[英]ESLint error trying to deploy functions Firebase
I'm try to deploy fireabase example , but when I try to deploy it , CLI launches an error: 我尝试部署fireabase示例,但是当我尝试部署它时,CLI会启动一个错误:
[CODE] [码]
const functions = require('firebase-functions'); //to activate firebase functions
const admin = require('firebase-admin'); //to active firebase database permissions
admin.initializeApp(functions.config().firebase);
exports.addMessage = functions.https.onRequest((req, res) => {
// [END addMessageTrigger]
// Grab the text parameter.
const original = req.query.text;
// [START adminSdkPush]
// Push the new message into the Realtime Database using the Firebase Admin SDK.
admin.database().ref('/messages').push({original: original}).then(snapshot => {
// Redirect with 303 SEE OTHER to the URL of the pushed object in the Firebase console.
res.redirect(303, snapshot.ref);
});
// [END adminSdkPush]
});
[ERROR] [错误]
15:3 error Expected catch() or return promise/catch-or-return
15:69 error Each then() should return a value or throw promise/always-return
✖ 2 problems (2 errors, 0 warnings)
npm ERR! Darwin 17.4.0
npm ERR! argv "/usr/local/bin/node" "/usr/local/bin/npm" "--prefix" "/Users/user/test/functions" "run" "lint"
npm ERR! node v6.10.2
npm ERR! npm v3.10.10
npm ERR! code ELIFECYCLE
npm ERR! functions@ lint: `eslint .`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the functions@ lint script 'eslint .'.
npm ERR! Make sure you have the latest version of node.js and npm installed.
npm ERR! If you do, this is most likely a problem with the functions package,
npm ERR! not with npm itself.
npm ERR! Tell the author that this fails on your system:
npm ERR! eslint .
npm ERR! You can get information on how to open an issue for this project with:
npm ERR! npm bugs functions
npm ERR! Or if that isn't available, you can get their info via:
npm ERR! npm owner ls functions
npm ERR! There is likely additional logging output above.
npm ERR! Please include the following file with any support request:
npm ERR! /Users/eliassebastian/Developer/npm-debug.log
Error: functions predeploy error: Command terminated with non-zero exit code1
I take a look to original final provided by firebase here 我看看原始最终由火力提供这里
I'm to new in Javascript and all this world, so I'm really lost with this type of messages. 我是Javascript和全世界的新手,所以我真的迷失了这种类型的消息。
How can I solve this? 我怎么解决这个问题?
The ESLint warnings are legitimate. ESLint警告是合法的。 To get more detail on each one, you can search them using their unique id.
要获得每个详细信息,您可以使用其唯一ID进行搜索。 For example:
例如:
15:3 error Expected catch() or return promise/catch-or-return
The id of the warning here is promise/catch-or-return
. 这里警告的id是
promise/catch-or-return
。 Googling for "eslint promise/catch-or-return" finds a plugin for ESLint that describes the warning as: 谷歌搜索“eslint promise / catch-or-return”找到一个ESLint插件,它将警告描述为:
Enforces the use of catch() on un-returned promises
强制在未返回的promise上使用catch()
You're getting this because you have a promise being returned from then
, but you never return
or catch
for possible errors. 你得到这个,因为你有一个承诺
then
,但你永远不会return
或catch
可能的错误。
The second warning: 第二个警告:
15:69 error Each then() should return a value or throw promise/always-return
comes from the same ESLint plugin, and is described like this: 来自相同的ESLint插件,并且描述如下:
Return inside each then() to create readable and reusable Promise chains.
返回每个then()以创建可读和可重用的Promise链。
It's requiring you to return a value inside each function called by then
, even if you don't have anything special to sent to the next promise chain. 它要求你在
then
调用的每个函数中返回一个值,即使你没有任何特殊的东西发送到下一个promise链。
You can resolve both of these problems like this: 您可以像这样解决这两个问题:
admin.database().ref('/messages').push({original: original}).then(snapshot => {
res.redirect(303, snapshot.ref);
return null;
}).catch(error => {
console.error(error);
res.error(500);
});
Notice that the then
block returns null now, and catch
is used on the promise returned from then
to capture errors and send an error response to the client. 请注意,
then
块现在返回null,并且catch
用于then
返回的promise以捕获错误并向客户端发送错误响应。
Doug Stevenson answer is partially right as there is one flaw in it. Doug Stevenson的答案部分正确,因为它有一个缺陷。
It should be : 它应该是 :
admin.database().ref('/messages').push({original: original}).then(snapshot => {
res.redirect(303, snapshot.ref);
return 1; // IT SHOULD RETURN NON-NULL VALUE
}).catch(error => {
console.error(error);
res.error(500);
});
The cloud function went into infinite loop when it returned null . 当云函数返回null时,它会进入无限循环 。 And as a result, we can see function timed out after 60,000 ms in the above image.
结果,我们可以看到在上图中60,000 ms后功能超时。
After such multiple timed out functions, you will get the error functions can be executed (shown in above pic). 在这样的多个超时功能之后,您将获得可以执行的错误功能 (如上图所示)。 This is because in Spark Plan (free tier plan), there is limit on CPUMilliSecondsDailyNonbillable .
这是因为在Spark Plan(免费套餐计划)中, CPUMilliSecondsDailyNonbillable有限制。
If you click on Stackdriver's Quota Policy in cloud functions section, you can see the limit in GCD( Google Cloud Platform)
如果您在云功能部分单击Stackdriver的配额策略 ,您可以在GCD(Google云端平台)中查看限制
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