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dcus2019sprints

Notes for "Getting started contributing to Django" sprints workshop.

Django's contributing guide

The canonical docs here are the Contributing Guide. The link there is to the index page. There's a lot to it! Explore.

Three good starting points are:

The last one there is a good Quickstart.

Getting set up with the code

The goals is to get Django source code and be able to run the test suite.

  1. Fork the main django/django repo on GitHub
  2. git clone your fork. — You've now got Django's source code on your laptop. 💃
  3. Create a virtual environment.
  4. Install Django as editable: pip install -e .
  5. Install the test requirements. cd tests && pip install -r requirements/py3.txt
  6. Run the tests. ./runtests.py

This should run the tests locally against SQLite. They should pass.

If you have difficulties installing the requirements, there may be missing dependencies and such. We'll have to look into those. Reach out.

On macoOS?: you may need to set an environment variable to run the tests:

export OBJC_DISABLE_INITIALIZE_FORK_SAFETY=YES

Using Docker

An alternative is to use Docker. We have a django-docker-box project for that.

This option is particularly good if you want to work on the ORM, because it lets you test against all the supported DBs.

Finding a ticket

Django uses Trac for issues and GitHub for PRs.

<code.djangoproject.com>

Trac is a bit different from GitHub Issues. It's more powerful, and it has the history from the many years of Django's history.

It can seem a bit intimidating, but a after a few minutes exploring it's starts to make sense. (Hopefully anyway… 🙂)

  • Visit https://code.djangoproject.com/query — It will show all open tickets. Some 1300-odd. That's too many. We need to filter if we're going to get anywhere.

  • Visit https://dashboard.djangoproject.com — this shows some number and the titles link back to trac (or sometimes GitHub) with the matching filters already in place.

  • Click on "Easy" tickets — these are tickets that have been marked as easy pickings. We don't have many of them so marked. (We should be a bit more liberal with this…) But if they're not assigned, or are assigned but haven't been updated in months, they might be a good place to start.

  • Filter by component: Go back to the full View tickets list. In the Custom query section click on the And select and pick Component. This will add a drop down to just show tickets for a single component. Click a few. See.

    • The ORM and the Admin have the most tickets.
    • Other components have much less, so are easier to get to grips with.

Here's a graph showing it:

Open Accepted tickets on Django by component

The numbers may be slightly outdated but the ordering and relative scale will be about right.

Documentation tickets are another good place to look. There's a lot of them. They're a great way to learn, since you need to really understand an issue in order to be able to state clearly what's happening in the docs.

When you look at a ticket, you won't understand it instantly. It takes a bit of time to dig in and work out what's going on. That's true for everyone, fellows, veteran contributors and newcomers alike.

But most tickets aren't any harder than the problems you solve every day with Django. They just need time and energy.

Here's a filter for Needs Documentation. There's a hundred or so.

Many of these have patches but are stuck needing clearer documentation. Again, this can be a good place to come in and help finish a PR off.

One final place to look, is on GitHub at the open PRs. Sort by Least Recently Updated. How come a PR hasn't been closed but hasn't been worked on either. These may be towards the more challenging end — or it may be the Needs Documentation type issue that we just saw — but can you find a PR to help finish off here?

Beyond that, it's a question of finding a ticket, and digging in. It's hard to say too much generally — it depends on which ticket you find.

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