This Meteor server failed to fetch the userId inside a method which has been called from a remote DDP.call. How can I get the userId who called the method from a remote DDP? thx
//app 1 server
let app2_Conn = DDP.connect('http://localhost:4000');
Meteor.methods ({
'callOut': () => {
app2_Conn.call('app2_method', args);
}
});
//app 2 server
Meteor.methods ({
'app2_method': () => {
const id = Meteor.userId(); //null
const iD = this.userId; //undefined
}
});
It's because you are using an arrow function. Arrow functions change the way the binding of this works.
Change to:
Meteor.methods({
'app2_method'() {
const id = this.userId;
}
});
Related
So, I have my route which console.logs 'undefined':
router.get("/validate-pin", async (req, res) => {
// restrict when done
try {
const { userId, pin } = req.query;
const isActivePin = await pinsDB.compareActivePin(userId, pin);
console.log(isActivePin)
return res.status(200).json(isActivePin);
} catch (error) {
console.log(error);
res.status(500).json({ error: "db error: ", error });
}
});
I have my compareActivePin method, which logs out the 'res' parameter, but for some reason doesn't return it:
async function compareActivePin(userId, received_pin) {
const active_pin = await db("account_pins").where({ userId, isActive: true });
const pinIsValidated = bcrypt.compareSync(
received_pin,
active_pin[0].account_pin
);
if (pinIsValidated) {
let skLocation = await db("sks").where({ userId }).select("url");
await readKey(skLocation[0].url, (res) => {
// console.log(res);
return res;
});
} else return false;
}
And I have my readKey method, which actually grabs the data I want my compareActivePin to return. This works like a charm.
const readKey = async (key, callback) => {
const aws = require("aws-sdk");
aws.config.update({
secretAccessKey: process.env.AWS_SECRET_ACCESS_KEY,
accessKeyId: process.env.AWS_ACCESS_KEY_ID,
region: "us-east-2",
});
const s3 = new aws.S3();
const getParams = { Bucket: process.env.SK_BUCKET, Key: `${key}.txt` };
await s3.getObject(getParams, (err, data) => {
if (err) return err;
return callback(data.Body.toString());
});
};
So, just to recap. When I hit my endpoint, I pass in a userId and pin (strings). This calls the compareActivePin method which validates the pin and then, if the pin is valid, it then calls readKey, which grabs the file from S3 and returns the text within the file.
Like I said, I'm able to log it out to the console from within the readKey callback, but when I try to log it out as the returned value from the route, it comes back undefined.
Hoping someone could point me in the right direction.
Thanks...
I ended up answering my own question. I don't think it's possible to get a return value from the callback, so I ended up paring down the call from the database and sending the response from the readKey function using the router response object, like so:
//CompareActivePin Function
async function compareActivePin(userId, received_pin) {
const active_pin = await db("account_pins").where({ userId, isActive: true });
const pinIsValidated = bcrypt.compareSync(
received_pin,
active_pin[0].account_pin
);
return pinIsValidated;
}
//Router Call
router.get("/validate-pin", async (req, res) => {
// restrict when done
try {
const { userId, pin } = req.query;
const isActivePin = await pinsDB.compareActivePin(userId, pin);
if (isActivePin) {
let skLocation = await skDB.findUrl(userId);
readKeyFunc(skLocation[0].url, (result) => {
return res.status(200).json({ confirmed: isActivePin, key: result });
});
} else return res.status(401).json({ confirmed: isActivePin, key: null });
} catch (error) {
res.status(500).json({ error: "db error: ", error });
}
});
This also goes a long way toward keeping my database methods pure and separating my concerns.
Thanks, StackOverflow!
When I'm try to getUserProfile() I receive that typeError that dispatch is not a function
Unhandled Runtime Error
Error: Actions must be plain objects. Use custom middleware for async actions.
