more sequelize as usual

rootfs_overlay/lkmc/nodejs/sequelize/updateOnDuplicate.js

@@ -0,0 +1,60 @@
+#!/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 } = require('sequelize');
+
+const sequelize = new Sequelize({
+  dialect: 'sqlite',
+  storage: 'tmp.' + path.basename(__filename) + '.sqlite',
+});
+
+(async () => {
+const IntegerNames = sequelize.define('IntegerNames',
+  {
+    value: {
+      type: DataTypes.INTEGER,
+      unique: true, // mandatory
+      primaryKey: true,
+    },
+    name: {
+      type: DataTypes.STRING,
+    },
+  },
+  {
+    timestamps: false,
+  }
+);
+await IntegerNames.sync({force: true})
+await IntegerNames.create({value: 2, name: 'two'});
+await IntegerNames.create({value: 3, name: 'three'});
+await IntegerNames.create({value: 5, name: 'five'});
+
+// Initial state.
+assert.strictEqual((await IntegerNames.findOne({ where: { value: 2 } })).name, 'two');
+assert.strictEqual((await IntegerNames.findOne({ where: { value: 3 } })).name, 'three');
+assert.strictEqual((await IntegerNames.findOne({ where: { value: 5 } })).name, 'five');
+assert.strictEqual(await IntegerNames.count(), 3);
+
+// Update.
+await IntegerNames.bulkCreate(
+  [
+    {value: 2, name: 'TWO'},
+    {value: 3, name: 'THREE'},
+    {value: 7, name: 'SEVEN'},
+  ],
+  { updateOnDuplicate: ["name"] }
+);
+
+// Final state.
+assert.strictEqual((await IntegerNames.findOne({ where: { value: 2 } })).name, 'TWO');
+assert.strictEqual((await IntegerNames.findOne({ where: { value: 3 } })).name, 'THREE');
+assert.strictEqual((await IntegerNames.findOne({ where: { value: 5 } })).name, 'five');
+assert.strictEqual((await IntegerNames.findOne({ where: { value: 7 } })).name, 'SEVEN');
+assert.strictEqual(await IntegerNames.count(), 4);
+
+await sequelize.close();
+})();