'Sequelize UUID with mySQL: Unable to set default value

I've been trying for awhile to set id (primary key) for my Users table as UUID. However, I keep getting this error: Field 'id' doesn't have a default value, when I attempt to seed it.

This is what I have so far in my Users model:

'use strict';
const {
  Model
} = require('sequelize');
module.exports = (sequelize, DataTypes) => {
  class Users extends Model {};
  
Users.init({
    id: {
      type: DataTypes.UUID,
      defaultValue: DataTypes.UUIDV4,
      allowNull: false,
      primaryKey: true
    },
    user_name: {
      type: DataTypes.STRING,
      allowNull: false,
      validate: {
        notNull: {
          msg: 'Please add a name',
        },
      },
    },
  {
    sequelize,
    modelName: 'Users',
  });
  return Users;

Likewise, this is what I have in my Users migration file:

'use strict';
module.exports = {
  up: async (queryInterface, Sequelize) => {
    await queryInterface.createTable('Admins', {
      id: {
        type: Sequelize.UUID,
        defaultValue: Sequelize.UUIDV4,
        allowNull: false,
        primaryKey: true
      },
      user_name: {
        type: Sequelize.STRING
      },
      createdAt: {
        allowNull: false,
        type: Sequelize.DATE
      },
      updatedAt: {
        allowNull: false,
        type: Sequelize.DATE
      }
    });
  },
  down: async (queryInterface, Sequelize) => {
    await queryInterface.dropTable('Users');
  }
};

I'm pretty new to Sequelize, so would love some guidance on what's gone wrong!

mysqlnode.jssequelize.jssequelize-cli


Solution 1:[1]

By adding defaultValue: Sequelize.literal('CURRENT_TIMESTAMP'), to your createdAt and updatedAt in your migration file defaults the value to the current timestamp.

createdAt: {
   allowNull: false,
   type: Sequelize.DATE,
   defaultValue: Sequelize.literal('CURRENT_TIMESTAMP'),
},

Solution 2:[2]

So, I think I realised the issue:

For some reason, seeding it by using a seeder file would not auto-generate the fields that I thought would be auto-generated, so I had to put them in manually.

'use strict';

const { v4: uuidv4 } = require('uuid');

module.exports = {
  up: async (queryInterface, Sequelize) => {
     await queryInterface.bulkInsert('Users', [{
       id: uuidv4(),
        user_name: 'John Doe',
        "createdAt": new Date(),
        "updatedAt": new Date()
        }], {});
  },

  down: async (queryInterface, Sequelize) => {

    await queryInterface.bulkDelete('Users', null, {});

  }
};

Initially, I had been trying to seed (running the command npx sequelize-cli db:seed:all) without the id: uuidv4() and the new Date(), which was why it didn't work.

Sources

This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.

Source: Stack Overflow

Solution Source
Solution 1 iKlaire
Solution 2 SherylHohman

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