sequelize-values

sequelize-values.js

Easily get raw data from Sequelize instances

What it does

A few utility functions for getting raw data from Sequelize instances. Includes ability to remove duplicate data.

Current status

Requires Sequelize v2.x.x, v3.x.x or v4.x.x.

Version v1.0.0 onwards supports only Node v4 or higher. Currently, all tests pass on Node v0.10 and v0.12, but these versions of Node will no longer be tested against so this cannot be guaranteed in future releases.

Usage

Loading module

To load module:

var Sequelize = require('sequelize-values')();
// NB Sequelize must also be present in `node_modules`

or, a more verbose form useful if chaining multiple Sequelize plugins:

var Sequelize = require('sequelize');
require('sequelize-values')(Sequelize);

Methods

Instance#getValues()

Like Sequelize's native Instance#values, except that it recursively calls getValues() on any nested values. So if you get an instance from Model#find() with eager-loaded associations, the associated Instances returned are also converted to values.

Task.find( { include: [ User ] } )
.then(function(task) {
	return task.getValues();
	// returns the attributes of the Task,
	// with the attributes of the User also converted to values rather than a DAO.
});

Sequelize.getValues(input)

Same as Instance#getValues() except can be called with an Instance or array of Instances.

Task.findAll( { include: [ User ] } )
.then(function(tasks) {
	return Sequelize.getValues(tasks);
	// returns the array of Tasks, with each Task converted to plain attributes,
	// with the attributes of the Users also converted to values rather than DAOs.
});

Instance#getValuesDedup()

Same as Instance#getValues(), except removes redundant duplicated data, e.g. removes id fields which are repeated twice.

Useful if you want to e.g. send the values of an Model Instance to the browser without sending unnecessary duplicated data.

Examples:

belongsTo association

// .getValues() - UserId is repeated as UserId and user.id
{ name: 'A task', UserId: 1, User: { id: 1, name: 'A user' } }
// .getValuesDedup() - UserId is removed
{ name: 'A task', User: { id: 1, name: 'A user' } }

hasMany association

// .getValues() - UserId is repeated as id and Tasks[].UserId
{ id: 1, name: 'A user', Tasks: [ { UserId: 1, name: 'A task' } ] }
// .getValuesDedup() - Tasks[].UserId is removed
{ id: 1, name: 'A user', Tasks: [ { name: 'A task' } ] }

belongsToMany association

// .getValues()
//   - UserId is repeated as id and Tasks[].UserTask.UserId
//   - TaskId is repeated as Tasks[].id and Tasks[].UserTask.TaskId
{ id: 1, name: 'A user', Tasks: [ { id: 2, name: 'A task', UserTask: { UserId: 1, TaskId: 2 } } ] }
// .getValuesDedup() - Tasks[].UserTask is removed
{ id: 1, name: 'A user', Tasks: [ { id: 2, name: 'A task' } ] }

Sequelize.getValuesDedup(input)

Same as Sequelize.getValues(input), but with data de-duplication as per Instance#getValuesDedup().

Tests

Use npm test to run the tests. Use npm run cover to check coverage. Requires a database called 'sequelize_test' and a db user 'sequelize_test' with no password.

Changelog

See changelog.md

Issues

If you discover a bug, please raise an issue on Github. https://github.com/overlookmotel/sequelize-values/issues

Contribution

Pull requests are very welcome. Please:

• ensure all tests pass before submitting PR
• add an entry to changelog
• add tests for new features
• document new functionality/API additions in README