Describe the issue/error/question
I would like to send a slack message directly to user using the slack ID with bot token. I’m using a HTTP request node to get the slack Id using - users.lookupByEmail method | Slack
On the slack node, I’m using an expression to retrieve the slack ID from the HTTP node output and insert into the channel. When I execute the workflow I get -
Slack error response: {“ok”:false,“error”:“invalid_arguments”,“response_metadata”:{“messages”:["[ERROR] missing required field: channel"]}}
However, when I manually enter the slack user ID as text into the channel field without any expression, everything works
What is the error message (if any)?
Slack error response: {“ok”:false,“error”:“invalid_arguments”,“response_metadata”:{“messages”:["[ERROR] missing required field: channel"]}}
Please share the workflow
(Select the nodes and use the keyboard shortcuts CMD+C/CTRL+C and CMD+V/CTRL+V to copy and paste the workflow respectively)
Share the output returned by the last node
{
"context": {
},
"name": "NodeOperationError",
"cause": {
},
"timestamp": 1655475418886,
"message": "Slack error response: {"ok":false,"error":"invalid_arguments","response_metadata":{"messages":["[ERROR] missing required field: channel"]}}",
"node": {
"parameters": {
"authentication": "accessToken",
"resource": "message",
"operation": "post",
"channel": "={{$node["HTTP Request"].json["user"]["id"]}}",
"text": "Hello world",
"jsonParameters": false,
"otherOptions": {...}, // 1 keys
"attachments": [...], // 0 items
"blocksUi": {...} // 0 keys
},
"name": "Slack",
"type": "n8n-nodes-base.slack",
"typeVersion": 1,
"position": [
300,
180
],
"credentials": {
"slackApi": {...} // 2 keys
}
}
}
Information on your n8n setup
- n8n version: 0.182.0
- Database you’re using (default: SQLite):
- Running n8n with the execution process [own(default), main]:: own
- Running n8n via [Docker, npm, n8n.cloud, desktop app]:: npm
