Allow global settings on Grape::Entity.

This fixes a regression introduced after merging a ruby-grape#134.
It's something undocumented before but it worked before and I don't see
anything harmful in the presence of this feature.

Fixes ruby-grape#166.

.rubocop_todo.yml

@@ -1,38 +1,38 @@
 # This configuration was generated by `rubocop --auto-gen-config`
-# on 2015-05-21 22:47:03 +0700 using RuboCop version 0.31.0.
+# on 2015-08-10 12:30:52 +0300 using RuboCop version 0.31.0.
 # The point is for the user to remove these configuration records
 # one by one as the offenses are removed from the code base.
 # Note that changes in the inspected code, or installation of new
 # versions of RuboCop, may require this file to be generated again.
 
-# Offense count: 8
+# Offense count: 7
 Metrics/AbcSize:
-  Max: 51
+  Max: 45
 
 # Offense count: 1
 # Configuration parameters: CountComments.
 Metrics/ClassLength:
-  Max: 328
+  Max: 333
 
-# Offense count: 5
+# Offense count: 4
 Metrics/CyclomaticComplexity:
   Max: 17
 
-# Offense count: 176
+# Offense count: 193
 # Configuration parameters: AllowURI, URISchemes.
 Metrics/LineLength:
   Max: 146
 
-# Offense count: 7
+# Offense count: 8
 # Configuration parameters: CountComments.
 Metrics/MethodLength:
-  Max: 32
+  Max: 26
 
-# Offense count: 5
+# Offense count: 7
 Metrics/PerceivedComplexity:
   Max: 15
 
-# Offense count: 31
+# Offense count: 37
 Style/Documentation:
   Enabled: false
 

CHANGELOG.md

@@ -1,3 +1,6 @@
+0.4.8 (2015-08-10)
+* [#167](https://github.com/intridea/grape-entity/pull/167): Regression: global settings (exposures, formatters) on `Grape::Entity` should work: [#166](https://github.com/ruby-grape/grape-entity/issues/166) - [@marshall-lee](http://github.com/marshall-lee).
+
 0.4.7 (2015-08-03)
 ==================
 * [#164](https://github.com/intridea/grape-entity/pull/164): Regression: entity instance methods were exposed with `NoMethodError`: [#163](https://github.com/intridea/grape-entity/issues/163) - [@marshall-lee](http://github.com/marshall-lee).

lib/grape_entity/entity.rb

@@ -112,12 +112,18 @@ class << self
       attr_accessor :nested_exposures
     end
 
+    @exposures = {}
+    @root_exposures = {}
+    @nested_exposures = {}
+    @nested_attribute_names = {}
+    @formatters = {}
+
     def self.inherited(subclass)
-      subclass.exposures = exposures.try(:dup) || {}
-      subclass.root_exposures = root_exposures.try(:dup) || {}
-      subclass.nested_exposures = nested_exposures.try(:dup) || {}
-      subclass.nested_attribute_names = nested_attribute_names.try(:dup) || {}
-      subclass.formatters = formatters.try(:dup) || {}
+      subclass.exposures = exposures.try(:dup)
+      subclass.root_exposures = root_exposures.try(:dup)
+      subclass.nested_exposures = nested_exposures.try(:dup)
+      subclass.nested_attribute_names = nested_attribute_names.try(:dup)
+      subclass.formatters = formatters.try(:dup)
     end
 
     # This method is the primary means by which you will declare what attributes
@@ -183,7 +189,10 @@ def self.expose(*args, &block)
     end
 
     def self.unexpose(attribute)
+      root_exposures.delete(attribute)
       exposures.delete(attribute)
+      nested_exposures.delete(attribute)
+      nested_attribute_names.delete(attribute)
     end
 
     # Set options that will be applied to any exposures declared inside the block.

lib/grape_entity/version.rb

@@ -1,3 +1,3 @@
 module GrapeEntity
-  VERSION = '0.4.7'
+  VERSION = '0.4.8'
 end

spec/grape_entity/entity_spec.rb

@@ -278,6 +278,26 @@ class Parent < Person
           subject.expose(:size, format_with: :size_formatter)
           expect(subject.represent(object).send(:value_for, :size)).to eq object.class.to_s
         end
+
+        it 'works global on Grape::Entity' do
+          Grape::Entity.format_with :size_formatter do |_date|
+            self.object.class.to_s
+          end
+          object = {}
+
+          subject.expose(:size, format_with: :size_formatter)
+          expect(subject.represent(object).send(:value_for, :size)).to eq object.class.to_s
+        end
+      end
+
+      it 'works global on Grape::Entity' do
+        Grape::Entity.expose :x
+        object = { x: 11, y: 22 }
+        expect(Grape::Entity.represent(object).send(:value_for, :x)).to eq 11
+        subject.expose :y
+        expect(subject.represent(object).send(:value_for, :x)).to eq 11
+        expect(subject.represent(object).send(:value_for, :y)).to eq 22
+        Grape::Entity.unexpose :x
       end
     end
 
@@ -310,6 +330,13 @@ class Parent < Person
           end
         end
       end
+
+      it 'works global on Grape::Entity' do
+        Grape::Entity.expose :x
+        expect(Grape::Entity.exposures).to eq(x: {})
+        Grape::Entity.unexpose :x
+        expect(Grape::Entity.exposures).to eq({})
+      end
     end
 
     describe '.with_options' do