use before_action for rails 5, maintain backwards compat.

README.md

@@ -139,7 +139,7 @@ Usage
         @widget.impressionist_count(:message=>"pageview", :filter=>:all)
 
 Logging impressions for authenticated users happens automatically.  If you have
-a current_user helper or use @current_user in your before_filter to set your
+a current_user helper or use @current_user in your before_filter (or before_action in Rails >= 5.0) to set your
 authenticated user, current_user.id will be written to the user_id field in the
 impressions table.
 

app/controllers/impressionist_controller.rb

@@ -3,14 +3,22 @@ require 'digest/sha2'
 module ImpressionistController
   module ClassMethods
     def impressionist(opts={})
+      if Rails::VERSION::MAJOR >= 5
+        before_action { |c| c.impressionist_subapp_filter(opts) }
+      else
         before_filter { |c| c.impressionist_subapp_filter(opts) }
       end
     end
+  end
 
   module InstanceMethods
     def self.included(base)
+      if Rails::VERSION::MAJOR >= 5
+        base.before_action :impressionist_app_filter
+      else
         base.before_filter :impressionist_app_filter
       end
+    end
 
     def impressionist(obj,message=nil,opts={})
       if should_count_impression?(opts)

tests/test_app/app/controllers/application_controller.rb

@@ -1,8 +1,12 @@
 class ApplicationController < ActionController::Base
   protect_from_forgery
-  before_filter :secondary_before_filter
+  if Rails::VERSION::MAJOR >= 5
+    before_action :secondary_before_action
+  else
+    before_filter :secondary_before_action
+  end
 
-  def secondary_before_filter
-    @test_secondary_before_filter = "this is a test"
+  def secondary_before_action
+    @test_secondary_before_action = "this is a test"
   end
 end

tests/test_app/app/controllers/articles_controller.rb

@@ -1,5 +1,9 @@
 class ArticlesController < ApplicationController
+  if Rails::VERSION::MAJOR >= 5
+    before_action :test_current_user_var
+  else
     before_filter :test_current_user_var
+  end
 
   def test_current_user_var
     if session[:user_id]

tests/test_app/config/environments/development.rb

@@ -23,7 +23,7 @@ TestApp::Application.configure do
   config.action_dispatch.best_standards_support = :builtin
 
   # Raise exception on mass assignment protection for Active Record models
-  config.active_record.mass_assignment_sanitizer = :strict
+  # config.active_record.mass_assignment_sanitizer = :strict
 
   # Log the query plan for queries taking more than this (works
   # with SQLite, MySQL, and PostgreSQL)

tests/test_app/config/environments/test.rb

@@ -30,7 +30,7 @@ TestApp::Application.configure do
   config.action_mailer.delivery_method = :test
 
   # Raise exception on mass assignment protection for Active Record models
-  config.active_record.mass_assignment_sanitizer = :strict
+  # config.active_record.mass_assignment_sanitizer = :strict
 
   # Print deprecation notices to the stderr
   config.active_support.deprecation = :stderr

tests/test_app/spec/controllers/articles_controller_spec.rb

@@ -26,7 +26,7 @@ describe ArticlesController do
     Article.first.impressions.last.action_name.should eq "show"
   end
 
-  it "should log the user_id if user is authenticated (@current_user before_filter method)" do
+  it "should log the user_id if user is authenticated (@current_user before_action method)" do
     session[:user_id] = 123
     get "show", :id=> 1
     Article.first.impressions.last.user_id.should eq 123
@@ -72,5 +72,3 @@ describe ArticlesController do
     Impression.last.referrer.should eq nil
   end
 end
-
-

tests/test_app/spec/initializers/initializers_spec.rb

@@ -13,7 +13,7 @@ describe Impressionist do
     expect(ApplicationController).to respond_to(method)
   end
 
-  it "should include the before_filter method in ApplicationController" do
+  it "should include the before_action method in ApplicationController" do
      filters = ApplicationController._process_action_callbacks.select { |c| c.kind == :before }
      filters.collect{|filter|filter.filter}.include?(:impressionist_app_filter).should be_true
   end