Merge branch 'master' into role_model_codestyle

README.md

@@ -181,6 +181,17 @@ user.has_role? :moderator, Forum.last
 => true
 ```
 
+To check if a user has the exact role scoped to a resource class:
+
+```ruby
+user = User.find(5)
+user.add_role :moderator # sets a global role
+user.has_role? :moderator, Forum.first
+=> true
+user.has_strict_role? :moderator, Forum.last
+=> false
+```
+
 ### 6. Resource roles querying
 
 Starting from rolify 3.0, you can search roles on instance level or class level resources.

lib/rolify/adapters/active_record/resource_adapter.rb

@@ -40,7 +40,7 @@ def applied_roles(relation, children)
 
       def all_except(resource, excluded_obj)
         prime_key = resource.primary_key.to_sym
-        resource.where(prime_key => (resource.all - excluded_obj).map(&prime_key))
+        resource.where.not(prime_key => excluded_obj.pluck(prime_key))
       end
 
       private

lib/rolify/adapters/active_record/role_adapter.rb

@@ -68,19 +68,13 @@ def exists?(relation, column)
       end
 
       def scope(relation, conditions)
-        if Rails.version < "4.0"
-          query = relation.scoped
-        else
-          query = relation.all
-        end
-        query = query.joins(:roles)
+        query = relation.joins(:roles)
         query = where(query, conditions)
         query
       end
 
       def all_except(user, excluded_obj)
-        prime_key = user.primary_key.to_sym
-        user.where(prime_key => (user.all - excluded_obj).map(&prime_key))
+        user.where.not(user.primary_key => excluded_obj)
       end
 
       private