title: Paranoia Gem - joins with deleted items
body: <p>I'm using Paranoia gem and now struggling with the problem. I need to joins  <code>has_many</code> deleted items, but it returns not deleted only. My models:</p>
  
  <pre><code>class Mailing &lt; ActiveRecord::Base
  
    acts_as_paranoid
  
    has_many :mailing_fields
    has_many :fields, through: :mailing_fields
  
  end
  
  class MailingField &lt; ActiveRecord::
  
    belongs_to :mailing
    belongs_to :field
  
  end
  
  class Field &lt; ActiveRecord::Base
  
    has_many :mailing_fields, dependent: :destroy
    has_many :mailings, through: :mailing_fields
  
  end
  </code></pre>
  
  <p>Query I'm running which should return <code>mailings</code> with deleted items:</p>
  
  <pre><code>Field.joins(:mailings).where('mailings.id = ?', mailing_id)
  </code></pre>