more sequelize as usual

rootfs_overlay/lkmc/nodejs/sequelize/update.js

@@ -0,0 +1,83 @@
+#!/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();
+})();