Rails Postgis & GEOS

I am trying to get a Rails app with a Postgres/Postgis db with Geos working and I am not able to do so. I found this link:

That eventually led me here:

Libgeos is installed:

circleci@8e954f13d764:~/project$ sudo apt list | grep libgeos

WARNING: apt does not have a stable CLI interface. Use with caution in scripts.

libgeos++-dev/oldstable,now 3.5.1-3 amd64 [installed]
libgeos-3.5.1/oldstable,now 3.5.1-3 amd64 [installed,automatic]
libgeos-c1v5/oldstable,now 3.5.1-3 amd64 [installed,automatic]
libgeos-dbg/oldstable 3.5.1-3 amd64
libgeos-dev/oldstable,now 3.5.1-3 amd64 [installed]
libgeos-doc/oldstable 3.5.1-3 all

But ultimately my issue is the same:

[1] pry(main)> RGeo::Geos.supported?
=> false

The interesting thing about my setup is that we are using a remote database - it’s a static database containing Who’s On First location data, and we know for a fact that extension is working on that db because it’s been configured correctly. The trouble here is that RGeo doesn’t know that, and we need the libraries for it to work to be installed locally so the local gem can communicate with the remote server.

Here’s my config.yml.

version: 2.1
  ruby: circleci/ruby@1.1.0
  node: circleci/node@3.0.1
      - image: circleci/ruby:2.6.5-stretch-node-browsers
      - image: circleci/postgres:11.6-postgis-ram # Do I even need this, since I'm not creating a db locally?
      - image: circleci/mysql:8.0.21-ram
        command: [--default_authentication_plugin=mysql_native_password]
          MYSQL_ROOT_HOST: "%"
      - image: circleci/redis:6.0.6
      RAILS_ENV: test
    executor: ruby/default
      - checkout
      - run:
          name: Install postgis stuff
          command: |
            sudo apt-get install libgeos-dev
            sudo apt-get install libgeos++-dev
            sudo apt-get install libproj-dev
      - run:
          name: Install dockerize
          command: wget https://github.com/jwilder/dockerize/releases/download/$DOCKERIZE_VERSION/dockerize-linux-amd64-$DOCKERIZE_VERSION.tar.gz && sudo tar -C /usr/local/bin -xzvf dockerize-linux-amd64-$DOCKERIZE_VERSION.tar.gz && rm dockerize-linux-amd64-$DOCKERIZE_VERSION.tar.gz
            DOCKERIZE_VERSION: v0.3.0
      - ruby/install-deps
      - run:
          name: Which bundler?
          command: bundle -v
      - run:
          name: Waiting for MySQL to be ready
          command: dockerize -wait tcp://localhost:3306 -timeout 1m
      - run:
          name: Waiting for PostgreSQL to be ready
          command: dockerize -wait tcp://localhost:5432 -timeout 1m
      - run:
          name: Waiting for Redis to be ready
          command: dockerize -wait tcp://localhost:6379 -timeout 1m
      - run:
          name: Create DB
          command: bundle exec rails db:create --trace
      - run:
          name: Load DB schema
          command: bundle exec rails db:schema:load --trace
      - node/install-packages:
          pkg-manager: yarn
      - restore_cache:
            - packs-test-cache-v1
      - run:
          name: Compile Webpack
          command: bin/webpack
      - save_cache:
          key: packs-test-cache-v1
            - public/packs-test
      - ruby/rubocop-check
      - ruby/rspec-test
  version: 2
      - test

I’ll keep digging and see if I can find anything that works.

For my particular situation it turns out we didn’t need the Postgis image at all since we’re not creating a local database.

I did add this into my Gemfile:

group :test do
  # Other gems
  gem "ffi-geos" if ENV["CIRCLECI"]

That appears to at least get Geos working, but ideally we’d use the C API instead of FFI as it’s certainly faster.