I am making a call to an API and the response is somehow what I expect. However, I want to count the number of elements returned and I can not do it. This is what I think is important from the code.
Call in Vue component
data(){
return {
messages: {}
}
},
loadMessages(){
axios.get("api/messagesmenu")
.then((data) => { this.messages = data.data})
}
Api controller
public function index(){
$messages = Message::all()->where('read_at', NULL);
if(isset($messages)){
foreach($messages as $message){
$from = User::find($message->from_id);
$message->fromPrenom = $from->first_name;
$message->fromNom = $from->last_name;
$message->fromImage = $from->user_image;
}
}else{
$messages = [];
}
return $messages;
}
Type of response from the API
{"3":{"id":560,"from_id":2,"to_id":1,"content":"tgr","created_at":"2019-07-15 16:59:03","read_at":null,"fromPrenom":"abdel1","fromNom":"Hidalgo","fromImage":"user2-160x160.png"}}
I want to count the number of objects I obtain. if (in vue component) I do
this.messages.length
it returns undefined
Try this:
const messages = {"3":{"id":560,"from_id":2,"to_id":1,"content":"tgr","created_at":"2019-07-15 16:59:03","read_at":null,"fromPrenom":"abdel1","fromNom":"Hidalgo","fromImage":"user2-160x160.png"}}
console.log(Object.keys(messages).length) // 1
Or in your code:
...
.then((data) => {
this.messages = data.data
console.log(Object.keys(this.messages).length)
})
Related
#wire(_getContacts,{recordId:'$recordId'}) wiredContacts({error,data}){
this.dataToRefresh = data;
if (data) {
this.contacts = this.dataToRefresh.recordList;
this.ContactsRecords = this.dataToRefresh.cList;
this.contactsSize = " Case Contacts (" + this.contacts.length + ")";
}else{
//
}
};
relateContacts() {
this.showSpinner = true;
this.showtable=false;
relateContacts({contacts: this.selected, recordId: this.recordId})
.then(data => {
this.showSpinner=false;
this.showtable=true;
this.showSuccessMessage();
refreshApex(this.dataToRefresh);
//location.reload();
this.isShowModal = false;
})
.catch(error => {
console.log(error);
this.showSpinner=false;
const evt = new ShowToastEvent({
title: 'Application Error',
message: error.body.message,
variant: 'error',
mode: 'sticky'
});
this.dispatchEvent(evt);
this.showSpinner = false;
});
}
For this code, I tried refreshApex with all possible ways. but I'm not sure the miss here. I've Checked all the blogs but everywhere, the solution is mentioned.
Tried refreshApex like below :
#wire(_getContacts,{recordId:'$recordId'}) wiredContacts({data}){
this.dataToRefresh = data;
But this also does not work
Ah that is a fun one ! Your issue is using destructuring in wiredContacts as the parameter.
(The {data} or {data,error} normally works as a parameter to the function being called back, except if you have to do refresh) Try this instead.
#wire(_getContacts,{recordId:'$recordId'}) wiredContacts(value){
this.dataToRefresh = value;
const {data, error} = value;
//Rest of you code now with data and error
}
Then in your other method you can do:
method(){
refreshApex(this.dataToRefresh);
}
Salesforce does show doing this in their example code, but it’s easy to miss and experience the fun you have been having with this.
https://developer.salesforce.com/docs/component-library/documentation/en/lwc/lwc.apex_result_caching
See the last example on their page.
I have a vue function call which is triggered when selecting a radio button but it seems that my code inside my $nextTick is running before my previous line of code is finished. I don't want to use setTimout as I don't know how fast the user connection speed is.
findOrderer() {
axios.post('/MY/ENDPOINT')
.then((response) => {
this.orderers = response.data.accounts;
console.log('FIND_ORDER', this.orderers)
...OTHER_CODE
}
rbSelected(value) {
this.findOrderer();
this.newOrderList = [];
this.$nextTick(() => {
for (var i = 0, length = this.orderers.length; i < length; i++) {
console.log('FOR')
if (value.srcElement.value === this.orderers[i].accountType) {
console.log('IF')
this.newOrderList.push(this.orderers[i]);
}
}
this.$nextTick(() => {
this.orderers = [];
this.orderers = this.newOrderList;
console.log('orderers',this.orderers)
})
})
}
Looking at the console log the 'FINE_ORDERER' console.log is inside the 'findOrderer' function call so I would have expected this to be on top or am I miss using the $nextTick
That's expected, since findOrderer() contains asynchronous code. An easy way is to simply return the promise from the method, and then await it instead of waiting for next tick:
findOrderer() {
return axios.post('/MY/ENDPOINT')
.then((response) => {
this.orderers = response.data.accounts;
console.log('FIND_ORDER', this.orderers);
});
},
rbSelected: async function(value) {
// Wait for async operation to complete first!
