Merge pull request #30 from OutrageousLabs/read-options

read options from default_serializer_options.

README.md

@@ -109,6 +109,16 @@ get "/homes"
 end
 ```
 
+### Support for `default_serializer_options`
+
+```ruby
+  helper do
+    def default_serializer_options
+      {only: params[:only], except: params[:except]}
+    end
+  end
+```
+
 ### current_user
 
 One of the nice features of ActiveModel::Serializers is that it

grape-active_model_serializers.gemspec

@@ -22,5 +22,5 @@ Gem::Specification.new do |gem|
   gem.add_development_dependency "rspec"
   gem.add_development_dependency "rack-test"
   gem.add_development_dependency "rake"
-  gem.add_development_dependency 'guard-rspec'
+  gem.add_development_dependency "guard-rspec"
 end

lib/grape-active_model_serializers/formatter.rb

@@ -56,7 +56,7 @@ module Grape
         end
 
         def build_options_from_endpoint(endpoint)
-          endpoint.namespace_options.merge(endpoint.route_options)
+          [endpoint.default_serializer_options || {}, endpoint.namespace_options, endpoint.route_options].reduce(:merge)
         end
 
         # array root is the innermost namespace name ('space') if there is one,

spec/grape-active_model_serializers/endpoint_extension_spec.rb

@@ -7,12 +7,12 @@ describe 'Grape::EndpointExtension' do
   let(:serializer) { Grape::Formatter::ActiveModelSerializers }
 
   let(:user) do
-               Object.new do
-                 def name
-                   'sven'
-                 end
-               end
-             end
+    Object.new do
+      def name
+        'sven'
+      end
+    end
+  end
 
   let(:users) { [user, user] }
 

spec/grape-active_model_serializers/formatter_spec.rb

@@ -41,6 +41,10 @@ describe Grape::Formatter::ActiveModelSerializers do
       def endpoint.current_user
         @current_user ||= User.new(first_name: 'Current user')
       end
+
+      def endpoint.default_serializer_options
+        { only: :only, except: :except }
+      end
     end
 
     subject { described_class.fetch_serializer(user, env) }
@@ -48,7 +52,12 @@ describe Grape::Formatter::ActiveModelSerializers do
     it { should be_a UserSerializer }
 
     it 'should have correct scope set' do
-      expect(subject.scope).to eq(endpoint.current_user)
+      expect(subject.scope.current_user).to eq(endpoint.current_user)
+    end
+
+    it 'should read default serializer options' do
+      expect(subject.instance_variable_get('@only')).to eq([:only])
+      expect(subject.instance_variable_get('@except')).to eq([:except])
     end
   end
 end