allow loading of pes by id.

app/assets/javascripts/timelines.js

@@ -4971,7 +4971,7 @@ Timeline = {
     // construct tooltip content information.
 
     info += "<b>";
-    info += this.escape(renderable.name);
+    info += this.escape(renderable.subject);
     info += "</b>";
     if (renderable.is(Timeline.PlanningElement)) {
       info += " (*" + renderable.id + ")";

app/controllers/api/v2/planning_elements_controller.rb

@@ -119,7 +119,9 @@ module Api
 
       # Filters
       def find_all_projects_by_project_id
-        if params[:project_id] !~ /,/
+        if !params[:project_id] then
+          @planning_elements = WorkPackage.find_all_by_id(params[:ids])
+        elsif params[:project_id] !~ /,/
           find_project_by_project_id         unless performed?
           authorize                          unless performed?
           assign_planning_elements(@project) unless performed?

doc/CHANGELOG.md

@@ -38,6 +38,7 @@ See doc/COPYRIGHT.rdoc for more details.
 * `#2371` Add support for IE10 to Timelines
 * `#2448` Accelerate work package updates
 * `#2464` No initial attachment journal for messages
+* `#2470` [Timelines] Vertical planning elements which are not displayed horizontally are not shown in timeline report 
 * `#2479` Remove TinyMCE spike
 * `#2557` Highlight changes of any work package attribute available in the timelines table  
 * `#2559` Migrate existing IssueCustomFields to WorkPackageCustomFields