title: Configure default condition for sequelize queries
body: <p>I have a column featured in most of the tables in a schema. I would like to make it the default behaviour of sequelize to filter every search by this parameter. </p>
  
  <p>The obvious solution is to include the condition in every select. However, I am trying to find some other way, for example insert this condition in the model declaration (maybe using hooks). Also, ideally I would like for the condition to be default but optional. Ultimately I couldn't find a way to make it work.</p>
  
  <p>I went through the sequelize documentation and couldn't find anything. Can such a thing be done in the model declaration or in some other level, before the actual query?</p>