Don't compile xero report data before search

app/controllers/spree/admin/reports_controller_decorator.rb

@@ -232,7 +232,7 @@ Spree::Admin::ReportsController.class_eval do
     @distributors = Enterprise.is_distributor.managed_by(spree_current_user)
     @order_cycles = OrderCycle.active_or_complete.accessible_by(spree_current_user).order('orders_close_at DESC')
 
-    @report = OpenFoodNetwork::XeroInvoicesReport.new spree_current_user, params
+    @report = OpenFoodNetwork::XeroInvoicesReport.new spree_current_user, params, render_content?
     render_report(@report.header, @report.table, params[:csv], "xero_invoices_#{timestamp}.csv")
   end
 

lib/open_food_network/xero_invoices_report.rb

@@ -1,6 +1,6 @@
 module OpenFoodNetwork
   class XeroInvoicesReport
-    def initialize(user, opts={})
+    def initialize(user, opts = {}, compile_table = false)
       @user = user
 
       @opts = opts.
@@ -9,6 +9,7 @@ module OpenFoodNetwork
                        invoice_date: Time.zone.today,
                        due_date: Time.zone.today + 1.month,
                        account_code: 'food sales'})
+      @compile_table = compile_table
     end
 
     def header
@@ -26,6 +27,7 @@ module OpenFoodNetwork
     end
 
     def table
+      return [] unless @compile_table
       rows = []
 
       orders.each_with_index do |order, i|

spec/features/admin/reports_spec.rb

@@ -423,6 +423,7 @@ feature %q{
     end
 
     it "shows Xero invoices report" do
+      click_button "Search"
       expect(xero_invoice_table).to match_table [
         xero_invoice_header,
         xero_invoice_summary_row('Total untaxable produce (no tax)',       12.54, 'GST Free Income'),

spec/lib/open_food_network/xero_invoices_report_spec.rb

@@ -2,7 +2,7 @@ require 'open_food_network/xero_invoices_report'
 
 module OpenFoodNetwork
   describe XeroInvoicesReport do
-    subject { XeroInvoicesReport.new user }
+    subject { XeroInvoicesReport.new user, {}, true }
 
     let(:user) { create(:user) }