export const fetchUserProfile = (userData) => ({
type: types.GET_USER_PROFILE,
userData,
});
//thunk
export const loginUser = (credentials) => async (dispatch) => {
dispatch(loginRequest(credentials));
try {
const userToken = await userService.login(credentials);
await dispatch(loginSuccess(userToken));
getUserProfile();
} catch (error) {
const message = await errorMessage(
error,
"There was a problem processing your request"
);
dispatch(loginFailure(message));
}
};
export const getUserProfile = async (dispatch) => {
try {
const profileData = await userService.getProfileData();
dispatch(fetchUserProfile(profileData));
} catch (e) {
console.log(e);
return [];
}
};
You need to dispatch all thunks, replace
getUserProfile();
with
dispatch(getUserProfile())
Your getUserProfile should be a function that accepts its own arguments when you dispatch it, and then it can either be a callback function that accepts dispatch as an argument (this comes from the Redux Thunk middleware) and then that function has functions that return action objects, OR it can just be a function that returns an action object directly (confusing, I know, but you actually did it correctly for your loginUser action):
export const getUserProfile = () => async (dispatch) => {
try {
const profileData = await userService.getProfileData();
dispatch(fetchUserProfile(profileData));
} catch (e) {
console.log(e);
return []; // this shouldn’t be returning an empty array, if anything it should be dispatching an action for errors that can be displayed to the user
}
};
This overly simple example kind of gives you an idea of what's happening (click Run code snippet):
// the "dispatch" function that would come from
// the Redux Thunk middleware
const dispatch = (action) => action((args) => console.log("dispatch:", JSON.stringify(args, null, 2)));
// a "setUserProfile" action that returns an object
const setUserProfile = (payload) => ({
type: "SET_PROFILE",
payload
});
// a "fetchUserProfile" action that returns an object
const fetchUserProfile = () => ({ type: "FETCH_USER" });
// a "showError" action that returns an object
const showError = error => ({ type: "FETCH_USER/ERROR", payload: error });
// while the "getUserProfile" action doesn't have any arguments of
// its own, it accepts a "dispatch" callback function as the SECOND
// set of arguments, then other actions are dispatched (which return
// their own objects)
const getUserProfile = () => async(dispatch) => {
try {
// dispatches the "fetchUserProfile" action
// which just returns: { type: "FETCH_USER" }
dispatch(fetchUserProfile());
// fetching data from API
const res = await fetch("https://jsonplaceholder.typicode.com/users/1");
const data = await res.json();
// dispatches the "setUserProfile" with data from API
// which returns: { type: "SET_PROFILE", payload: data }
dispatch(setUserProfile(data));
} catch (e) {
console.log(e);
dispatch(showError(e.message));
}
};
// dispatching the "getUserProfile" function above
// optionally, you can add arguments here, but then these would be
// a part of the FIRST set of arguments to the function
dispatch(getUserProfile());
<script src="https://cdnjs.cloudflare.com/ajax/libs/babel-standalone/6.26.0/babel.min.js"></script>
I'm trying to use some data from from Firestore. before it used to work, now in Vuetify I keep getting 'PENDING' if I try to access the $data.users
export default {
data() {
return {
users: [],
};
},
created() {
db.collection('users').get().then((snapshot) => {
snapshot.forEach((doc) => {
const user = doc.data();
user.id = doc.id;
this.users = user;
console.log(user.documents.selfie.url); // Here the log return the value correctly
});
});
},
methods: {
imageUrl(user) {
console.log(user.documents.selfie.url); // Here the log return "Pending";
},
Inside the template I run a v-for (user, index) in users :key='index'
ERROR:
Uncaught (in promise) TypeError: Cannot read property 'selfie' of undefined
It's difficult to be 100% sure without reproducing your problem, but I think the problem comes from the fact that the Promise returned by the asynchronous get() method is not yet fulfilled when you call the imageUrl() method. This is why you get the pending value.
One possibility to solve that is to check as follows:
methods: {
imageUrl(user) {
if (user) {
console.log(user.documents.selfie.url);
} else {
//...
}
},
Also, is seems you want to populate the users Array with the docs from the users collection. You should do as follows:
created() {
db.collection('users').get().then((snapshot) => {
let usersArray = [];
snapshot.forEach((doc) => {
const user = doc.data();
user.id = doc.id;
usersArray.push(user);
console.log(user.documents.selfie.url); // Here the log return the value correctly
});
this.users = usersArray;
});
},
With your current code you assign the last user in the loop, not the list of users.
I would like to call an asynchronous function outside the lambda handler with by the following code:
var client;
(async () => {
var result = await initSecrets("MyWebApi");
var secret = JSON.parse(result.Payload);
client= new MyWebApiClient(secret.API_KEY, secret.API_SECRET);
});
async function initSecrets(secretName) {
var input = {
"secretName" : secretName
};
var result = await lambda.invoke({
FunctionName: 'getSecrets',
InvocationType: "RequestResponse",
Payload: JSON.stringify(input)
}).promise();
return result;
}
exports.handler = async function (event, context) {
var myReq = await client('Request');
console.log(myReq);
};
The 'client' does not get initialized. The same code works perfectly if executed within the handler.
initSecrets contains a lambda invocation of getSecrets() which calls the AWS SecretsManager
Has anyone an idea how asynchronous functions can be properly called for initialization purpose outside the handler?
Thank you very much for your support.
I ran into a similar issue trying to get next-js to work with aws-serverless-express.
