Railties 5.0 + jsonb fix (#3)

* Bumping railties allowable version

* support JSONB types

* Add jsonb support explicitly

Gemfile.lock

@@ -3,7 +3,7 @@ PATH
   specs:
     activeadmin_json_editor (0.0.6)
       ace-rails-ap
-      railties (>= 3.0, < 5.0)
+      railties (>= 3.0, < 5.1)
 
 GEM
   remote: https://rubygems.org/

activeadmin_json_editor.gemspec

@@ -18,7 +18,7 @@ Gem::Specification.new do |spec|
 
   spec.required_rubygems_version = '>= 1.3.6'
   spec.add_development_dependency 'bundler', '~> 1.5'
-  spec.add_dependency 'railties', '>= 3.0', '< 5.0'
+  spec.add_dependency 'railties', '>= 3.0', '< 5.1'
   # spec.add_development_dependency "rake", "~> 0"
   # spec.add_dependency "active_admin", "~> 1.0.0"
   spec.add_dependency 'ace-rails-ap'

lib/activeadmin/resource_dsl.rb

@@ -7,7 +7,7 @@ def json_editor
       before_save do |object, _args|
         request_namespace = object.class.name.underscore.tr('/', '_')
         if params.key? request_namespace
-          object.class.columns_hash.select { |_key, attr| attr.type == :json }.keys.each do |key|
+          object.class.columns_hash.select { |_key, attr| attr.type.in? [:json, :jsonb] }.keys.each do |key|
             next unless params[request_namespace].key? key
             json_data = params[request_namespace][key]
             data = if json_data == 'null' || json_data.blank?