Active Resource 6 breaking change: can't share common headers anymore #376
Description
After PR #359 (I guess) has been merged, we can't define common headers on base classes and make them available to subclasses, as expected.
This way, each subclass must configure the same access token, for example, instead of using parent access token, which would not be very DRY.
Please take a look on following sample code (using fruits and apples just like ARes test cases).
# 5.1
fruit = Class.new(ActiveResource::Base)
apple = Class.new(fruit)
fruit.headers["key"] = "fruit-value"
fruit.headers # => {"key"=>"fruit-value"}
apple.headers # => {"key"=>"fruit-value"}
# 6.0
fruit = Class.new(ActiveResource::Base)
apple = Class.new(fruit)
fruit.headers["key"] = "fruit-value"
fruit.headers # => {"key"=>"fruit-value"}
apple.headers # => {}
Please note that if key was access token, for example, then subclasses couldn't get authorized, since apple.headers is empty.