await this.findOrderer();
this.newOrderList = [];
for (var i = 0, length = this.orderers.length; i < length; i++) {
console.log('FOR')
if (value.srcElement.value === this.orderers[i].accountType) {
console.log('IF')
this.newOrderList.push(this.orderers[i]);
}
}
this.orderers = [];
this.orderers = this.newOrderList;
console.log('orderers',this.orderers)
}
The below code i use for doing multiple HTTP calls depending on the studentList.
It works well; however, I think the axios spread is not necessary
export default {
getFee (studentList: { studentId: string }[]) {
if (studentList.length < 1) {
Promise.resolve()
}
let promises = []
for (const student of studentList) {
if (!student.studentId) {
Promise.resolve()
}
var url = `${API_URL}/${student.studentId}`
promises.push(Axios.get(url))
}
return Axios.all(promises)
.then(Axios.spread((...args) => {
// customise the response here
return args
.map(response => response.data)
.map(data => {
// #ts-ignore
data.totalMark = data.markinPhysics + data.markinMaths + data.markinChemistry // total mark sum of marks in differnet discplines
return data
})
}))
.catch(error => {
switch (error.response.status) {
case 400:
console.log('student not found')
break
case 500:
console.log('error invoking')
break
default:
console.log('unknown error')
I have to do multiple network calls in Vue and I am using Axios.
I got it working by axios, all and axios.spread, but I think the code can be improved.
The logic is to do multiple calls for the student list and get the outputs back
Can anyone help?
Axios.all
as well as Promise.all accepts array of promises and returns a new Promise which is resolved whenever all of the given promises are resolved with an array with the result of each promise
e.g.
const promise1 = Promise.resolve('data1');
const promise2 = Promise.resolve('data2');
Promise.all([
promise1,
promise2,
]).then(results => {
// results is an array with 2 elements
console.log(results[0]); // data1
console.log(results[1]); // data2
});
you can use Axios.spread to to assign each result to a variable like this:
Promise.all([
promise1,
promise2,
]).then(Axios.spread(( result1, result2 ) => {
// args is an array with 2 elements
console.log(result1); // data1
console.log(result2); // data2
});
alternatively you can use ES6 Destructuring assignment:
Promise.all([
promise1,
promise2,
]).then(([ result1, result2 ]) => {
// args is an array with 2 elements
console.log(result1); // data1
console.log(result2); // data2
});
Unnecessary Promise.resolve()
Your Promise.resolve() function calls have no effect on the getFee method since you're not returning them
What would my implementation be
async function getFee(studentList) {
try {
const promises = studentList.reduce((acc, student) =>
student.studentId
? acc.concat(Axios.get(`${API_URL}/${student.studentId}`))
: acc
, []);
const responses = await Axios.all(promises);
return responses
.map(response => response.data)
.map(data => ({
// return new object
// with data's properties
// instead of assinging the new ones directly to the data
...data,
// total mark sum of marks in differnet discplines
totalMark: data.markinPhysics + data.markinMaths + data.markinChemistry,
}));
} catch (error) {
switch (error.response.status) {
case 400:
console.log("student not found");
break;
case 500:
console.log("error invoking");
break;
default:
console.log("unknown error");
}
}
}
export default {
getFee
}
Since you're only using args as an array, you could remove axios.spread.
