Change default_json_module: 'oj' to 'json'

Author: fumihumi

README.md

@@ -141,10 +141,27 @@ SimpleJson.template_paths=["app/views", "app/simple_jsons"]
 
 Note that these paths should not be eager loaded cause using .rb as suffix.
 
-SimpleJson uses Oj as json serializer by default. Modules with `#encode` and `#decode` method can be used here.
+SimpleJson uses ActiveSupport::JSON as the default JSON serializer. If you want to change to a module that has `#encode` and `#decode` methods, such as the Oj gem, you can do so as follows.
 
 ```ruby
-SimpleJson.json_module = ActiveSupport::JSON
+
+# define Custom Json class
+# ex. config/initializers/simple_json/json.rb
+module SimpleJson
+  module Json
+    class Oj
+      def self.encode(json)
+        ::Oj.dump(json, mode: :rails)
+      end
+
+      def self.decode(json_string)
+        ::Oj.load(json_string, mode: :rails)
+      end
+    end
+  end
+end
+
+SimpleJson.json_module = SimpleJson::Json::Oj
 ```
 
 ## The Generator
@@ -283,7 +300,7 @@ Note that render will be performed twice, so using it in production mode is not
 
 ## Contributing
 
-Pull requests are welcome on GitHub at https://github.com/aktsk/simple_json.
+Pull requests are welcome on GitHub at <https://github.com/aktsk/simple_json>.
 
 ## License
 

lib/simple_json.rb

@@ -8,14 +8,13 @@
 
 require 'simple_json/migratable'
 require 'simple_json/simple_json_renderer_for_migration'
-require 'simple_json/json'
 
 module SimpleJson
   @config = {
     cache_enabled: false,
     template_paths: ['app/views'],
     cache_key_prefix: 'simple_json/views',
-    default_json_module: Json::Oj
+    default_json_module: ActiveSupport::JSON
   }
 
   class << self

simple_json.gemspec

@@ -20,7 +20,7 @@ Gem::Specification.new do |spec|
   spec.executables   = spec.files.grep(%r{^exe/}) { |f| File.basename(f) }
   spec.require_paths = ['lib']
 
-  spec.add_dependency 'oj', '~> 3.13'
+  spec.add_development_dependency 'oj'
 
   spec.add_development_dependency 'action_args'
   spec.add_development_dependency 'bundler'