I fixed it by doing the below (using typescript so just ignore the :any type bits)
const appModule = require('./App');
let server: any = undefined;
appModule.then((expressApp: any) => {
server = createServer(expressApp, null, binaryMimeTypes);
});
function waitForServer(event: any, context: any){
setImmediate(() => {
if(!server){
waitForServer(event, context);
}else{
proxy(server, event, context);
}
});
}
exports.handler = (event: any, context: any) => {
if(server){
proxy(server, event, context);
}else{
waitForServer(event, context);
}
}
So for your code maybe something like
var client = undefined;
initSecrets("MyWebApi").then(result => {
var secret = JSON.parse(result.Payload);
client= new MyWebApiClient(secret.API_KEY, secret.API_SECRET)
})
function waitForClient(){
setImmediate(() => {
if(!client ){
waitForClient();
}else{
client('Request')
}
});
}
exports.handler = async function (event, context) {
if(client){
client('Request')
}else{
waitForClient(event, context);
}
};
client is being called before it has initialised; the client var is being "exported" (and called) before the async function would have completed. When you are calling await client() the client would still be undefined.
edit, try something like this
var client = async which => {
var result = await initSecrets("MyWebApi");
var secret = JSON.parse(result.Payload);
let api = new MyWebApiClient(secret.API_KEY, secret.API_SECRET);
return api(which) // assuming api class is returning a promise
}
async function initSecrets(secretName) {
var input = {
"secretName" : secretName
};
var result = await lambda.invoke({
FunctionName: 'getSecrets',
InvocationType: "RequestResponse",
Payload: JSON.stringify(input)
}).promise();
return result;
}
exports.handler = async function (event, context) {
var myReq = await client('Request');
console.log(myReq);
};
This can be also be solved with async/await give Node v8+
You can load your configuration in a module like so...
const fetch = require('node-fetch');
module.exports = async () => {
const config = await fetch('https://cdn.jsdelivr.net/gh/GEOLYTIX/public/z2.json');
return await config.json();
}
Then declare a _config outside the handler by require / executing the config module. Your handler must be an async function. _config will be a promise at first which you must await to resolve into the configuration object.
const _config = require('./config')();
module.exports = async (req, res) => {
const config = await _config;
res.send(config);
}
Ideally you want your initialization code to run during the initialization phase and not the invocation phase of the lambda to minimize cold start times. Synchronous code at module level runs at initialization time and AWS recently added top level await support in node14 and newer lambdas: https://aws.amazon.com/blogs/compute/using-node-js-es-modules-and-top-level-await-in-aws-lambda/ . Using this you can make the init phase wait for your async initialization code by using top level await like so:
const sleep = ms => new Promise(resolve => setTimeout(resolve, ms))
console.log("start init");
await sleep(1000);
console.log("end init");
export const handler = async (event) => {
return {
statusCode: 200,
body: JSON.stringify('Hello from Lambda!'),
};
};
This works great if you are using ES modules. If for some reason you are stuck using commonjs (e.g. because your tooling like jest or ts-node doesn't yet fully support ES modules) then you can make your commonjs module look like an es module by making it export a Promise that waits on your initialization rather than exporting an object. Like so:
const sleep = ms => new Promise(resolve => setTimeout(resolve, ms))
const main = async () => {
console.log("start init");
await sleep(1000);
console.log("end init");
const handler = async (event) => {
return {
statusCode: 200,
body: JSON.stringify('Hello from Lambda!'),
};
};
return { handler };
};
# note we aren't exporting main here, but rather the result
# of calling main() which is a promise resolving to {handler}:
module.exports = main();
The following is what I am trying to do:
var joinNetwork = function (obj) {
Meteor.call("joinNetwork", {
userId: obj.userId,
domain: obj.domain
}, function (err, networkId) {
return networkId;
});
}
Accounts.onCreateUser(function (options, user) {
var userId = user._id;
var email = options.email;
var domain = Utils.getDomain(email);
var joinNetworkSync = Meteor.wrapAsync(joinNetwork);
// works fine until here
var networkId = joinNetworkSync({
userId: userId,
domain: domain
});
// never get here
debugger
As you can see, after I call joinNetworkSync I never reach the code after it. In other words, networkId is never available. What am I doing wrong?
To return from a wrapAsync you have to call a callback passed to that function:
Meteor.wrapAsync(function (obj, done) {
Meteor.call("joinNetwork", {
userId: obj.userId,
domain: obj.domain
}, function (err, networkId) {
done(networkId);
});
})
You don't need wrap async here dough. When you call meteor methods server side, they return like normal functions. You can just do this if the joinNetwork method is properly defined:
Accounts.onCreateUser(function (options, user) {
var userId = user._id;
var email = options.email;
var domain = Utils.getDomain(email);
var networkId = Meteor.call("joinNetwork", {
userId: obj.userId,
domain: obj.domain
});
...
})
I think your sync version of joinNetwork is not returning anything. You placed a return inside another function, the callback of joinNetwork. Try splitting the next part up in another function and call that inside the callback function using the networkId.