A function to get information about an Active Record model in a Rails console session

reflect_on.rb

# Load this in a Rails console session with:
# play ~/Desktop/reflect_on.rb
def reflect_on(clazz)
  result = {
    column_names: clazz.column_names.sort,
    associations: clazz.reflect_on_all_associations.map(&:name).sort,
    class_methods: clazz.methods().find_all do |m_sym|
      m = clazz.method(m_sym)
      m.source_location && m.source_location[0].include?('/app/')
    end.sort,
    instance_methods: clazz.instance_methods().find_all do |m_sym|
      m = clazz.instance_method(m_sym)
      m.source_location && m.source_location[0].include?('/app/')
    end.sort
  }
  ap(result, index: false)
end