:to_ary fun

to_ary.rb

# If you put a DSL stub object like this inside an array and call array#flatten without
# being sure to call super on :to_ary, you get fun stuff like this:
# can't convert Squeel::Nodes::Stub to Array 
# (Squeel::Nodes::Stub#to_ary gives Squeel::Nodes::KeyPath)
def method_missing(method_id, *args)
  super if method_id == :to_ary
  if args.empty?
    KeyPath.new(self, method_id)
  elsif (args.size == 1) && (Class === args[0])
    KeyPath.new(self, Join.new(method_id, Arel::InnerJoin, args[0]))
  else
    KeyPath.new(self, Nodes::Function.new(method_id, args))
  end
end