Get array of workpackage children

lib/open_project/pdf_export/export_card/column_element.rb

@@ -36,8 +36,28 @@ module OpenProject::PdfExport::ExportCard
     def draw
       # Get value from model
       if @work_package.respond_to?(@property_name)
-        value = @work_package.send(@property_name)
+        value = extract_property
       else
+        value = extract_custom_field
+      end
+
+      draw_value(value)
+    end
+
+    private
+
+    def extract_property
+      value = @work_package.send(@property_name)
+
+      case @property_name.to_s
+      when 'children'
+        return value.to_a
+      end
+
+      value
+    end
+
+    def extract_custom_field
       # Look in Custom Fields
       value = ""
       available_languages.each do |locale|
@@ -49,14 +69,10 @@ module OpenProject::PdfExport::ExportCard
         end
         @localised_custom_field_name = @custom_field.name if !!@custom_field
       end
-      end
 
-      draw_value(value)
+      value
     end
 
-    private
-
-
     def available_languages
       Setting.available_languages
     end