Development environment

Important: The Bulletin Board depends on the existence of a Decidim installation.

To start working with the Bulletin Board you will need to install all the dependencies for the server.


  • Ruby version: 2.6

  • Rails version: 6

  • Python version: 3.8.2

System dependencies

  • Python gmpy2 package dependencies: libgmp, libmpfr and libmpc


Clone the repository, enter into the new folder and setup the application:

git clone
cd decidim-bulletin-board/server
bundle install
npm install

Now, you should setup your database:

bin/rails db:create db:migrate db:seed

This will also create some default data so you can start testing the app.

This data won’t be created in production environments, if you still want to do it, run: $ SEED=true rails db:setup.

To install the python wrappers for ElectionGuard, run:


Now, you can start your server!

bin/rails s

Visit http://localhost:8000 to see your app running or http://localhost:8000/sandbox/elections to test the voting process. On http://localhost:8000/api/graphiql, you can access the GraphiQL, an in-browser IDE to explore GraphQL APIs.

Further configuration

For further development, check the commands docs.

Helpful: This application includes Visual Studio Code Dev Containers to simplify the environment setup.