Passing array or nested objects in body of request npm - node.js

Question

I have to send some parameters of String type along with one array in my body.
But it throws me an error message:
First argument must be String or buffer
Here is my code:
var tokenList = JSON.parse(req.body.tokenList);
var mobParams = {
"tokens": tokenList,
"profile": "<myprofile>",
"notification": {
"title": req.body.title,
"message": req.body.text
}
};
request({
method: "POST",
url: 'https://api.ionic.io/push/notifications',
headers: {
"content-type": "application/json",
"authorization": "Bearer ********"
},
body: (mobParams)
}, function(error, response, body){
console.log('Ionic push error', error);
console.log('IOnic push res', response);
console.log('IOnic push body', body);
if(!error){
return res.send({
code: 1,
message: "success"
});
}else{
return res.send({
code: 0,
message: error
});
}
How can I pass my array inside this object to request npm?
Also, I would like to add that this implementation works pretty fine through front-end but I have separate codebase which requires me to hit multiple FCM requests i.e. in a loop. So I would be happy to have a solution as neither ionic push nor FCM push works
For the FCM push I am trying the code below :
let desktopParams = {
"notification": {
"title": 'Merchant Portal Notifications',
"body": req.body.text
// "click_action" : action
},
"to": '/topics/' + topic
};
request({
method: "POST",
json: true,
url: 'https://fcm.googleapis.com/fcm/send',
headers: {
"content-type": "application/json",
"authorization": "key=****"
},
body: desktopParams
}, function(error, response, body){
console.log('error', error);
console.log('response', response);
console.log('body', body);
//return body;
});

Answer 1

you should try stringifying your tokenList & req.body.text before you join it with with the string (try to log it and post the outcome so that people will have a better idea about the objects...):
var cho = [{name:'john',lname:'cena'},{name:'mary',lname:'jane'}];
var che = {list:[{name:'john',lname:'cena'},{name:'mary',lname:'jane'}],group:'people'}
var mobParams = {
"tokens":JSON.parse(JSON.stringify(cho)),
"profile": "<myprofile>",
"notification": {
"title": "Some title",
"message":JSON.parse(JSON.stringify(che))
}
};
console.log(JSON.stringify(mobParams));//----->{"tokens":[{"name":"john","lname":"cena"},{"name":"mary","lname":"jane"}],"profile":"<myprofile>","notification":{"title":"Some title","message":{"list":[{"name":"john","lname":"cena"},{"name":"mary","lname":"jane"}],"group":"people"}}}
var arr = [{name:'john',lname:'cena'},{name:'mary',lname:'jane'}]
var js = JSON.stringify(arr);
var blabla = {'item':'something',js}
console.log(blabla); //-----> Object {item: "something", js: "[{"name":"john","lname":"cena"},{"name":"mary","lname":"jane"}]"}
var js = JSON.parse(JSON.stringify(arr));
var blabla = {'item':'something',js}
console.log(blabla); //-----> Object {item: "something", js: Array(2)}
var js = JSON.parse(arr);
var blabla = {'item':'something',js}
console.log(blabla); //-----> "SyntaxError: Unexpected identifier"