linux-kernel-module-cheat/rootfs_overlay/lkmc/nodejs/sequelize/update.js

#!/usr/bin/env node

// https://stackoverflow.com/questions/54898994/bulkupdate-in-sequelize-orm/69044138#69044138

const assert = require('assert');
const path = require('path');

const { Sequelize, DataTypes, Op } = require('sequelize');

const sequelize = new Sequelize({
  dialect: 'sqlite',
  storage: 'tmp.' + path.basename(__filename) + '.sqlite',
});

(async () => {
const Inverses = sequelize.define('Inverses',
  {
    value: {
      type: DataTypes.INTEGER,
      primaryKey: true,
    },
    inverse: {
      type: DataTypes.INTEGER,
    },
    name: {
      type: DataTypes.STRING,
    },
  },
  { timestamps: false }
);
await Inverses.sync({force: true})
await Inverses.create({value: 2, inverse: -2, name: 'two'});
await Inverses.create({value: 3, inverse: -3, name: 'three'});
await Inverses.create({value: 5, inverse: -5, name: 'five'});

// Initial state.
assert.strictEqual((await Inverses.findOne({ where: { value: 2 } })).inverse, -2);
assert.strictEqual((await Inverses.findOne({ where: { value: 3 } })).inverse, -3);
assert.strictEqual((await Inverses.findOne({ where: { value: 5 } })).inverse, -5);
assert.strictEqual(await Inverses.count(), 3);

// Update to fixed value.
await Inverses.update(
  { inverse: 0, },
  { where: { value: { [Op.gt]: 2 } } },
);
assert.strictEqual((await Inverses.findOne({ where: { value: 2 } })).inverse, -2);
assert.strictEqual((await Inverses.findOne({ where: { value: 3 } })).inverse, 0);
assert.strictEqual((await Inverses.findOne({ where: { value: 5 } })).inverse, 0);
assert.strictEqual(await Inverses.count(), 3);

// Update to match another column.
await Inverses.update(
  { inverse: sequelize.col('value'), },
  { where: { value: { [Op.gt]: 2 } } },
);
assert.strictEqual((await Inverses.findOne({ where: { value: 2 } })).inverse, -2);
assert.strictEqual((await Inverses.findOne({ where: { value: 3 } })).inverse, 3);
assert.strictEqual((await Inverses.findOne({ where: { value: 5 } })).inverse, 5);
assert.strictEqual(await Inverses.count(), 3);

// Update to match another column with modification.
await Inverses.update(
  { inverse: sequelize.fn('1 + ', sequelize.col('value')), },
  { where: { value: { [Op.gt]: 2 } } },
);
assert.strictEqual((await Inverses.findOne({ where: { value: 2 } })).inverse, -2);
assert.strictEqual((await Inverses.findOne({ where: { value: 3 } })).inverse, 4);
assert.strictEqual((await Inverses.findOne({ where: { value: 5 } })).inverse, 6);
assert.strictEqual(await Inverses.count(), 3);

// A string function test.
await Inverses.update(
  { name: sequelize.fn('upper', sequelize.col('name')), },
  { where: { value: { [Op.gt]: 2 } } },
);
assert.strictEqual((await Inverses.findOne({ where: { value: 2 } })).name, 'two');
assert.strictEqual((await Inverses.findOne({ where: { value: 3 } })).name, 'THREE');
assert.strictEqual((await Inverses.findOne({ where: { value: 5 } })).name, 'FIVE');
assert.strictEqual(await Inverses.count(), 3);

await sequelize.close();
})();