My config with steps to use solargraph for Rails projects in VS Code (WIP)

.solargraph.yml

---
include:
  - "app/**/*.rb"
  - "config/**/*.rb"
  - "lib/**/*.rb"
exclude:
  - spec/**/*
  - vendor/**/*
  - ".bundle/**/*"
require:
  - actionmailer
  - actionpack
  - actionview
  - activejob
  - activemodel
  - activerecord
  - activesupport
domains: []
reporters:
  - rubocop
  - require_not_found
  - typecheck
  - update_errors
formatter:
  rubocop:
    cops: safe
    except: []
    only: []
    extra_args: []
require_paths: []
plugins:
  - solargraph-rails
max_files: 5000

definitions.rb

# The following comments fill some of the gaps in Solargraph's understanding of
# Rails apps. Since they're all in YARD, they get mapped in Solargraph but
# ignored at runtime.
#
# @!parse
#   class ActionController::Base
#     include ActionController::MimeResponds
#     extend ActiveSupport::Callbacks::ClassMethods
#     extend AbstractController::Callbacks::ClassMethods
#   end
#   class ActiveRecord::Base
#     extend ActiveRecord::QueryMethods
#     extend ActiveRecord::FinderMethods
#     extend ActiveRecord::Associations::ClassMethods
#     extend ActiveRecord::Inheritance::ClassMethods
#     include ActiveRecord::Persistence
#   end
# @!override ActiveRecord::FinderMethods#find
#   @overload find(id)
#     @param id [Integer]
#     @return [self]
#   @overload find(list)
#     @param list [Array]
#     @return [Array<self>]
#   @overload find(*args)
#     @return [Array<self>]
#   @return [self, Array<self>]

solargraph_setup.md

• Install the Ruby Solargraph VS Code extension and configure to your projects bundler path.
• Run $ gem install solargraph solargraph-rails
• Update the Ruby Solargraph VS Code extension's command path to point to the abolute path of your solargraph install.
• In your Project root run $ solargraph config
  • Optional: Update the generated file with the config above (This is for my project YMMV)
• In your Project root run $ solargraph bundle
• Add the contents of this gist to your project (or see above). I keep mine in config/definitions.rb
• In your Project root run $ yard gems
• Restart VS Code
• Profit?

These steps are mostly from memory