Redmine

Starting in version 2.3.0 when issues which share a parent issue are assigned a relation to each other, the relation fails with the error: "This relation would create a circular dependency". This used to work in previous releases, and is an important part of our workflow.

I believe this is a regression introduced by issue #8794. I was able to restore the old behavior by reverting commit r11641 as seen in the attached patch.

1. Be running redmine 2.3.0
2. Create 3 new issues (issues 1, 2, and 3)
3. Assign the parent task of of issues 2 and 3 to issue 1
4. Try to add a relation that issue 3 follows issue 2
5. Observe that adding the relation fails with the error: "This relation would create a circular dependency"

Information about my environment:

> RAILS_ENV=production rake about
About your application's environment
Ruby version              1.9.3 (x86_64-darwin10.7.0)
RubyGems version          1.8.25
Rack version              1.4
Rails version             3.2.13
Active Record version     3.2.13
Action Pack version       3.2.13
Active Resource version   3.2.13
Action Mailer version     3.2.13
Active Support version    3.2.13
Middleware                Rack::Cache, ActionDispatch::Static, Rack::Lock, #<ActiveSupport::Cache::Strategy::LocalCache::Middleware:0x00000101df0960>, Rack::Runtime, Rack::MethodOverride, ActionDispatch::RequestId, Rails::Rack::Logger, ActionDispatch::ShowExceptions, ActionDispatch::DebugExceptions, ActionDispatch::RemoteIp, ActionDispatch::Callbacks, ActiveRecord::ConnectionAdapters::ConnectionManagement, ActiveRecord::QueryCache, ActionDispatch::Cookies, ActionDispatch::Session::CookieStore, ActionDispatch::Flash, ActionDispatch::ParamsParser, ActionDispatch::Head, Rack::ConditionalGet, Rack::ETag, ActionDispatch::BestStandardsSupport, OpenIdAuthentication
Application root          /Users/redmine/redmine-2.3.0
Environment               production
Database adapter          postgresql
Database schema version   20130217094251