Session Feedback to Mattermost

Read a session table and post each feedback form to its Mattermost channel.

Setup

Connect Google Sheets in Read all sessions, set the spreadsheet ID and keep the Sessions tab and A:D range or adjust them to cover the whole table. The first row must contain unique Session, Mattermost Channel ID and Feedback Form Link headers. Each data row needs a session name, channel ID and form URL. Connect Mattermost with permission to post in every listed channel.

In n8n, select the Google Sheets and Mattermost credentials, configure the sheet, and activate the workflow. Run one format for each notification schedule.

Behavior

The workflow runs each September 28 at 17:00 UTC. It reads all rows and sends each channel an @channel feedback message naming its session, with a Feedback Form attachment linked to that row’s URL. Empty rows are skipped. Open Flow validates the complete table before sending and returns the processed count; n8n maps the source fields directly.

A failure stops the remaining sends; earlier notices may already exist. Inspect Mattermost before replaying, which can send duplicates. The complete table and messages must fit execution limits. Only people who may receive the form should have access to the configured channels.

Changes to the source

• Replace the personal spreadsheet with setup and set the schedule timezone to UTC.
• Open Flow checks required headers and values before posting; preserve every row, channel and linked attachment.

Adapted from Session feedback notifications in Zie619/n8n-workflows. The source export does not identify a separate template author or license.

The collection’s MIT notice is pinned at a later revision. This is the collection notice at that revision; it does not establish a separate original template author’s license. Our changes are listed above; see repository licensing.

MIT License

Copyright (c) 2025 Zie619

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