Redmine/app/views/issues/show.api.rsb

api.issue do
  api.id @issue.id
  api.project(:id => @issue.project_id, :name => @issue.project.name) unless @issue.project.nil?
  api.tracker(:id => @issue.tracker_id, :name => @issue.tracker.name) unless @issue.tracker.nil?
  api.status(:id => @issue.status_id, :name => @issue.status.name) unless @issue.status.nil?
  api.priority(:id => @issue.priority_id, :name => @issue.priority.name) unless @issue.priority.nil?
  api.author(:id => @issue.author_id, :name => @issue.author.name) unless @issue.author.nil?
  api.assigned_to(:id => @issue.assigned_to_id, :name => @issue.assigned_to.name) unless @issue.assigned_to.nil?
  api.category(:id => @issue.category_id, :name => @issue.category.name) unless @issue.category.nil?
  api.fixed_version(:id => @issue.fixed_version_id, :name => @issue.fixed_version.name) unless @issue.fixed_version.nil?
  api.parent(:id => @issue.parent_id) unless @issue.parent.nil?

  api.subject @issue.subject
  api.description @issue.description
  api.start_date @issue.start_date
  api.due_date @issue.due_date
  api.done_ratio @issue.done_ratio
  api.estimated_hours @issue.estimated_hours
  api.spent_hours(@issue.spent_hours) if User.current.allowed_to?(:view_time_entries, @project)

  render_api_custom_values @issue.custom_field_values, api

  api.created_on @issue.created_on
  api.updated_on @issue.updated_on

  render_api_issue_children(@issue, api) if include_in_api_response?('children')

  api.array :attachments do
    @issue.attachments.each do |attachment|
      render_api_attachment(attachment, api)
    end
  end if include_in_api_response?('attachments')

  api.array :relations do
    @relations.each do |relation|
      api.relation(:id => relation.id, :issue_id => relation.issue_from_id, :issue_to_id => relation.issue_to_id, :relation_type => relation.relation_type, :delay => relation.delay)
    end
  end if include_in_api_response?('relations') && @relations.present?

  api.array :changesets do
    @issue.changesets.each do |changeset|
      api.changeset :revision => changeset.revision do
        api.user(:id => changeset.user_id, :name => changeset.user.name) unless changeset.user.nil?
        api.comments changeset.comments
        api.committed_on changeset.committed_on
      end
    end
  end if include_in_api_response?('changesets') && User.current.allowed_to?(:view_changesets, @project)

  api.array :journals do
    @journals.each do |journal|
      api.journal :id => journal.id do
        api.user(:id => journal.user_id, :name => journal.user.name) unless journal.user.nil?
        api.notes journal.notes
        api.created_on journal.created_on
        api.array :details do
          journal.details.each do |detail|
            api.detail :property => detail.property, :name => detail.prop_key do
              api.old_value detail.old_value
              api.new_value detail.value
            end
          end
        end
      end
    end
  end if include_in_api_response?('journals')

  api.array :watchers do
    @issue.watcher_users.each do |user|
      api.user :id => user.id, :name => user.name
    end
  end if include_in_api_response?('watchers') && User.current.allowed_to?(:view_issue_watchers, @issue.project)
end