Allow strings as enum values

[s-mage]

Active Record 5 improved work with enums. So now we can use strings or symbols instead of integers. For example:

# ActiveRecord4Adapter
@ability.can :read, Shape, color: Shape.colors[:green]

# ActiveRecord5Adapter
@ability.can :read, Shape, color: :green

ActiveRecord5Adapter is compatible with ActiveRecord4Adapter so you can use numbers as well.

[Schwad]

@s-mage do you think these checks are failing for ruby 2.0 here because of your changes or has CanCanCan 2.0 dropped support for Ruby 2.0?

[Schwad]

As a fan of enums and Rails 5 I think this would be a handy addition!

[s-mage]

@Schwad https:/ruby/ruby/blob/ruby_2_3/NEWS I looked through the file and can't see anything incompatible in the diff, do you?

[s-mage]

@Schwad, I merged develop here and it started fail in the same rubies where develop fails

[coorasse]

How does it behave when we use strings for enums? Imagine the following definition:

enum size: { big: 'big', medium: 'average', small: 'small' }

could you please add a test for it so is more clear how it behaves? Thanks

[s-mage]

hi @coorasse, it's been a while. I've added a patch for working with enums you described, now it's consistent (works both for keys and values).

[coorasse]

scheduled for version 2.4.0. Thanks! 🙇