run the migration script on assignment v2 toggle

app/javascript/dashboard/components-next/input/DurationInput.vue

@@ -43,7 +43,7 @@ const transformedValue = computed({
   },
   set(newValue) {
     if (newValue == null || newValue === '') {
-      duration.value = props.min || null;
+      duration.value = null;
       return;
     }
     let minuteValue = convertToMinutes(newValue);

enterprise/app/jobs/migration/account_assignment_policy_job.rb

@@ -1,20 +1,9 @@
-class MigrateMaxAssignmentLimitToPolicies < ActiveRecord::Migration[7.1]
-  # Ruby's max for a 32-bit signed integer, matching PostgreSQL's integer column limit
+class Migration::AccountAssignmentPolicyJob < ApplicationJob
+  queue_as :default
+
   INT_MAX = (2**31) - 1
 
-  def up
-    Account.find_each do |account|
-      migrate_account(account)
-    end
-  end
-
-  def down
-    AgentCapacityPolicy.where(name: 'Auto Assignment Capacity').destroy_all
-  end
-
-  private
-
-  def migrate_account(account)
+  def perform(account)
     inboxes_with_limit = account.inboxes
                                 .where("auto_assignment_config->>'max_assignment_limit' ~ '^[1-9]'")
 
@@ -30,6 +19,8 @@ class MigrateMaxAssignmentLimitToPolicies < ActiveRecord::Migration[7.1]
     end
   end
 
+  private
+
   def create_inbox_limits(policy, inboxes)
     inboxes.each do |inbox|
       next if InboxCapacityLimit.exists?(agent_capacity_policy_id: policy.id, inbox_id: inbox.id)

enterprise/app/models/enterprise/account.rb

@@ -44,6 +44,7 @@ module Enterprise::Account
     if feature_enabled?('assignment_v2')
       # Enable advanced_assignment for Business/Enterprise plans
       send('feature_advanced_assignment=', true) if business_or_enterprise_plan?
+      Migration::AccountAssignmentPolicyJob.perform_later(self)
     else
       # Disable advanced_assignment when assignment_v2 is disabled
       send('feature_advanced_assignment=', false)

lib/tasks/migrate_max_assignment_limit.rake

@@ -1,12 +0,0 @@
-# Manually run the max_assignment_limit to agent capacity policy migration.
-# This is idempotent and safe to run multiple times.
-#
-# Usage:
-#   bundle exec rake assignment:migrate_max_limit
-namespace :assignment do
-  desc 'Migrate max_assignment_limit from inbox config to agent capacity policies'
-  task migrate_max_limit: :environment do
-    require Rails.root.join('db/migrate/20260316000001_migrate_max_assignment_limit_to_policies')
-    MigrateMaxAssignmentLimitToPolicies.new.up
-  end
-end