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CONTRIBUTING.md

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Issues

Issues are always very welcome - after all, they are a big part of making sequelize better. However, there are a couple of things you can do to make the lives of the developers much, much easier:

Tell us:

  • What you are doing?
    • Post a minimal code sample that reproduces the issue, including models and associations
    • What do you expect to happen?
    • What is actually happening?
  • Which dialect you are using?
  • Which sequelize version you are using?

When you post code, please use Github flavored markdown, in order to get proper syntax highlighting!

If you can even provide a pull request with a failing unit test, we will love you long time! Plus your issue will likely be fixed much faster.

Pull requests

We're glad to get pull request if any functionality is missing or something is buggy. However, there are a couple of things you can do to make life easier for the maintainers:

  • Explain the issue that your PR is solving - or link to an existing issue
  • Make sure that all existing tests pass
  • Add some tests for your new functionality or a test exhibiting the bug you are solving. Ideally all new tests should not pass without your changes.
    • Use promise style in all new tests. Specifically this means:
      • don't use EventEmitter, QueryChainer or the success, done and error events
      • don't use nested callbacks (use Promise.bind to maintain context in promise chains)
      • don't use a done callback in your test, just return the promise chain.
    • Small bugfixes and direct backports to the 1.7 branch are accepted without tests.
  • If you are adding to / changing the public API, remember to add API docs, in the form of JSDoc style comments. See section 4a for the specifics.
  • Add an entry to the changelog, with a link to the issue you are solving

Still interested? Coolio! Here is how to get started:

1. Prepare your environment

Here comes a little surprise: You need Node.JS. In order to be a productive developer, I would recommend the latest v0.10.

2. Install the dependencies

Just "cd" into sequelize directory and run npm install, see an example below:

$ cd path/to/sequelize
$ npm install

3. Database... Come to me!

For MySQL and PostgreSQL you'll need to create a DB called sequelize_test. For MySQL this would look like this:

$ echo "CREATE DATABASE sequelize_test;" | mysql -uroot

CLEVER NOTE: by default, your local MySQL install must be with username root without password. If you want to customize that, you can set the environment variables SEQ_DB, SEQ_USER, SEQ_PW, SEQ_HOST and SEQ_PORT.

For Postgres, creating the database and (optionally) adding the test user this would look like:

$ psql
# create database sequelize_test;
# create user postgres with superuser;

AND ONE LAST THING: Once npm install worked for you (see below), you'll get SQLite tests for free :)

3a. Docker

If you don't feel like setting up databases and users, you can use our docker image for sequelize contribution.

Getting the image:

$ sudo docker pull mhansen/sequelize-contribution

Start the container and save references to container id and ip:

$ CONTAINER=$(sudo docker run -d -i -t mhansen/sequelize-contribution)
$ CONTAINER_IP=$(sudo docker inspect -format='{{.NetworkSettings.IPAddress}}' $CONTAINER)

Run tests:

$ SEQ_HOST=$CONTAINER_IP SEQ_USER=sequelize_test make all

Stop the container:

$ sudo docker stop $CONTAINER

When running tests repeatedly, you only need to redo step 3 if you haven't stopped the container.

3b. Docker and OSX:

Docker does not run on OSX natively so you will have to use an VM layer like boot2docker. See OSX Docker Documentation for install or you can also use Homebrew to install boot2docker after installing VirtualBox

After installing and intializing docker you can pull the docker container:

$ boot2docker up
Waiting for VM and Docker daemon to start...
......
Started.

To connect the Docker client to the Docker daemon, please set:
    export DOCKER_HOST=tcp://192.168.59.103:2375

$ export DOCKER_HOST=tcp://192.168.59.103:2375
$ docker pull mhansen/sequelize-contribution

And then setup and run the tests:

$ CONTAINER=$(docker run -d -i -t mhansen/sequelize-contribution)
$ CONTAINER_IP=$(docker inspect --format='{{.NetworkSettings.IPAddress}}' $CONTAINER)
$ SEQ_HOST=$CONTAINER_IP SEQ_USER=sequelize_test make all

These are the same commands as above, although sudo is not required.

When you are done with your testing:

$ boot2docker down

4. Run the tests

All tests are located in the test folder (which contains the lovely Mocha tests).

$ make all || mysql || sqlite || pgsql || postgres || mariadb || postgres-native

$ # alternatively you can pass database credentials with $variables when testing
$ DIALECT=dialect SEQ_DB=database SEQ_USER=user SEQ_PW=password make test

4a. Check the documentation

This step only applies if you have actually changed something in the documentation. To generate documentation for the sequelize.js file, run (in the sequelize dir)

$ node docs/markdox.js --file lib/sequelize.js

The generated documentation will be placed in docs/tmp.md.

5. That's all

Just commit and send your pull request. Happy hacking and thank you for contributing.

6. Some words about coding style

Have a look at our .jshintrc file for the specifics. As part of the test process, all files will be linted, and your PR will not be accepted if it does not pass linting.

6.1. Spaces

Use spaces when defining functions.

function(arg1, arg2, arg3) {
  return 1;
}

Use spaces for if statements.

if (condition) {
  // do something
} else {
  // something else
}

6.2. Variable declarations

var num  = 1
  , user = new User()
  , date = new Date();

6.3. Semicolons

Yes