title: How can I skip validations of superclass in Rails 4?
body: <p>I have pretty big RoR app.
  There is superclass named User.</p>
  
  <pre><code>class User &lt; ActiveRecord::Base
    validates :email, presence: true
  end
  </code></pre>
  
  <p>Also I have class Client which inherited by User</p>
  
  <pre><code>class Client &lt; User
  with_options(on: [:personal_info]) do |pi|
    pi.validates :first_name,
                 :last_name,
                 :email,
                 :mobile_phone,
                 :landline_phone,
                 presence: true
    pi.validates :primary_email,
                 email_format: {
                   message: "doesn't look like an email address"
                 }
  end
  end
  </code></pre>
  
  <p>When I create Client's object I got 2 errors that "Email can't be blank."
  How can I disable or skip validates of superclass??
  Remove validations in superclass is impossible.</p>