Twilio Programmable Chat REST API response events - node.js

Question

twilioClient.chat.services(service_SID)
.channels
.each(channels => console.log(channels.sid));
From the above code, how can I check if the request is Success or not.
What I tried is :
twilioClient.chat.services(service_SID)
.channels
.each(channels => console.log(channels.sid))
.then(function (err, docs) {
if (err) {
//console.log('error ' + err);
return res.status(500).send('Problem in retrieving channels');
}
res.status(200).json({
message: 'Channels retrieved sucessfully',
docs: docs
});
})
I need something like this to know the response. Did I need to promise?. I dont know about promise yet. Can someone pls provide an example or tutorial.

Answer 1

Twilio developer evangelist here.
When using the each function to map over the remote resource, it's not using a Promise. each expects to work. However, you can provide a function to each that can be called once the request is complete or if there is an error. You can pass that function as the option done in the second argument. Here is how you would do that:
twilioClient.chat.services(service_SID)
.channels
.each((channel => console.log(channel.sid)), { done: error => {
if (error) {
console.error("There was an error loading the channels.", error);
} else {
console.log("All the channels were successfully loaded.")
}
});
If you are looking to load the channels in one go, then each might not be the right function for you. You can also use list which returns the list of channels rather than a channel at a time. For example:
twilioClient.chat.services(service_SID)
.channels
.list({ limit: 50 }, (error, channels) => {
if (error) {
console.error("There was an error loading the channels.", error);
} else {
console.log("Here are your channels: ", channels);
}
});
Let me know if that helps at all.