production.
i functions: Beginning execution of "app"
⚠ External network resource requested!
- URL: "http://169.254.169.254/computeMetadata/v1/instance"
- Be careful, this may be a production service.
⚠ External network resource requested!
- URL: "./computeMetadata/v1/instance"
- Be careful, this may be a production service.
> (node:16552) UnhandledPromiseRejectionWarning: Error: Could not load the default credentials. Browse to for more information.
> at GoogleAuth.getApplicationDefaultAsync (/home/chahat/Desktop/firebase 2.0/functions/node_modules/google-auth-library/build/src/auth/googleauth.js:160:19)
> at processTicksAndRejections (internal/process/task_queues.js:97:5)
> at async GoogleAuth.getClient (/home/chahat/Desktop/firebase 2.0/functions/node_modules/google-auth-library/build/src/auth/googleauth.js:502:17)
> at async GrpcClient._getCredentials (/home/chahat/Desktop/firebase 2.0/functions/node_modules/google-gax/build/src/grpc.js:92:24)
> at async GrpcClient.createStub (/home/chahat/Desktop/firebase 2.0/functions/node_modules/google-gax/build/src/grpc.js:213:23)
> (node:16552) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). To terminate the node process on unhandled promise rejection, use the CLI flag `--unhandled-rejections=strict` (see .html#cli_unhandled_rejections_mode). (rejection id: 2)
> (node:16552) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.
> (node:16583) UnhandledPromiseRejectionWarning: Error: Could not load the default credentials. Browse to for more information.
> at GoogleAuth.getApplicationDefaultAsync (/home/chahat/Desktop/firebase 2.0/functions/node_modules/google-auth-library/build/src/auth/googleauth.js:160:19)
> at processTicksAndRejections (internal/process/task_queues.js:97:5)
> at async GoogleAuth.getClient (/home/chahat/Desktop/firebase 2.0/functions/node_modules/google-auth-library/build/src/auth/googleauth.js:502:17)
> at async GrpcClient._getCredentials (/home/chahat/Desktop/firebase 2.0/functions/node_modules/google-gax/build/src/grpc.js:92:24)
> at async GrpcClient.createStub (/home/chahat/Desktop/firebase 2.0/functions/node_modules/google-gax/build/src/grpc.js:213:23)
> (node:16583) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). To terminate the node process on unhandled promise rejection, use the CLI flag `--unhandled-rejections=strict` (see .html#cli_unhandled_rejections_mode). (rejection id: 2)
> (node:16583) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.
⚠ functions: Your function timed out after ~60s. To configure this timeout, see
.
> /usr/lib/node_modules/firebase-tools/lib/emulator/functionsEmulatorRuntime.js:619
> throw new Error("Function timed out.");
> ^
>
> Error: Function timed out.
> at Timeout._onTimeout (/usr/lib/node_modules/firebase-tools/lib/emulator/functionsEmulatorRuntime.js:619:23)
> at listOnTimeout (internal/timers.js:549:17)
> at processTimers (internal/timers.js:492:7)
请帮助。谢谢
回答如下：如documentation中所述，您需要向客户端发送响应以终止该功能。如果您不发送响应，则该功能将超时。如果您尝试将所有文档寄回，则需要编写如下内容：
app.get("/home",function(req,res){
db.collection('users').get().then((snapshot)=>{
res.json(snapshot.docs)
});
});