Fix POST /orders

lib/generators/templates/spec/requests/customer/order_spec.rb

@@ -211,7 +211,7 @@ RSpec.describe "#{namespace}/orders", type: :request, capture_examples: true, ta
               meta: { type: :object },
               incr_snapshot_ids: { type: :array },
             },
-          snapshots: {
+          snapshot: {
             type: :object, properties: {
               shotengai_series_id: { type: :integer },
               count: { type: :integer },
@@ -229,7 +229,7 @@ RSpec.describe "#{namespace}/orders", type: :request, capture_examples: true, ta
               user_remark: 'user remark ...',
               incr_snapshot_ids: [ @snapshot_2.id ],              
             },
-            snapshots: { 
+            snapshot: { 
               shotengai_series_id: @series_1.id,
               count: 10,
             }

lib/shotengai/buyer.rb

@@ -38,15 +38,16 @@ module Shotengai
             end
           end
 
-          def buy_it_immediately snapshots_param, order_params
+          def buy_it_immediately snapshot_param, order_params
             ActiveRecord::Base.transaction do
               order = self.#{collection_name}.create!(order_params)
-              snapshots_param && Shotengai::Series.find(snapshots_param[:shotengai_series_id]).snapshots.create!(
-                  snapshots_param.merge({ 
+              snapshot_param && Shotengai::Series.find(snapshot_param[:shotengai_series_id]).snapshots.create!(
+                  snapshot_param.merge({ 
                     shotengai_order: order 
                   })
                 )
               order
+              
             end
           end
         ")