From 91f8ef7026a98563432cf9b90ac5289b50890330 Mon Sep 17 00:00:00 2001
From: Semyon Pupkov <mail@semyonpupkov.com>
Date: Wed, 19 Apr 2017 11:45:50 +0500
Subject: [PATCH] fix: add extractor back for capability

https://jira.railsc.ru/browse/USERS-244
---
 lib/treasury/fields/extractor.rb           | 23 ++++++++++++++++++++++
 spec/lib/treasury/fields/extractor_spec.rb | 13 ++++++++++++
 2 files changed, 36 insertions(+)
 create mode 100644 lib/treasury/fields/extractor.rb
 create mode 100644 spec/lib/treasury/fields/extractor_spec.rb

diff --git a/lib/treasury/fields/extractor.rb b/lib/treasury/fields/extractor.rb
new file mode 100644
index 0000000..9b8d0ae
--- /dev/null
+++ b/lib/treasury/fields/extractor.rb
@@ -0,0 +1,23 @@
+module Treasury
+  module Fields
+    # Public: Модуль добавляет классу метод extract_object, подходит для источников и полей денормализации.
+    #
+    # Deprecated: For extract object use Apress::Sources::ExtractObject module
+    #
+    # Example:
+    #
+    #   class Field
+    #     extend ::Treasury::Fields::Extractor
+    #     extract_attribute_name :user
+    #   end
+    #
+    #   Field.extract_object(object: {user_id: 1})
+    #     => 1
+    module Extractor
+      def self.extended(base)
+        warn "[DEPRECATION] Please use `extend Apress::Sources::ExtractObject` instead Treasury::Fields::Extractor"
+        base.extend(Apress::Sources::ExtractObject)
+      end
+    end
+  end
+end
diff --git a/spec/lib/treasury/fields/extractor_spec.rb b/spec/lib/treasury/fields/extractor_spec.rb
new file mode 100644
index 0000000..580f764
--- /dev/null
+++ b/spec/lib/treasury/fields/extractor_spec.rb
@@ -0,0 +1,13 @@
+RSpec.describe Treasury::Fields::Extractor do
+  let(:class_with_extractor) do
+    Class.new do
+      extend Treasury::Fields::Extractor
+
+      extract_attribute_name :user
+    end
+  end
+
+  describe '.extract_object' do
+    it { expect(class_with_extractor.extract_user(object: {user_id: 1})).to eq 1 }
+  end
+end