(fix) Add table name prefix override and ActiveRecord dependency for …

…POA requests

- Override `table_name_prefix` to 'ar_' for models in the Accredited Representative Portal
- Add `activerecord` as a development dependency to fix spec issues

This ensures Power of Attorney request models in the engine use the correct table prefix
and that all specs pass successfully.

modules/accredited_representative_portal/accredited_representative_portal.gemspec

@@ -20,5 +20,6 @@ Gem::Specification.new do |spec|
   spec.test_files = Dir['spec/**/*']
 
   spec.add_dependency 'blind_index'
+  spec.add_development_dependency 'activerecord'
   spec.add_development_dependency 'rspec-rails'
 end

modules/accredited_representative_portal/lib/accredited_representative_portal/engine.rb

@@ -3,6 +3,16 @@
 module AccreditedRepresentativePortal
   class Engine < ::Rails::Engine
     isolate_namespace AccreditedRepresentativePortal
+
+    # `isolate_namespace` redefines `table_name_prefix` on load of
+    # `active_record`, so we append our own callback to redefine it again how we
+    # want.
+    ActiveSupport.on_load(:active_record) do
+      AccreditedRepresentativePortal.redefine_singleton_method(:table_name_prefix) do
+        'ar_'
+      end
+    end
+
     config.generators.api_only = true
 
     # So that the app-wide migration command notices our engine's migrations.