init.rb

Dispatcher.to_prepare do
    require_dependency 'version'
    require_dependency 'issue'
    require_dependency 'issue_relation'
    require_dependency 'version'
    require_dependency 'project'

    Issue::SAFE_ATTRIBUTES << "story_points" if Issue.const_defined? "SAFE_ATTRIBUTES"
    Issue::SAFE_ATTRIBUTES << "remaining_hours" if Issue.const_defined? "SAFE_ATTRIBUTES"
    Issue::SAFE_ATTRIBUTES << "position" if Issue.const_defined? "SAFE_ATTRIBUTES"

    Query.send(:include, QueryPatch) unless Query.included_modules.include? QueryPatch
    Issue.send(:include, IssuePatch) unless Issue.included_modules.include? IssuePatch
    Version.send(:include, VersionPatch) unless Version.included_modules.include? VersionPatch
    Project.send(:include, ProjectPatch) unless Project.included_modules.include? ProjectPatch
end

issue_patch.rb

module IssuePatch
    def self.included(base) # :nodoc:
        base.extend(ClassMethods)
        base.send(:include, InstanceMethods)

        base.class_eval do
            unloadable

            alias_method_chain :move_to_project_without_transaction, :autolink
            alias_method_chain :recalculate_attributes_for, :remaining_hours
            after_save    :task_follows_story
        end
    end

    module ClassMethods
    end

    module InstanceMethods