Adds soft purging from fastly-ruby client

[gschorkopf]

• Includes soft_purge, soft_purge_all class/instance methods within ActiveRecord. Useful for callbacks, or calling on an instance of an ActiveRecord model

Concerns:

• Do we want to include same functionality for Mongoid?
• This all hinges on the fact that the client method is well tested
• Ideally, I'd rather use keyword args, but that's not very well backwards compatible with old rubies

[blithe]

I would make this a 0.7.0 bump since we are adding new methods now. (I know I said the opposite yesterday but that was before the new features.)

[gschorkopf]

Changed, git history updated.

[blithe]

One minor comment about the versioning but this LGTM. 👍

[lanej]

👍

[samratjp]

Hey guys!

Thanks for merging this. Previously I was using the ruby client to soft purge and now wanted to take full advantage of the Rails gem and just tried it out with 0.7.0. I tried soft purge on an ActiveRecord model and it didn't work and got this instead:

ArgumentError: wrong number of arguments (2 for 1)
  from /Users/my_username_redacted/.rvm/gems/ruby-2.2.2@maker/gems/fastly-rails-0.7.0/lib/fastly-rails/client.rb:11:in `purge_by_key'
  from /Users/my_username_redacted/.rvm/gems/ruby-2.2.2@maker/gems/fastly-rails-0.7.0/lib/fastly-rails.rb:26:in `purge_by_key'
  from /Users/my_username_redacted/.rvm/gems/ruby-2.2.2@maker/gems/fastly-rails-0.7.0/lib/fastly-rails/active_record/surrogate_key.rb:41:in `soft_purge'
  from (irb):7
  from /Users/my_username_redacted/.rvm/gems/ruby-2.2.2@maker/gems/railties-4.2.4/lib/rails/commands/console.rb:110:in `start'
  from /Users/my_username_redacted/.rvm/gems/ruby-2.2.2@maker/gems/railties-4.2.4/lib/rails/commands/console.rb:9:in `start'
  from /Users/my_username_redacted/.rvm/gems/ruby-2.2.2@maker/gems/railties-4.2.4/lib/rails/commands/commands_tasks.rb:68:in `console'
  from /Users/my_username_redacted/.rvm/gems/ruby-2.2.2@maker/gems/railties-4.2.4/lib/rails/commands/commands_tasks.rb:39:in `run_command!'
  from /Users/my_username_redacted/.rvm/gems/ruby-2.2.2@maker/gems/railties-4.2.4/lib/rails/commands.rb:17:in `<top (required)>'
  from bin/rails:4:in `require'
  from bin/rails:4:in `<main>'

I'm on Rails 4.2.4 + Ruby 2.2.2. Fwiw, I was previously doing this before the soft_purge support:

FastlyRails.client.get_service(ENV.fetch("FASTLY_SERVICE_ID")).purge_by_key(some_object.record_key, true) 

Thanks,
Sam

[lanej]

@samratjp let's bring this over to an issue and work it out.