# File activerecord/lib/active_record/migration.rb, line 700
def check_all_pending!
pending_migrations = []
ActiveRecord::Tasks::DatabaseTasks.with_temporary_pool_for_each(env: env) do |pool|
if pending = pool.migration_context.open.pending_migrations
pending_migrations << pending
end
end
migrations = pending_migrations.flatten
if migrations.any?
raise ActiveRecord::PendingMigrationError.new(pending_migrations: migrations)
end
end