customer model

app/controllers/customers_controller.rb

@@ -7,12 +7,22 @@ module DiscoursePatrons
     before_action :set_api_key
 
     def create
+      begin
         customer = ::Stripe::Customer.create(
           email: current_user.email,
           source: params[:source]
         )
 
+        DiscoursePatrons::Customer.create(
+          customer_id: customer.id
+          user_id: current_user.id
+        )
+
         render_json_dump customer
+
+      rescue ::Stripe::InvalidRequestError => e
+        return render_json_error e.message
+      end
     end
   end
 end

app/models/customer.rb

@@ -0,0 +1,7 @@
+# frozen_string_literal: true
+
+module DiscoursePatrons
+  class Customer < ActiveRecord::Base
+    self.table_name = "discourse_patrons_customers"
+  end
+end

db/migrate/20191025031631_create_customers.rb

@@ -0,0 +1,11 @@
+class CreateCustomers < ActiveRecord::Migration[5.2]
+  def change
+    create_table :discourse_patrons_customers do |t|
+      t.string :customer_id, null: false
+      t.references :user, foreign_key: true
+      t.timestamps
+    end
+
+    add_index :discourse_patrons_customers, :customer_id, unique: true
+  end
+end

plugin.rb

@@ -55,6 +55,7 @@ after_initialize do
     "../app/controllers/products_controller",
     "../app/controllers/subscriptions_controller",
     "../app/models/payment",
+    "../app/models/customer",
     "../app/serializers/payment_serializer",
   ].each { |path| require File.expand_path(path, __FILE__) }
 

spec/requests/customers_controller_spec.rb

@@ -5,13 +5,14 @@ require 'rails_helper'
 module DiscoursePatrons
   RSpec.describe CustomersController do
     describe "create" do
+      describe "authenticated" do
         let(:user) { Fabricate(:user, email: 'hello.2@example.com') }
 
         before do
           sign_in(user)
         end
 
-      it "creates a customer" do
+        it "creates a stripe customer" do
           ::Stripe::Customer.expects(:create).with(
             email: 'hello.2@example.com',
             source: 'tok_interesting'
@@ -19,6 +20,15 @@ module DiscoursePatrons
 
           post "/patrons/customers.json", params: { source: 'tok_interesting' }
         end
+
+        it "saves the customer" do
+          ::Stripe::Customer.expects(:create).returns(id: 'cus_id23456')
+
+          expect {
+            post "/patrons/customers.json", params: { source: 'tok_interesting' }
+          }.to change { DiscoursePatrons::Customer.count }
+        end
+      end
     end
   end
 end