如何向此哈希添加“方法”？

Question

I'm writing a custom OAuth2 strategy. I need to add an expired? method to the hash response and I'm not sure how to do it. The response I'm getting gives me a time until expiry but not the expired method itself.

I need to add an expired? method to it, not sure how. Any help?

Answer 1

Instead of using a Hash directly, you could create a new class in build_access_token that extends it.

class AccessToken < Hash

  def initialize response_hash
    # This overrides the default behavior, you don't care here.
    # But if you do, just remove this and call merge manually.
    self.merge!(response_hash)
  end

  def expired?
    # return true if expired, false otherwise
  end

end

Then, in build_access_token, do something like:

token = AccessToken.new response_hash

Now, your object is not just Hash , but your "super-hash" AccessToken . You could attach other methods as needed.

Further down the line, you could change this to take a "whitelisting" approach as well, taking a Hash in your constructor, only exposing the elements of that Hash that you want to expose to consumers via methods, and removing the Hash extension. But the above should do you for now.