First of all, please use this guidelines to make sure that you've updated to the most recent version of 2.6 branch. After that follow this guidelines:
cd your-redmine-location svn update svn switch https://svn.redmine.org/redmine/branches/3.0-stable ./ bundle update bundle exec rake db:migrate RAILS_ENV=production bundle exec rake redmine:plugins:migrate RAILS_ENV=production bundle exec rake tmp:cache:clear tmp:sessions:clear RAILS_ENV=production
If you see this error:
Warning: this Gemfile contains multiple primary sources. Using `source` more than once without a block is a security risk, and may result in installing unexpected gems. To resolve this warning, use a block to indicate which gems should come from the secondary source. To upgrade this warning to an error, run `bundle config disable_multisource true`.
It means that you have more than one source in your Gemfile. For example if you use Rails Assets, it might look like this:
source 'https://rubygems.org' source 'https://rails-assets.org' # Gems list here...
It is unsafe, because the second source could "inject" a different version of your gems.
To prevent this, you need to declare which gems you want from the second source:
source 'https://rails-assets.org' do
%w(
jquery jquery-ujs bootstrap jquery-icheck select2 zeroclipboard
font-awesome modernizer dropzone seiyria-bootstrap-slider jquery-masonry
jquery-infinite-scroll imagesloaded markitup livestampjs datetimepicker
videojs jquery.lazyload magnific-popup
).each do |asset_source|
gem "rails-assets-#{asset_source}"
end
end
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