a gist for https://medium.com/@mohammedalrowad/painless-file-upload-using-feathersjs-services-e994e4734e0c

uploads.model.js

const Sequelize = require('sequelize');
const DataTypes = Sequelize.DataTypes;
module.exports = function (app) {
  const sequelizeClient = app.get('sequelizeClient');
  const uploads = sequelizeClient.define('uploads', {
    description: {
      type: DataTypes.TEXT,
      allowNull: false
    },
    orignalName: {
      type: DataTypes.STRING,
      allowNull: false
    },
    newNameWithPath: {
      type: DataTypes.STRING,
      allowNull: false
    }
  }, {
    hooks: {
      beforeCount(options) {
        options.raw = true;
      }
    }
  });
  uploads.associate = function (models) {
    const {
      users
    } = models;
    uploads.belongsTo(users);
  };
  return uploads;
};