Merge pull request #148 from syguer/add_rails5.1

Add rails5.1

.travis.yml

@@ -24,8 +24,10 @@ matrix:
     - rvm: 2.2.4
       gemfile: gemfiles/rails_4.0.no-active-record.gemfile
       env: SKIP_ACTIVE_RECORD=true
-    - rvm: 2.4.0
+    - rvm: 2.4.1
       gemfile: gemfiles/rails_4.2.gemfile
-    - rvm: 2.4.0
+    - rvm: 2.4.1
       gemfile: gemfiles/rails_5.0.gemfile
+    - rvm: 2.4.1
+      gemfile: gemfiles/rails_5.1.gemfile
 script: "bundle exec rake spec"

gemfiles/rails_5.1.gemfile

@@ -0,0 +1,24 @@
+source 'http://rubygems.org/'
+
+gem 'activerecord', '~> 5.1.0'
+gem 'rspec', '~> 2.2.0'
+gem 'wwtd'
+gem 'rake', '~> 10.0'
+gem 'json'
+gem 'test-unit'
+
+platform :jruby do
+  gem 'activerecord-jdbcsqlite3-adapter', '>= 1.3.6'
+end
+
+platform :ruby do
+  gem 'sqlite3'
+end
+
+platforms :rbx do
+  gem 'racc'
+  gem 'rubysl', '~> 2.0'
+  gem 'psych'
+end
+
+gemspec :path => '../'

lib/active_hash/base.rb

@@ -35,7 +35,7 @@ def cache_key
         if Object.const_defined?(:ActiveModel)
           model_name.cache_key
         else
-          ActiveSupport::Inflector.tableize(self).downcase
+          ActiveSupport::Inflector.tableize(self.name).downcase
         end
       end