1. // myproject/lib/sequelize-additions.js
    3. module.exports = function sequelizeAdditions(Sequelize) {
    5.   DataTypes = Sequelize.DataTypes
    7.   /*
    8.    */
    10.   ...
    12.   /*
    13.    * Map new types
    14.    */
    17.   /*
    18.    * Add suport for ranges
    19.    */
    21.   // Add postgresql range, newtype comes from DataType.NEWTYPE.key in lower case
    22.   DataTypes.RANGE.types.postgres.subtypes.newtype = 'newtype_range';
    23.   DataTypes.RANGE.types.postgres.castTypes.newtype = 'pg_new_type';
    24. }