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Bookshelf is a JavaScript ORM for Node.js, built on the Knex SQL query builder. It features both Promise-based and traditional callback interfaces, transaction support, eager/nested-eager relation loading, polymorphic associations, and support for one-to-one, one-to-many, and many-to-many relations.
It is designed to work with PostgreSQL, MySQL, and SQLite3.
Website and documentation. The project is hosted on GitHub, and has a comprehensive test suite.
Introduction
Bookshelf aims to provide a simple library for common tasks when querying databases in JavaScript, and forming relations between these objects, taking a lot of ideas from the Data Mapper Pattern.
With a concise, literate codebase, Bookshelf is simple to read, understand, and extend. It doesn't force you to use any specific validation scheme, and provides flexible, efficient relation/nested-relation loading and first-class transaction support.
It's a lean object-relational mapper, allowing you to drop down to the raw Knex interface whenever you need a custom query that doesn't quite fit with the stock conventions.
Installation
You'll need to install a copy of Knex, and either
mysql
, pg
, or sqlite3
from npm.Dockshelf 1 3 1 3 As A Fraction
The Bookshelf library is initialized by passing an initialized Knex client instance. The Knex documentation provides a number of examples for different databases.
This initialization should likely only ever happen once in your application. As it creates a connection pool for the current database, you should use the
bookshelf
instance returned throughout your library. You'll need to store this instance created by the initialize somewhere in the application so you can reference it. A common pattern to follow is to initialize the client in a module so you can easily reference it later:Examples
Here is an example to get you started:
Official Plugins
- Virtuals: Define virtual properties on your model to compute new values.
- Case Converter: Handles the conversion between the database's snake_cased and a model's camelCased properties automatically.
- Processor: Allows defining custom processor functions that handle transformation of values whenever they are
.set()
on a model.
Community plugins
- bookshelf-cascade-delete - Cascade delete related models on destroy.
- bookshelf-json-columns - Parse and stringify JSON columns on save and fetch instead of manually define hooks for each model (PostgreSQL and SQLite).
- bookshelf-mask - Similar to the functionality of the
Model#visible
attribute but supporting multiple scopes, masking models and collections using the json-mask API. - bookshelf-schema - A plugin for handling fields, relations, scopes and more.
- bookshelf-signals - A plugin that translates Bookshelf events to a central hub.
- bookshelf-paranoia - Protect your database from data loss by soft deleting your rows.
- bookshelf-uuid - Automatically generates UUIDs for your models.
- bookshelf-modelbase - An alternative to extend
Model
, adding timestamps, attribute validation and some native CRUD methods. - bookshelf-advanced-serialization - A more powerful visibility plugin, supporting serializing models and collections according to access permissions, application context, and after ensuring relations have been loaded.
- bookshelf-plugin-mode - Plugin inspired by the functionality of the
Model#visible
attribute, allowing to specify different modes with corresponding visible/hidden fields of model. - bookshelf-secure-password - A plugin for easily securing passwords using bcrypt.
- bookshelf-default-select - Enables default column selection for models. Inspired by the functionality of the
Model#visible
attribute, but operates on the database level. - bookshelf-ez-fetch - Convenient fetching methods which allow for compact filtering, relation selection and error handling.
- bookshelf-manager - Model & Collection manager to make it easy to create & save deep, nested JSON structures from API requests.
Support
Have questions about the library? Come join us in the #bookshelf freenode IRC channel for support on knex.js and bookshelf.js, or post an issue on Stack Overflow. How to play pubg pc for free.
Contributing
If you want to contribute to Bookshelf you'll usually want to report an issue or submit apull-request. For this purpose the online repository isavailable on GitHub.
For further help setting up your local development environment or learning how you can contribute toBookshelf you should read the Contributing documentavailable on GitHub.
F.A.Q.
Can I use standard node.js style callbacks?
Yes, you can call
.asCallback(function(err, resp) {
on any database operation method and use the standard (err, result)
style callback interface if you prefer.My relations don't seem to be loading, what's up?
Make sure to check that the type is correct for the initial parameters passed to the initial model being fetched. For example
new Model({id: '1'}).load([relations..])
will not return the same as new Model({id: 1}).load([relations..])
- notice that the id is a string in one case and a number in the other. This can be a common mistake if retrieving the id from a url parameter.This is only an issue if you're eager loading data with load without first fetching the original model.
new Model({id: '1'}).fetch({withRelated: [relations..]})
should work just fine.My process won't exit after my script is finished, why?
The issue here is that Knex, the database abstraction layer used by Bookshelf, uses connection pooling and thus keeps the database connection open. If you want your process to exit after your script has finished, you will have to call
.destroy(cb)
on the knex
property of your Bookshelf
instance or on the Knex
instance passed during initialization. More information about connection pooling can be found over at the Knex docs.How do I debug?
If you pass
debug: true
in the options object to your knex
initialize call, you can see all of the query calls being made. You can also pass that same option to all methods that access the database, like model.fetch()
or model.destroy()
. Examples:Sometimes you need to dive a bit further into the various calls and see what all is going on behind the scenes. You can use node-inspector, which allows you to debug code with
debugger
statements like you would in the browser.Bookshelf uses its own copy of the
bluebird
Promise library. You can read up here for more on debugging Promises.Adding the following block at the start of your application code will catch any errors not otherwise caught in the normal Promise chain handlers, which is very helpful in debugging:
How do I run the test suite?
Dockshelf 1 3 10
See the CONTRIBUTINGdocument on GitHub.
Can I use Bookshelf outside of Node.js?
While it primarily targets Node.js, all dependencies are browser compatible, and it could be adapted to work with other javascript environments supporting a sqlite3 database, by providing a custom Knex adapter. No such adapter exists though.
Which open-source projects are using Bookshelf?
Dockshelf 1 3 1 2 Equals
We found the following projects using Bookshelf, but there can be more:
Dockshelf 1 3 1 3 Equal
- Ghost (A blogging platform) uses bookshelf. [Link]
- Soapee (Soap Making Community and Resources) uses bookshelf. [Link]
- NodeZA (Node.js social platform for developers in South Africa) uses bookshelf. [Link]
- Sunday Cook (A social cooking event platform) uses bookshelf. [Link]
- FlyptoX (Open-source Node.js cryptocurrency exchange) uses bookshelf. [Link]
- And of course, everything on here use bookshelf too.