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Commit [r3573] Maximize Restore History

Adds subtasking (#443) including:

* priority, start/due dates, progress, estimate, spent time roll-up to parent issues
* descendant issues tree displayed on the issue view with context menu support
* issue tree display on the gantt chart
* issue tree copy on project copy
* unlimited nesting

Defining subtasks requires the new permission 'Manage subtasks'.
Subtasks can not belong to a different project than the parent task.

Implementation is based on scoped nested sets for fast reads and updates.

Authored by: jplang 2010-03-13

Browse code at this revision

Parent: [r3572]

Child: [r3574]

1 2 > >> (Page 1 of 2)

changed	/trunk/app/controllers/issues_controller.rb
changed	/trunk/app/controllers/timelog_controller.rb
changed	/trunk/app/helpers/issues_helper.rb
changed	/trunk/app/models/issue.rb
changed	/trunk/app/models/issue_relation.rb
changed	/trunk/app/models/project.rb
changed	/trunk/app/views/issues/_attributes.rhtml
changed	/trunk/app/views/issues/_form.rhtml
added	/trunk/app/views/issues/auto_complete.html.erb
changed	/trunk/app/views/issues/gantt.rhtml
changed	/trunk/app/views/issues/show.rhtml
changed	/trunk/config/locales/en.yml
changed	/trunk/config/locales/fr.yml
added	/trunk/db/migrate/20100313132032_add_issues_nested_sets_columns.rb
changed	/trunk/lib/redmine.rb
changed	/trunk/lib/redmine/default_data/loader.rb
changed	/trunk/lib/redmine/helpers/gantt.rb
added	/trunk/public/images/task_parent_end.png
changed	/trunk/public/javascripts/application.js
changed	/trunk/public/stylesheets/application.css
changed	/trunk/test/fixtures/enumerations.yml
changed	/trunk/test/fixtures/issues.yml
changed	/trunk/test/fixtures/roles.yml
changed	/trunk/test/functional/issues_controller_test.rb
added	/trunk/test/unit/issue_nested_set_test.rb