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Notify Redmine project members in Slack about teammates’ approved Odoo leave

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Notify Redmine project members in Slack about teammates’ approved Odoo leave preview
Open on n8n.io

Important notice

This workflow is provided as-is. Please review and test before using in production.

1. Workflow Overview

Who is this for? This workflow is designed for engineering teams, project managers, and IT operations who need consistent visibility into team availability across multiple projects. It’s perfect ...

Best for

  • Project Management automation workflows
  • advanced n8n builders looking for reusable templates

Tools used

n8n-nodes-base.set, n8n-nodes-base.scheduletrigger, n8n-nodes-base.code, n8n-nodes-base.httprequest, n8n-nodes-base.noop, n8n-nodes-base.executeworkflowtrigger, n8n-nodes-base.splitinbatches, n8n-nodes-base.wait

Source and attribution

This workflow is cataloged by N8N Workflows and links back to its original n8n.io source page by BHSoft.

Original n8n.io source

1.1 Workflow description

Title
Notify Redmine project members in Slack about teammates’ approved Odoo leave
Workflow name
Notify Redmine project members in Slack about teammates’ approved Odoo leave

📌Who is this for?

This workflow is designed for engineering teams, project managers, and IT operations who need consistent visibility into team availability across multiple projects. It’s perfect for organizations that use Odoo for leave management and Redmine for project collaboration, and want to ensure that everyone involved gets timely, automated Slack notifications whenever a team member will be absent the next day.

📌The problem

When team members go dark, everything grinds to a halt. You're stuck with:

  • Last-minute meeting reschedules (and frustrated stakeholders)
  • Tasks assigned to people who aren't there
  • No time to redistribute workload
  • Bottlenecks affecting multiple projects

📌How it works

  1. Runs daily at 17:15 - Set it and forget it. Executes every afternoon, giving teams time to prepare.
  2. Fetches Tomorrow's Approved Leaves from Odoo - Pulls all leave records with tomorrow's start date and "approved" status.
  3. Maps Employee & Project Data - Grabs the employee's details and identifies every Redmine project they're assigned to.
  4. Finds All Teammates on the Same Projects - Deduplicates across overlapping projects to avoid notification spam.
  5. Sends Targeted Slack Notifications - Only notifies people who actually work with the absent member, plus optional manager alerts.

📌Quick setup

Before you start, you’ll need:

  • Odoo API key
  • Redmine API key
  • Slack Bot Token (or Incoming Webhook URL)
  • Subflows need to be created within a new flow; the main flow will call these subflows.

📌Results

What changes immediately:

  • Zero surprises - teams know absences 24 hours ahead
  • Workload rebalancing happens before the person goes off
  • Managers make proactive decisions, not reactive ones
  • No more wasted Slack messages to irrelevant people
  • This creates a more predictable and transparent workflow across your engineering and project teams.

📌Take it further

Ready to supercharge it? Add:

  • Auto-assign backup owners for critical tasks
  • Sync absences to Google Calendar/Outlook
  • Log notifications to a database for auditing
  • Conditional alerts (key roles, high-priority projects only)
  • Daily summary digest of all upcoming absences

📌Need help customizing?

Contact me for consulting and support: Linkedin / Website

1.2 Logical Blocks

This catalog entry is organized from the workflow JSON. The node-level section below shows the executable blocks available for review before importing the template.

2. Block-by-Block Analysis

Block 1 - Step2: Set Variables

Type / Role
n8n-nodes-base.set - set
Config choices
Version 3.4

Block 2 - Step 1: Schedule the trigger to run every weekday at 5:15 PM.

Type / Role
n8n-nodes-base.scheduleTrigger - scheduleTrigger
Config choices
Version 1.2

Block 3 - Step3: Get datetime

Type / Role
n8n-nodes-base.code - code
Config choices
Version 2

Block 4 - Step4: Get all user in Redmine6

Type / Role
n8n-nodes-base.httpRequest - httpRequest
Config choices
Version 4.2

Block 5 - Step5: Get a list of closed projects.

Type / Role
n8n-nodes-base.httpRequest - httpRequest
Config choices
Version 4.2

Block 6 - Step7: Get the list of members' leave records for tomorrow.

