# Contributing to REST framework

> The world can only really be changed one piece at a time.  The art is picking that piece.
>
> &mdash; [Tim Berners-Lee][cite]

!!! note

    At this point in its lifespan we consider Django REST framework to be feature-complete. We focus on pull requests that track the continued development of Django versions, and generally do not accept new features or code formatting changes.

## Community

The most important thing you can do to help push the REST framework project forward is to be actively involved wherever possible.  Code contributions are often overvalued as being the primary way to get involved in a project, we don't believe that needs to be the case.

If you use REST framework, we'd love you to be vocal about your experiences with it - you might consider writing a blog post about using REST framework, or publishing a tutorial about building a project with a particular JavaScript framework.  Experiences from beginners can be particularly helpful because you'll be in the best position to assess which bits of REST framework are more difficult to understand and work with.

Other really great ways you can help move the community forward include helping to answer questions on the [discussion group][google-group], or setting up an [email alert on StackOverflow][so-filter] so that you get notified of any new questions with the `django-rest-framework` tag.

When answering questions make sure to help future contributors find their way around by hyperlinking wherever possible to related threads and tickets, and include backlinks from those items if relevant.

## Code of conduct

Please keep the tone polite & professional.  For some users a discussion on the REST framework mailing list or ticket tracker may be their first engagement with the open source community.  First impressions count, so let's try to make everyone feel welcome.

Be mindful in the language you choose.  As an example, in an environment that is heavily male-dominated, posts that start 'Hey guys,' can come across as unintentionally exclusive.  It's just as easy, and more inclusive to use gender neutral language in those situations.

The [Django code of conduct][code-of-conduct] gives a fuller set of guidelines for participating in community forums.

# Issues

* Django REST framework is considered feature-complete. Please do not file requests to change behavior, unless it is required for security reasons or to maintain compatibility with upcoming Django or Python versions.
* Feature requests will typically be closed with a recommendation that they be implemented outside the core REST framework library (e.g. as third-party libraries).  This approach allows us to keep down the maintenance overhead of REST framework, so that the focus can be on continued stability and great documentation.

# Development

To start developing on Django REST framework, first create a Fork from the
[Django REST Framework repo][repo] on GitHub.

Then clone your fork. The clone command will look like this, with your GitHub
username instead of YOUR-USERNAME:

    git clone https://github.com/YOUR-USERNAME/django-rest-framework

See GitHub's [_Fork a Repo_][how-to-fork] Guide for more help.

Changes should broadly follow the [PEP 8][pep-8] style conventions, and we recommend you set up your editor to automatically indicate non-conforming styles.
You can check your contributions against these conventions each time you commit using the [pre-commit](https://pre-commit.com/) hooks, which we also run on CI.
To set them up, first ensure you have the pre-commit tool installed, for example:

    python -m pip install pre-commit

Then run:

    pre-commit install

## Testing

To run the tests, clone the repository, and then:

    # Setup the virtual environment
    python3 -m venv env
    source env/bin/activate
    pip install -e .
    pip install -r requirements.txt

    # Run the tests
    ./runtests.py

### Test options

Run using a more concise output style.

    ./runtests.py -q

Run the tests for a given test case.

    ./runtests.py MyTestCase

Run the tests for a given test method.

    ./runtests.py MyTestCase.test_this_method

Shorter form to run the tests for a given test method.

    ./runtests.py test_this_method

Note: The test case and test method matching is fuzzy and will sometimes run other tests that contain a partial string match to the given  command line input.

### Running against multiple environments

You can also use the excellent [tox][tox] testing tool to run the tests against all supported versions of Python and Django.  Install `tox` globally, and then simply run:

    tox

## Pull requests

It's a good idea to make pull requests early on.  A pull request represents the start of a discussion, and doesn't necessarily need to be the final, finished submission.

It's also always best to make a new branch before starting work on a pull request.  This means that you'll be able to later switch back to working on another separate issue without interfering with an ongoing pull requests.

It's also useful to remember that if you have an outstanding pull request then pushing new commits to your GitHub repo will also automatically update the pull requests.

GitHub's documentation for working on pull requests is [available here][pull-requests].

Always run the tests before submitting pull requests, and ideally run `tox` in order to check that your modifications are compatible on all supported versions of Python and Django.

Once you've made a pull request take a look at the build status in the GitHub interface and make sure the tests are running as you'd expect.

![Build status][build-status]

*Above: build notifications*

## Managing compatibility issues

Sometimes, in order to ensure your code works on various different versions of Django, Python or third party libraries, you'll need to run slightly different code depending on the environment.  Any code that branches in this way should be isolated into the `compat.py` module, and should provide a single common interface that the rest of the codebase can use.

# Documentation

The documentation for REST framework is built from the [Markdown][markdown] source files in [the docs directory][docs].

There are many great Markdown editors that make working with the documentation really easy.  The [Mou editor for Mac][mou] is one such editor that comes highly recommended.

## Building the documentation

To build the documentation, install MkDocs with `pip install mkdocs` and then run the following command.

    mkdocs build

This will build the documentation into the `site` directory.

You can build the documentation and open a preview in a browser window by using the `serve` command.

    mkdocs serve

## Language style

Documentation should be in American English.  The tone of the documentation is very important - try to stick to a simple, plain, objective and well-balanced style where possible.

Some other tips:

* Keep paragraphs reasonably short.
* Don't use abbreviations such as 'e.g.' but instead use the long form, such as 'For example'.

## Markdown style

There are a couple of conventions you should follow when working on the documentation.

##### 1. Headers

Headers should use the hash style.  For example:

    ### Some important topic

The underline style should not be used.  **Don't do this:**

    Some important topic
    ====================

##### 2. Links

Links should always use the reference style, with the referenced hyperlinks kept at the end of the document.

    Here is a link to [some other thing][other-thing].

    More text...

    [other-thing]: http://example.com/other/thing

This style helps keep the documentation source consistent and readable.

If you are hyperlinking to another REST framework document, you should use a relative link, and link to the `.md` suffix.  For example:

    [authentication]: ../api-guide/authentication.md

Linking in this style means you'll be able to click the hyperlink in your Markdown editor to open the referenced document.  When the documentation is built, these links will be converted into regular links to HTML pages.

##### 3. Notes

If you want to draw attention to a note or warning, use a pair of enclosing lines, like so:

    ---

    **Note:** A useful documentation note.

    ---


[cite]: https://www.w3.org/People/Berners-Lee/FAQ.html
[code-of-conduct]: https://www.djangoproject.com/conduct/
[google-group]: https://groups.google.com/forum/?fromgroups#!forum/django-rest-framework
[so-filter]: https://stackexchange.com/filters/66475/rest-framework
[pep-8]: https://www.python.org/dev/peps/pep-0008/
[build-status]: ../img/build-status.png
[pull-requests]: https://help.github.com/articles/using-pull-requests
[tox]: https://tox.readthedocs.io/en/latest/
[markdown]: https://daringfireball.net/projects/markdown/basics
[docs]: https://github.com/encode/django-rest-framework/tree/master/docs
[mou]: http://mouapp.com/
[repo]: https://github.com/encode/django-rest-framework
[how-to-fork]: https://help.github.com/articles/fork-a-repo/
