What's my version?

[softwaregravy]

I'm not sure if this is a feature request or a help request.

I've decided to use versionist for my api routing and active_model_serializers to manage my presentation of my objects in the json object. I'm using https://github.com/hookercookerman/active_model_version_serializers so that I can version my model serialization (no context with that gem needed to understand this issue).

I have a common base class for all my controllers of a given version, and right now it looks like this:

class Api::V20130701::BaseController < Api::ApiController
  def default_serializer_options
    {version: :V20130701}
  end 
end

The version arg there tells active_model_version_serializers what version to use unless told otherwise. It matches my version from my routes file.

I would love to be able to get the current versionist module from the request somehow. I would like to get this from a standard place. That is agnostic to what options I've set up versionist with (header vs url param).

As an example, I'd be able to do something like:

class Api::V20130701::BaseController < Api::ApiController
  def default_serializer_options
    {version: api_version}
  end 
end

Where api_version is a helper method added to ActionController::Base. I'm pretty indifferent to the mechanism used (params? env?), but I would like to get the version of the current request.

Thanks,

Adding routes.rb snippet just in case:

  namespace :api do  
    api_version(:module => "V20130701", 
                :header => {:name => "API-VERSION", :value => "20130701"}, 
                :defaults => {:format => "json"}, 
                :default => true) do

[bploetz]

Where do you need this version, and why? The example you give above is in your BaseController, but if that controller gets called, you know your version: it's the version of that controller (V20130701 in the example).

Let me know....

[softwaregravy]

More of a code-duplication thought.

If I could pull it out of the request and not hard-code it, then I could define the versions in one place -- the routes file. It's just another moving piece that would be nice to remove.

[dan-corneanu]

Was there any resolution on this issue?

[bploetz]

@dan-corneanu Not really. I think it would be trivial to add something like this, but I'm still curious as to the use cases where you'd need this.

[softwaregravy]

The goal was just not to have the String in the routes file, and also in the class. It's a minor point, but requires having the same string in a couple of places.

It's been a long time since I opened this. Since I never followed up answering Brian's very prompt response to my original question, it must not have been that important.

(But I will add a thank you to @bploetz for providing the package and maintaining it)