title: Sequelize onDelete not working
body: <p>I have associations between two models defined as below:</p>
  
  <p>For Contact Model (in a separate file)</p>
  
  <pre><code>classMethods: {
        associate: function (models){
           Contact.belongsTo(models.User)
        }
  }
  </code></pre>
  
  <p>For User(in a separate file)</p>
  
  <pre><code>classMethods: {
       associate: function (models){
          User.hasMany(models.Contact, {onDelete: 'CASCADE'})
       }
  }
  </code></pre>
  
  <p>The problem is when deleting the user the contact related to the user is not deleting any advice on what am I doing wrong would be helpful?</p>
  
  <p>Thanks in advance</p>