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Plugin to merge two Redmine databases.
branch: master


Merge Redmine

Plugin to merge two Redmine databases.


  • __FEATURE__

Getting the plugin

A copy of the plugin can be downloaded from Little Stream Software or from GitHub

Installation and Setup

  1. Follow the Redmine plugin installation steps at:

  2. Restart your Redmine web servers (e.g. mongrel, thin, mod_rails)

  3. Run the merge as described below


Make sure you backup both of your databases. There is no undo for these commands.

Define the second database (Source)

Edit the config/database.yml in the Redmine root, adding a definition for the source_redmine:

  adapter: mysql
  host: localhost
  username: root
  password: password
  database: redmine_target

  adapter: mysql
  host: localhost
  username: root
  password: password
  database: redmine_import

Run the database merge

Run the included rake task from the Redmine root “rake redmine:merge_redmine RAILS_ENV=production”

Check your data

When it's completed, the contents of the source_redmine database (redmine_import above) should have been merged into your production database (redmine_target).


  • Before running the rake task, run “rake redmine:data_report RAILS_ENV=production” to print out the total number of records you are using in your target database. After the migration, you can rerun this to see how many were added.


This plugin is licensed under the GNU GPL v2. See COPYRIGHT.txt and GPL.txt for details.

Project help

If you need help you can contact the maintainer at the Bug Tracker. The bug tracker is located at

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