sequelize-notupdate-attributes

A very simple Sequelize plugin which adds no update and readonly attributes support. Compatible with sequelize v6.

Warning

The project is based on the repository node-sequelize-notupdate-attributes, now compatible with v6 of sequelize.

Prerequisites

Have previously installed the sequelize package in the project.

Install

Using npm:

npm install --save sequelize-notupdate-attributes

Using yarn:

yarn add -D sequelize-notupdate-attributes

Usage

Add the plugin to the sequelize instance and then set the noupdate properties in your models, as shown in the basic example below:

var sequelizeNoUpdateAttributes = require('sequelize-notupdate-attributes');
 
var sequelize = new Sequelize('database', 'user', 'password');
sequelizeNoUpdateAttributes(sequelize); // Note that is the `sequelize` instance the passed reference.
 
var Post = sequelize.define('Post', {
  content: {
    type: Sequelize.STRING,
    noUpdate: true,
  },
});

What this do is to mark the content attribute so if an update is done, then:

• if the field previous value is null, it will accept the change
• if the field previous value is not null, it will trigger a SequelizeValidationErrorItem error.

so, the content field becomes a readonly after its becomes not null.

Works too with foreign key fields in associations:

models.Post.belongsTo(models.Person, {
  as: 'Creator',
  foreignKey: {
    allowNull: false,
    noUpdate: true, // Will mark the `CreatorId` field to be `noUpdate`d.
  },
});

Readonly attributes

If you do want truly readonly attributes with no modifications at all being allowed, you can use the readonly option as shown below:

var Post = sequelize.define('Post', {
  content: {
    type: Sequelize.STRING,
    noUpdate: {
      readOnly: true,
    },
  },
});

which effectively disables any modification on the content attribute, no matter if the previous value was null or not, though exception is when the record is new.

Issues

The source is available for download from GitHub and there is a issue tracker so you can report bugs there.

Tests

To run the tests just execute yarn test.

License

The MIT License (MIT)