Павел Грудинкин

config.action_dispatch.default_headers.merge!({
  'Access-Control-Allow-Origin' => '*',
  'Access-Control-Request-Method' => '*'
})

constraints(Subdomain) do
  post 'action_second/create', to: 'controller#create'
end

constraints :subdomain => '' do
  post 'action_first/create', to: 'controller#create'
end

class Subdomain
  def self.matches?(request)
    request.subdomain.present?
  end
end

date = "2016-06-28"
@posts = Post.where(user_id: 123).includes(:comments).where("(comments.created_at BETWEEN ? AND ?) OR (comments.updated_at BETWEEN ? AND ?)", date, date.next, date ,date.next).references(:comments)

array_of_hashes.sort_by { |hsh| hsh[:zip] }.reverse