op.null code example

Example 1: sequelize order by

order: [["createdAt", "DESC"]]

Example 2: op in sequelize

//First method
// selecting authorityId :12 or 13
model.findAll({
  where: {
    [Op.or]: [
      { authorId: 12 },
      { authorId: 13 }
    ]
  }
});