Node-telegram-bot-api: getChat Error ETELEGRAM: 400 Bad Request: chat_id is empty

[aliir74]

When I use getChat method get this error:

Unhandled rejection Error: ETELEGRAM: 400 Bad Request: chat_id is empty
    at request.then.resp (/root/Documents/saveSampad/SaveSampadBot/node_modules/node-telegram-bot-api/src/telegram.js:280:15)
    at tryCatcher (/root/Documents/saveSampad/SaveSampadBot/node_modules/bluebird/js/release/util.js:16:23)
    at Promise._settlePromiseFromHandler (/root/Documents/saveSampad/SaveSampadBot/node_modules/bluebird/js/release/promise.js:512:31)
    at Promise._settlePromise (/root/Documents/saveSampad/SaveSampadBot/node_modules/bluebird/js/release/promise.js:569:18)
    at Promise._settlePromise0 (/root/Documents/saveSampad/SaveSampadBot/node_modules/bluebird/js/release/promise.js:614:10)
    at Promise._settlePromises (/root/Documents/saveSampad/SaveSampadBot/node_modules/bluebird/js/release/promise.js:693:18)
    at Async._drainQueue (/root/Documents/saveSampad/SaveSampadBot/node_modules/bluebird/js/release/async.js:133:16)
    at Async._drainQueues (/root/Documents/saveSampad/SaveSampadBot/node_modules/bluebird/js/release/async.js:143:10)
    at Immediate.Async.drainQueues (/root/Documents/saveSampad/SaveSampadBot/node_modules/bluebird/js/release/async.js:17:14)
    at runCallback (timers.js:781:20)
    at tryOnImmediate (timers.js:743:5)
    at processImmediate [as _immediateCallback] (timers.js:714:5)

[sidelux]

Remember this syntax:
bot.sendMessage(CHAT_ID_HERE, "Message);

So, can you write here your part of code?

[tyt34]

I try send img in chanel
get chat id => https://api.telegram.org/bot/getUpdates => _"chat":{"id":-1001382271711,_
use code

var chatId = -1001382271711;
a.bot.sendDocument(chatId, 'img.png');

And see erorr => _400 Bad Request: wrong file identifier/HTTP URL specified_
Where I do mistake?

[sidelux]

@tyt34 Maybe you must specify full file path, otherwise use file_id (best choice).
File_id can be retrieved catching message.document.file_id (or message.photo.file_id) on bot.on('message', ...).
Then sendDocument(chatId, file_id).

Anyway try to use as possibile sendPhoto or sendSticker, etc. sendDocument only if you don't know type of file are you sending.

[aliir74]

@sidelux Hi. I use this api to get chat information

bot.getChat(chatId, function(msg) {
  console.log(msg.chat.username)
})

[sidelux]

@aliir74 I think you should use this method.

bot.on('message', function (msg) {
    console.log(msg.from.username);
});

Next save chat_id in database or wherever you like then (in a second moment):

bot.getChat(savedChatId, function(msg) {
    console.log(msg.from.username);
});

[aliir74]

@sidelux I saved chatId before in db and now read from db. but above error occur.

[aliir74]

my entire function code is:

const bot = new TelegramBot(token, {polling: true});
  userModel.find({}, function (err, users) {
    if(!users) {
      return
    }
    for(let i = 0; i < users.length; i++) {
      let chatId = users[i].chatId
      console.log(i, users.length)
      bot.getChat(chatId, function(msg) {
        console.log(i, "done")
        users[i].username = msg.chat.username
        users[i].save()
      })
    }
  })

[sidelux]

@aliir74 Try to print you chat_id in console.log before use getChat, 99% is empty or there is a type error.

[aliir74]

try this solution before and chatId was'nt empty. how to fix type error problem?

[sidelux]

chat_id must be a String, declare chatId = "" before loop or use toString() when assign, maybe js parse it to a number and if it starts with 0 it delete all 0 (or something similar).

[aliir74]

I changed my code to below but same error occurred:

const bot = new TelegramBot(token, {polling: true});
  userModel.find({}, function (err, users) {
    if(!users) {
      return
    }
    for(let i = 0; i < 10; i++) {
      let chatId = users[i].chatId
      console.log(i, chatId)
      bot.getChat(chatId.toString(), function(msg) {
        console.log(i, "done")
        users[i].username = msg.chat.username
        users[i].save()
      })
    }
  })

[sidelux]

Try with this syntax.

bot.getChat(chatId).then(function (msg) {
    // ...
});

[aliir74]

Thanks @sidelux! This worked! But what was problem?

[sidelux]

@aliir74 Honestly i don't know, in my bot i use that syntax with getChatMembersCount and it works, so... btw very good ;)

[tyt34]

I dont know, but in one place code dont work in other place - work.
Shortly speaking - all goods.
Thx.