discourse/docs/TROUBLESHOOTING.md

Troubleshooting issues with Discourse environments

Are you having trouble setting up Discourse? Here are some basic things to check before
reaching out to the community for help:

1. Are you running Ruby 2.4 or later?

   Discourse is designed for Ruby 2.4 or later. We recommend 2.4.4 p296 or later. You can check your version by typing
   ruby -v and checking the response.

2. Are you on Postgres 10 or later with HSTORE enabled?

   You can check your postgres version by typing psql --version. To see if hstore is
   installed, open a session to postgres and type \dx and see if hstore is listed.

3. Have you run bundle install?

   We frequently update our dependencies to newer versions. It is a good idea to run
   bundle install every time you check out Discourse, especially if it's been a while.

4. Did you run bundle update?

   Don't. Running bundle update will download gem versions that we haven't tested with.
   The Gemfile.lock has the gem versions that Discourse currently uses, so bundle install
   will work. If you ran update, then you should uninstall the gems, run
   git checkout -- Gemfile.lock and then run bundle install.

5. Have you migrated your database?

   Our schema changes fairly frequently. After checking out the source code, you should
   run bundle exec rake db:migrate && RAILS_ENV=test bundle exec rake db:migrate

6. Do the tests pass?

   If you are having other problems, it's useful to know if the test suite passes. You
   can run it by first using RAILS_ENV=test bundle exec rake db:drop db:create db:migrate and then bundle exec rspec. If you
   experience any failures, that's a bad sign! Our master branch should always pass
   every test.

7. Have you updated host_names in your database.yml?

   If links in emails have localhost in them, then you are still using the default host_names
   value in database.yml. Update it to use your site's host name(s).

8. Are you having problems bundling:

ArgumentError: invalid byte sequence in US-ASCII
An error occurred while installing active_model_serializers (0.7.0), and Bundler cannot continue.
Make sure that `gem install active_model_serializers -v '0.7.0'` succeeds before bundling.

Try this in console:

$ export LANG="en_US.UTF-8"
$ export LC_ALL="en_US.UTF-8"

And/or this in top of Gemfile:

if RUBY_VERSION =~ /1.9/
Encoding.default_external = Encoding::UTF_8
Encoding.default_internal = Encoding::UTF_8
end