Separate showing and rendering report

app/controllers/admin/reports_controller.rb

@@ -6,7 +6,7 @@ module Admin
     include ReportsActions
     helper ReportsHelper
 
-    before_action :authorize_report, only: [:show]
+    before_action :authorize_report, only: [:show, :create]
 
     # Define model class for Can? permissions
     def model_class
@@ -20,14 +20,17 @@ module Admin
     end
 
     def show
-      @report = report_class.new(spree_current_user, params, render: render_data?)
+      @report = report_class.new(spree_current_user, params, render: false)
       @rendering_options = rendering_options # also stores user preferences
 
-      if render_data?
-        render_in_background
-      else
-        show_report
-      end
+      show_report
+    end
+
+    def create
+      @report = report_class.new(spree_current_user, params, render: true)
+      @rendering_options = rendering_options # also stores user preferences
+
+      render_in_background
     end
 
     private
@@ -54,10 +57,6 @@ module Admin
       @variant_serialized = Api::Admin::VariantSerializer.new(variant)
     end
 
-    def render_data?
-      request.post?
-    end
-
     def render_in_background
       cable_ready[ScopedChannel.for_id(params[:uuid])]
         .inner_html(

app/models/spree/ability.rb

@@ -244,7 +244,7 @@ module Spree
 
       # Reports page
       can [:admin, :index, :show], ::Admin::ReportsController
-      can [:admin, :show, :customers, :orders_and_distributors, :group_buys, :payments,
+      can [:admin, :show, :create, :customers, :orders_and_distributors, :group_buys, :payments,
            :orders_and_fulfillment, :products_and_inventory, :order_cycle_management,
            :packing, :enterprise_fee_summary, :bulk_coop], :report
     end
@@ -324,7 +324,7 @@ module Spree
       end
 
       # Reports page
-      can [:admin, :index, :show], ::Admin::ReportsController
+      can [:admin, :index, :show, :create], ::Admin::ReportsController
       can [:admin, :customers, :group_buys, :sales_tax, :payments,
            :orders_and_distributors, :orders_and_fulfillment, :products_and_inventory,
            :order_cycle_management, :xero_invoices, :enterprise_fee_summary, :bulk_coop], :report

config/routes/admin.rb

@@ -135,6 +135,7 @@ Openfoodnetwork::Application.routes.draw do
     end
 
     get '/reports', to: 'reports#index', as: :reports
-    match '/reports/:report_type(/:report_subtype)', to: 'reports#show', via: [:get, :post], as: :report
+    match '/reports/:report_type(/:report_subtype)', to: 'reports#show', via: :get, as: :report
+    match '/reports/:report_type(/:report_subtype)', to: 'reports#create', via: :post
   end
 end

spec/controllers/admin/reports_controller_spec.rb

@@ -310,7 +310,7 @@ RSpec.describe Admin::ReportsController, type: :controller do
     end
 
     it "triggers the delivery report" do
-      spree_post :show, {
+      spree_post :create, {
         q: { completed_at_lt: 1.day.ago },
         shipping_method_in: ["123"], # We just need to search for shipping methods
         report_type: :order_cycle_management,