How to store array on a cookie rails 4?

Question

I am trying to store an array on rails an getting error on the decoding. I use cookies[:test] = Array.new And when I am trying to decode @test = ActiveSupp

Answer 1

When writing to the cookie I usually convert the array to a string.

def save_options(options)
  cookies[:options] = (options.class == Array) ? options.join(',') : ''
end

Then I convert back into an array when reading the cookie.

def options_array
  cookies[:options] ? cookies[:options].split(",") : []
end

I'm not sure if this is "the right way" but it works well for me.