axios.spread() might only be useful in older browsers now that ES2015 introduced its own spread operator. The main purpose of axios.spread() is to expand the result of axios.all() into an argument list, such that you could do:
axios.all(promiseArray).then(axios.spread(function(arg1, arg2, arg3) {
/*...*/
}))
instead of:
axios.all(promiseArray).then(function(args) {
var arg1 = args[0]
var arg2 = args[1]
var arg3 = args[2]
/*...*/
})
ES2015's rest operator does the inverse of axios.spread(), so when you combine them (as seen below), you end up with the result above, as if axios.spread() and the rest operator weren't even used:
axios.all(promiseArray).then(axios.spread(function(...args) {
var arg1 = args[0]
var arg2 = args[1]
var arg3 = args[2]
/*...*/
}))
// or newer syntax:
axios.all(promiseArray).then(axios.spread((...args) => {
const arg1 = args[0]
const arg2 = args[1]
const arg3 = args[2]
/*...*/
}))
To avoid promise chaining and improve readability, I think below can be used.
const [arg1, arg2] = await Promise.all(promises)
I'm trying to get some data from a Promise_ object, in React Native app, in my AsyncStorage.
This is what I get in the console, in my Promise_ object :
Promise {_40: 0, _65: 0, _55: null, _72: null}
_40: 0
_55: {imageId: "1", imageName: "test.png"}
_65: 1
_72: null
__proto__: Object
So I don't know how to simply get the data in the _55 and show them in my code, I just want to take "1" and "test.png".
And sorry for my bad english. Thanks !
CODE :
This is the code for the set :
export const setBadgePicture = async (badgePictureId, badgePictureName) => await AsyncStorage.multiSet([['imageId', badgePictureId],['imageName', badgePictureName]])
and for the get :
export const getBadgePicture = async () => { await AsyncStorage.multiGet(['imageId', 'imageName']).then((response) => { tableResponse = { 'imageId' : response[0][1], 'imageName' : response[1][1], } }) return tableResponse }
you can do this to wait until your AsyncStorage returns the item.
AsyncStorage.getItem('YOUR_KEY').then((response)=>{
const itemVal = response;
})
AsyncStorage getItem function is an Asynchronous function. That means that if you want to get the return of that "get" function you will have to wait for the response. if you are using AsyncStorage.getItem() function add the reserved word await before the statement and in the function you are calling it put the reserved word async like this way:
async myFunctionWhereImCallingTheGetter () {
var myData = await AsyncStorage.getItem('theitemIamSearching');
}
Try then that:
export const getBadgePicture = async () => {
var response = await AsyncStorage.multiGet(['imageId', 'imageName']);
var tableResponse = { 'imageId' : response[0][1], 'imageName' : response[1][1], } });
return tableResponse;
}
What if you avoid multiGet?
export const getBadgePicture = async () => {
var imageId = await AsyncStorage.getItem('imageId');
var imageName = await AsyncStorage.getItem('imageName');
var tableResponse = { 'imageId' : imageId, 'imageName' : imageName };
return tableResponse;
}
I have a JS Array of Objects which, at time of Post contains three variables per object:
ParticipantId,
Answer,
ScenarioId
During post, there is an Array the size of 8 (at current anyway) which all correctly contain data. When I call post request, the Controller does get hit as the breakpoint triggers, the issue is when I view the List<SurveyResponse> participantScenarios it is shown as having 0 values.
The thing I always struggle to understand is that magic communication and transform between JS and .Net so I am struggling to see where it is going wrong.
My JS Call:
postResponse: function () {
var data = JSON.stringify({ participantScenarios: this.scenarioResponses})
// POST /someUrl
this.$http.post('ScenariosVue/PostScenarioChoices', data).then(response => {
// success callback
}, response => {
// error callback
});
}
My .Net Core Controller
[HttpPost("PostScenarioChoices")]
public async Task<ActionResult> PostScenarioChoices(List<SurveyResponse> participantScenarios)
{
List<ParticipantScenarios> addParticipantScenarios = new List<ParticipantScenarios>();
foreach(var result in participantScenarios)
{
bool temp = false;
if(result.Answer == 1)
{
temp = true;
}
else if (result.Answer == 0)
{
temp = false;
}
else
{
return StatusCode(400);
}
addParticipantScenarios.Add(new ParticipantScenarios
{
ParticipantId = result.ParticipantId,
Answer = temp,
ScenarioId = result.ScenarioId
});
}
try
{
await _context.ParticipantScenarios.AddRangeAsync(addParticipantScenarios);
await _context.SaveChangesAsync();
return StatusCode(201);
}
catch
{
return StatusCode(400);
}
}