Added running total calculated using subtask totals from the entire issue tree

app/views/line_items/_issue_line_items.html.erb

@@ -32,8 +32,18 @@
     <tfoot>
       <tr>
         <td colspan="3" style="text-align:right;"><strong><%= t :label_total %></strong></td>
-        <td><strong><%= number_to_currency(total) %></strong></td>
+        <td>
+          <strong><%= number_to_currency(total) %></strong>
+        </td>
       </tr>
+      <% if @issue.children? %>
+        <tr>
+          <td colspan="3" style="text-align:right;"><strong><%= t :label_running_total %></strong></td>
+          <td>
+            <strong>(<%= number_to_currency(@issue.descendant_line_items_total + total) %>)</strong>
+          </td>
+        </tr>
+      <% end %>
     </tfoot>
   </table>
 </div>

config/locales/en.yml

@@ -33,6 +33,7 @@ en:
   label_no: "No"
   label_qty: "Quantity"
   label_remove: "Remove"
+  label_running_total: "Running Total"
   label_sync_now_accounts: "Sync Accounts"
   label_sync_now_items: "Sync Items"
   label_type: "Type"

lib/line_items/patches/issue_patch.rb

@@ -16,6 +16,30 @@ module LineItems
         has_many :line_items, dependent: :destroy
         accepts_nested_attributes_for :line_items, allow_destroy: true, reject_if: proc { |attrs| attrs['description'].blank? }
 
+        # Returns line items for immediate children
+        def children_line_items
+          LineItem.where(issue_id: self.children.pluck(:id))
+        end
+
+        # Calculates the total value of all child line items
+        def children_line_items_total
+          children_line_items.sum(:line_total)
+        end
+
+        # Returns line items for the entire tree below this issue
+        def descendant_line_items
+          LineItem.where(issue_id: self.descendants.pluck(:id))
+        end
+
+        # Calculates the total value of entire tree below this issue
+        def descendant_line_items_total
+          descendant_line_items.sum(:line_total)
+        end
+
+        def line_items_total
+          line_items.sum(:line_total)
+        end
+
         def line_items_attributes=(attrs)
           attrs = attrs.stringify_keys