Merge pull request #6200 from rubygems/fix-organization-invite-admin

Fix polymorphic errors when viewing organization invites

Author: jenshenny

app/avo/resources/organization_invite.rb

@@ -4,7 +4,8 @@ class Avo::Resources::OrganizationInvite < Avo::BaseResource
 
   def fields
     field :id, as: :id
-    field :invitable, as: :belongs_to
+    field :invitable_type, as: :text
+    field :invitable, as: :belongs_to, polymorphic_as: :invitable
     field :user, as: :belongs_to
     field :role, as: :select, enum: OrganizationInvite.roles
   end