Need help with "sendmediagroup" telegram

[STYONED]

hey, I looked at this topic.

Dynamically send variable groups of media on Telegram with n8n

Hi everyone, I’m currently working on a workflow for a Telegram bot, and I need some advice on whether my approach is correct and how to simplify things. What I’m trying to achieve: My Telegram bot receives groups of media (between 1 and 10 files) composed of a mix of photos and videos. These groups may be compressed or uncompressed. I save the media_id and media_type for each file in a MySQL database because some files exceed the download limits of Telegram’s API, and I only need to forward…

I integrated his solution into my workflow, everything worked, photos are sent by album, but the data is duplicated and two messages with the same data arrive.

• n8n version:1.102.3
• Database ():Airtable
• n8n EXECUTIONS_PROCESS setting (default: own, main):default
• Running n8n via (Docker, npm, n8n cloud, desktop app):n8n cloud
• Operating system:win11

[Erick_Torres]

The most reliable solution, used by several users successfully:

Don’t use the “Send Media Group” node.
Use an HTTP Request to the Telegram API: Endpoint: sendMediaGroup, JSON with a variable media array.
You can iterate over the media_ids retrieved from the database and dynamically build the array.

This approach allows you to send any combination of photos/videos, without duplicates and with proper programmatic logic.

You should also build a dynamic array, with a code node such as:

return [
{
json: {
chat_id: ,
media: items.map(item => ({
type: item.json.media_type, // “photo” or “video”
media: item.json.media_id
}))
}
}
];

Then pass this. This JSON will be passed to the HTTP Request node.

Send with HTTP Request
Configure:
URL: https://api.telegram.org/bot<YOUR_TOKEN>/sendMediaGroup
Method: POST
Body: Use the generated JSON as JSON/RAW Body
This allows variable albums to be sent correctly.

[STYONED]

thanks for the reply, I’m already using an http request from senmediagroup. It turns out that each attached copper to the message initializes a new startup of the workflow, and each node is executed several times, maybe I made a mistake somewhere during the setup?

[STYONED]

// items[] —
const media = items.map(i => ({
  type:    i.json.fields.type,
  media:   i.json.fields.file_id,
  caption: i.json.fields.caption || ''
}));

const uniq = [];
const seen = new Set();
for (const m of media) {
  if (!seen.has(m.media)) {
    uniq.push(m);
    seen.add(m.media);
  }
}
return [{
  json: {
    media: JSON.stringify(uniq), 
    ids:   items.map(i => i.json.id)
  }
}];

this is my code for build array

[cutecatcode]

items already deprecated since in the new version, you must use $input.all() instead.
so replace the 2nd line from items.map to $input.all().map() vice versa for the ids at line 19, you need to change it to $input.all().map(i=>i.json.id)

[STYONED]

thanks for the reply, I did everything as you wrote, but the media was duplicated anyway.

[Erick_Torres]

You must dynamically build a JSON array with the media to send:

return [
{
json: {
chat_id: ...,
media: items.map(i => ({
type: i.json.media_type, // “photo” or “video”
media: i.json.media_id,
caption: i.json.caption || ''
}))
}
}
];

Then send this payload using a configured HTTP Request node:

• URL: https://api.telegram.org/bot<YOUR_TOKEN>/sendMediaGroup
• Method: POST
• Body: JSON content resulting from the previous code

This allows you to send albums with any combination or number of files without duplication or fixed limits

[STYONED]

@Erick_Torres

return [
{
json: {
chat_id: ...,
media: items.map(i => ({
type: i.json.media_type, // “photo” or “video”
media: i.json.media_id,
caption: i.json.caption || ''
}))
}
}
];

this code doesn’t seem to work for me

here is the one i made:

const TARGET_CHAT_ID = '-1002865103306';   


const media = $input.all().map(i => {
  const j = i.json;

 
  const type =
    j.type ? j.type :
    j.mimeType?.startsWith('video') ? 'video' :
    'photo';

  return {
    type,              
    media:   j.file_id, 
    caption: j.caption || ''
  };
});


const uniq = [];
const seen = new Set();
for (const m of media) {
  if (!seen.has(m.media)) {
    uniq.push(m);
    seen.add(m.media);
  }
}

const recIds = $input.all().map(i => i.json.id);

return [
  {
    json: {
      chat_id: TARGET_CHAT_ID,
      media:   JSON.stringify(uniq),
      ids:     recIds 
    }
  }
];

Still sends duplicate files to target chat
Maybe I’m doing something wrong?