fix: assigned_conversation_new_message? NoMethod error (#5225)

app/builders/notification_builder.rb

@@ -15,6 +15,9 @@ class NotificationBuilder
 
   def user_subscribed_to_notification?
     notification_setting = user.notification_settings.find_by(account_id: account.id)
+    # added for the case where an assignee might be removed from the account but remains in conversation
+    return if notification_setting.blank?
+
     return true if notification_setting.public_send("email_#{notification_type}?")
     return true if notification_setting.public_send("push_#{notification_type}?")
 

spec/builders/notification_builder_spec.rb

@@ -0,0 +1,40 @@
+require 'rails_helper'
+
+describe ::NotificationBuilder do
+  include ActiveJob::TestHelper
+
+  describe '#perform' do
+    let!(:account) { create(:account) }
+    let!(:user) { create(:user, account: account) }
+    let!(:primary_actor) { create(:conversation, account: account) }
+
+    before do
+      notification_setting = user.notification_settings.find_by(account_id: account.id)
+      notification_setting.selected_email_flags = [:email_conversation_creation]
+      notification_setting.save!
+    end
+
+    it 'creates a notification' do
+      expect do
+        described_class.new(
+          notification_type: 'conversation_creation',
+          user: user,
+          account: account,
+          primary_actor: primary_actor
+        ).perform
+      end.to change { user.notifications.count }.by(1)
+    end
+
+    it 'will not throw error if notification setting is not present' do
+      user.account_users.destroy_all
+      expect(
+        described_class.new(
+          notification_type: 'conversation_creation',
+          user: user,
+          account: account,
+          primary_actor: primary_actor
+        ).perform
+      ).to be_nil
+    end
+  end
+end