Fix removing allowed domains being done synchronously (#14302)

* Fix removing allowed domains being done synchronously

* Add tests

2 files changed, 11 insertions, 3 deletions

diff --git a/app/services/after_unallow_domain_service.rb b/app/services/after_unallow_domain_service.rb
new file mode 100644
index 00000000000..ccd0b8ae919
--- /dev/null
+++ b/app/services/after_unallow_domain_service.rb
@@ -0,0 +1,9 @@
+# frozen_string_literal: true
+
+class AfterUnallowDomainService < BaseService
+  def call(domain)
+    Account.where(domain: domain).find_each do |account|
+      SuspendAccountService.new.call(account, reserve_username: false)
+    end
+  end
+end
diff --git a/app/services/unallow_domain_service.rb b/app/services/unallow_domain_service.rb
index 870c799514b..fc526076122 100644
--- a/app/services/unallow_domain_service.rb
+++ b/app/services/unallow_domain_service.rb
@@ -12,8 +12,7 @@ class UnallowDomainService < BaseService
   private
 
   def suspend_accounts!(domain)
-    Account.where(domain: domain).find_each do |account|
-      SuspendAccountService.new.call(account, reserve_username: false)
-    end
+    Account.where(domain: domain).in_batches.update_all(suspended_at: Time.now.utc)
+    AfterUnallowDomainWorker.perform_async(domain)
   end
 end