title: How to validate all the fields at once by making a default validator in django restframework?
body: <p>I don't want to use Field level or object level validation. While doing POST API call in django restframework, I want to call a default validator by <strong>is_valid()</strong> method. No arguments should be passed while calling this method and all the fields should be validated.
  <strong>It should be fully generic, so that I can add as many validations as possible.</strong></p>