Change meter event to use the customer's processor ID

app/models/pay/stripe/customer.rb

@@ -236,6 +236,18 @@ def authorize(amount, options = {})
         charge(amount, options.merge(capture_method: :manual))
       end
 
+      # Creates a meter event to bill for usage
+      #
+      # create_meter_event(:api_request, value: 1)
+      # create_meter_event(:api_request, token: 7)
+      def create_meter_event(event_name, payload: {}, **options)
+        api_record unless processor_id?
+        ::Stripe::Billing::MeterEvent.create({
+          event_name: event_name,
+          payload: {stripe_customer_id: processor_id}.merge(payload)
+        }.merge(options))
+      end
+
       private
 
       # Options for Stripe requests

app/models/pay/stripe/subscription.rb

@@ -301,21 +301,6 @@ def swap(plan, **options)
         raise Pay::Stripe::Error, e
       end
 
-      # Creates a meter event to bill for usage
-      #
-      # create_meter_event(:api_request, value: 1)
-      # create_meter_event(:api_request, token: 7)
-      def create_meter_event(event_name, **payload)
-        api_record unless processor_id?
-        ::Stripe::Billing::MeterEvent.create({
-          event_name: event_name,
-          payload: {
-            stripe_customer_id: processor_id,
-            **payload
-          }
-        })
-      end
-
       # Creates a metered billing usage record
       #
       # Uses the first subscription_item ID unless `subscription_item_id: "si_1234"` is passed

docs/stripe/6_metered_billing.md

@@ -9,7 +9,7 @@ Metered billing are subscriptions where the price fluctuates monthly. For exampl
 This will create a new metered billing subscription. You can then create meter events to bill for usage:
 
 ```ruby
-pay_subscription.create_meter_event(:api_request, value: 1)
+@user.payment_processor.create_meter_event(:api_request, payload: { value: 1 })
 ```
 
 If your price is using the legacy usage records system, you will need to use the below method: