Contributions are welcome, and they are greatly appreciated! Every little bit helps, and credit will always be given.

You can contribute in many ways:

Types of Contributions

Report Bugs

Report bugs at

If you are reporting a bug, please include:

  • Your operating system name and version.

  • Any details about your local setup that might be helpful in troubleshooting.

  • Detailed steps to reproduce the bug.

Fix Bugs

Look through the GitHub issues for bugs. Anything tagged with “bug” and “help wanted” is open to whoever wants to implement it.

Implement Features

Look through the GitHub issues for features. Anything tagged with “enhancement” and “help wanted” is open to whoever wants to implement it.

Write Documentation

GINO could always use more documentation, whether as part of the official GINO docs, in docstrings, or even on the web in blog posts, articles, and such.

Submit Feedback

The best way to send feedback is to file an issue at

If you are proposing a feature:

  • Explain in detail how it would work.

  • Keep the scope as narrow as possible, to make it easier to implement.

  • Remember that this is a volunteer-driven project, and that contributions are welcome :)

Get Started!

Ready to contribute? Here’s how to set up gino for local development.

  1. Fork the gino repo on GitHub.

  2. Clone your fork locally:

    $ git clone
  3. Create a branch for local development:

    $ cd gino/
    $ git checkout -b name-of-your-bugfix-or-feature

Now you can make your changes locally.

  1. Create virtual environment. Example for virtualenvwrapper:

    $ mkvirtualenv gino
  2. Activate the environment and install requirements:

    $ pip install -r requirements_dev.txt
  3. When you’re done making changes, check that your changes pass syntax checks:

    $ flake8 gino tests

7. And tests (including other Python versions with tox). For tests you you will need running database server (see “Tips” section below for configuration details):

$ pytest tests
$ tox
  1. For docs run:

    $ make docs

It will build and open up docs in your browser.

  1. Commit your changes and push your branch to GitHub:

    $ git add .
    $ git commit -m "Your detailed description of your changes."
    $ git push origin name-of-your-bugfix-or-feature
  2. Submit a pull request through the GitHub website.

Pull Request Guidelines

Before you submit a pull request, check that it meets these guidelines:

  1. The pull request should include tests.

  2. If the pull request adds functionality, the docs should be updated. Put your new functionality into a function with a docstring, and add the feature to the list in README.rst.

  3. The pull request should work for Python 3.5, 3.6, 3.7 and 3.8. Check and make sure that the tests pass for all supported Python versions.


To run a subset of tests:

$ py.test -svx tests.test_gino

By default the tests run against a default installed postgres database. If you wish to run against a separate database for the tests you can do this by first creating a new database and user using ‘psql’ or similar:


Then run the tests like so:

$ export DB_USER=gino DB_PASS=gino DB_NAME=gino
$ py.test

Here is an example for db server in docker. Some tests require ssl so you will need to run postgres with ssl enabled. Terminal 1 (server):

$ openssl req -new -text -passout pass:abcd -subj /CN=localhost -out server.req -keyout privkey.pem
$ openssl rsa -in privkey.pem -passin pass:abcd -out server.key
$ openssl req -x509 -in server.req -text -key server.key -out server.crt
$ chmod 600 server.key
$ docker run --name gino_db --rm -it -p 5433:5432 -v "$(pwd)/server.crt:/var/lib/postgresql/server.crt:ro" -v "$(pwd)/server.key:/var/lib/postgresql/server.key:ro" postgres:12-alpine -c ssl=on -c ssl_cert_file=/var/lib/postgresql/server.crt -c ssl_key_file=/var/lib/postgresql/server.key

Terminal 2 (client):

$ export DB_USER=gino DB_PASS=gino DB_NAME=gino DB_PORT=5433
$ docker exec gino_db psql -U postgres -c "CREATE ROLE $DB_USER WITH LOGIN ENCRYPTED PASSWORD '$DB_PASS'"
$ docker exec gino_db psql -U postgres -c "CREATE DATABASE $DB_NAME WITH OWNER = $DB_USER;"
$ pytest tests/