e71cd7a300
Refactor ability.rb into Policies
## What does this MR do?
Factors out `ability.rb` into a new abstraction - the "policy" (stored in `app/policies`). A policy is a class named `#{class_name}Policy` (looked up automatically as needed) that implements `rules` as follows:
``` ruby
class ThingPolicy < BasePolicy
def rules
@user # this is a user to determine abilities for, optionally nil in the anonymous case
@subject # this is the subject of the ability, guaranteed to be an instance of `Thing`
can! :some_ability # grant the :some_ability permission
cannot! :some_ability # ensure that :some_ability is not allowed. this overrides any `can!` that is called before or after
delegate! @subject.other_thing # merge the abilities (can!) and prohibitions (cannot!) from `@subject.other_thing`
can? :some_ability # test whether, so far, :some_ability is allowed
end
def anonymous_rules
# optional. if not implemented `rules` is called where `@user` is nil. otherwise this method is called when `@user` is nil.
end
end
```
See merge request !5796
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| .. | ||
| config | ||
| controllers | ||
| factories | ||
| features | ||
| finders | ||
| fixtures | ||
| helpers | ||
| initializers | ||
| javascripts | ||
| lib | ||
| mailers | ||
| models | ||
| policies | ||
| requests | ||
| routing | ||
| services | ||
| support | ||
| tasks/gitlab | ||
| uploaders | ||
| views | ||
| workers | ||
| factories_spec.rb | ||
| rails_helper.rb | ||
| simplecov_env.rb | ||
| spec_helper.rb | ||
| teaspoon_env.rb | ||