```ruby
# frozen_string_literal: true

class ImportJob < ApplicationRecord
  belongs_to :user
  broadcasts_to :user

  enum :status => {
    :waiting => 0,
    :processing => 1,
    :finished => 2,
    :failed => 3
  }

  validates :file,
            size: {less_than: 10.megabytes}

  def parent_slug
    parent_type.constantize.find(parent_id).slug
  end
end
```

Set up file attachment for Import Job
user
```ruby
# frozen_string_literal: true

class ImportJob < ApplicationRecord
  belongs_to :user
  broadcasts_to :user

  has_one_attached :file

  attribute :row_count, :default => 0

  enum :status => {
    :waiting => 0,
    :processing => 1,
    :finished => 2,
    :failed => 3
  }

  validates :file,
            size: {less_than: 10.megabytes}

  def parent_slug
    parent_type.constantize.find(parent_id).slug
  end
end
```
assistant