Type / Role
n8n-nodes-base.httpRequest - httpRequest
Config choices
Version 4.2

Block 7 - End

Type / Role
n8n-nodes-base.noOp - noOp
Config choices
Version 1

Block 8 - End1

Type / Role
n8n-nodes-base.noOp - noOp
Config choices
Version 1

Block 9 - Step1: When Executed by Another Workflow

Type / Role
n8n-nodes-base.executeWorkflowTrigger - executeWorkflowTrigger
Config choices
Version 1.1

Block 10 - Step3: Loop Over Items

Type / Role
n8n-nodes-base.splitInBatches - splitInBatches
Config choices
Version 3

Block 11 - Step4: Get membership list of user in Redmine 6

Type / Role
n8n-nodes-base.httpRequest - httpRequest
Config choices
Version 4.2

Block 12 - Step2: Return redmine list ProjectID of user

Type / Role
n8n-nodes-base.code - code
Config choices
Version 2

Block 13 - Step5: Get redmine project Team MemberIds

Type / Role
n8n-nodes-base.code - code
Config choices
Version 2

Block 14 - Step6: Remove duplicate id

Type / Role
n8n-nodes-base.code - code
Config choices
Version 2

Block 15 - No Operation, do nothing

Type / Role
n8n-nodes-base.noOp - noOp
Config choices
Version 1

Block 16 - Step2: Loop Over Items

Type / Role
n8n-nodes-base.splitInBatches - splitInBatches
Config choices
Version 3

Block 17 - Step3: Wait 1s

Type / Role
n8n-nodes-base.wait - wait
Config choices
Version 1.1

Block 18 - Step6: Get many users

Type / Role
n8n-nodes-base.slack - slack
Config choices
Version 2.4

Block 19 - Step8: Check if there is a record or not?

Type / Role
n8n-nodes-base.if - if
Config choices
Version 2.3

Block 20 - Step9: Handling and get user information in Odoo 18

Type / Role
n8n-nodes-base.code - code
Config choices
Version 2

Block 21 - Step10: Loop Over Items

Type / Role
n8n-nodes-base.splitInBatches - splitInBatches
Config choices
Version 3

Block 22 - Step11: Get leave record information

Type / Role
n8n-nodes-base.httpRequest - httpRequest
Config choices
Version 4.2

Block 23 - Step12: Get name record

Type / Role
n8n-nodes-base.code - code
Config choices
Version 2

Block 24 - Step13: Get employee information in Odoo 18

Type / Role
n8n-nodes-base.httpRequest - httpRequest
Config choices
Version 4.2

Showing the first 24 of 54 workflow blocks. Download the JSON for the full node graph.

3. Summary Table

Workflow Notify Redmine project members in Slack about teammates’ approved Odoo leave
Complexity advanced
Nodes 54
Categories Project Management
Author BHSoft
Published 30 Dec 2025

4. Reproducing the Workflow from Scratch

  1. 1. Download the workflow JSON

    Use the JSON export at /data/workflows/12298/12298.json as the source template for this automation.

  2. 2. Import the template into n8n

    Open n8n, import the downloaded JSON, and review each node before activating the workflow.

  3. 3. Configure credentials and variables

    Replace placeholder credentials, API keys, webhook URLs, account IDs, and environment-specific values with your own settings.

  4. 4. Test with sample data

    Run the workflow manually or in a staging workspace, inspect node output, and confirm downstream systems receive the expected data.

  5. 5. Activate and monitor

    Enable the workflow only after testing, then monitor executions, errors, and rate limits during the first production runs.

5. General Notes & Resources

Review imported nodes carefully before activation. This catalog entry is intended to help you inspect the workflow structure, understand required services, and find related templates faster.

Node names, credentials, schedules, webhook paths, and external service limits may need adjustment for your workspace.

Frequently asked questions

What does Notify Redmine project members in Slack about teammates’ approved Odoo leave do?

Who is this for? This workflow is designed for engineering teams, project managers, and IT operations who need consistent visibility into team availability across multiple projects. It’s perfect ...

What do I need before importing this workflow?

Review the workflow JSON, configure any required credentials in n8n, and test the automation in a safe workspace before using it in production.

Can I customize this workflow?

Yes. Use the block-by-block analysis and the downloadable JSON to inspect each node, then adjust credentials, prompts, schedules, filters, or destinations for your Project Management use case.