Sequelize onDelete not working

Question

I have associations between two models defined as below:

For Contact Model (in a separate file)

classMethods: {
      associate: function (models){
          


        

Answer 1

I think you need to define it the other way around.

Contact.belongsTo(models.Users, {
    foreignKeyConstraint: true
    , onDelete: 'cascade'
})

Answer 2

Update association to User.hasMany(models.Contact, { onDelete: 'cascade', hooks: true }) to allow the hooks between associations to fire in order to enable the onDelete cascade. Adapted from the sequelize docs:

However, adding hooks: true explicitly tells Sequelize that optimization is not of your concern and will perform a SELECT on the associated objects and destroy each instance one by one in order to be able to call the hooks with the right parameters.