Set the logger to be `AR::Base.logger` or `Rails.logger` when the gem is included to Rails

However, this will make sure that you can always change it to something else afterward.

There's currently no test for this, but after I've tried this with the `integration_test` branch, I can confirm that logs are written to `log/test.log` as it should.

Closes #581

gemfiles/rails2.gemfile

@@ -2,19 +2,19 @@
 
 source "http://rubygems.org"
 
-gem "sqlite3", "~>1.3.4"
-gem "rails", "~> 2.3.12"
 gem "activerecord", :require=>"active_record"
+gem "appraisal"
+gem "aws-s3", :require=>"aws/s3"
+gem "bundler"
 gem "cocaine", "~>0.2"
-gem "rake"
-gem "sprockets", "~> 2.0.0.beta.13", :require=>false
-gem "shoulda"
-gem "mime-types"
+gem "fog"
 gem "jruby-openssl", :platform=>:jruby
+gem "mime-types"
 gem "mocha"
-gem "bundler"
-gem "fog"
-gem "appraisal"
-gem "aws-s3", :require=>"aws/s3"
+gem "rake"
 gem "rdoc", :require=>false
+gem "shoulda"
+gem "sqlite3", "~>1.3.4"
+gem "sprockets", "~> 2.0.0.beta.13", :require=>false
+gem "rails", "~> 2.3.12"
 

gemfiles/rails3.gemfile

@@ -2,19 +2,19 @@
 
 source "http://rubygems.org"
 
-gem "sqlite3", "~>1.3.4"
-gem "rails", "~> 3.0.9"
 gem "activerecord", :require=>"active_record"
+gem "appraisal"
+gem "aws-s3", :require=>"aws/s3"
+gem "bundler"
 gem "cocaine", "~>0.2"
-gem "rake"
-gem "sprockets", "~> 2.0.0.beta.13", :require=>false
-gem "shoulda"
-gem "mime-types"
+gem "fog"
 gem "jruby-openssl", :platform=>:jruby
+gem "mime-types"
 gem "mocha"
-gem "bundler"
-gem "fog"
-gem "appraisal"
-gem "aws-s3", :require=>"aws/s3"
+gem "rake"
 gem "rdoc", :require=>false
+gem "shoulda"
+gem "sqlite3", "~>1.3.4"
+gem "sprockets", "~> 2.0.0.beta.13", :require=>false
+gem "rails", "~> 3.0.9"
 

gemfiles/rails3_1.gemfile

@@ -2,19 +2,19 @@
 
 source "http://rubygems.org"
 
-gem "sqlite3", "~>1.3.4"
-gem "rails", "~> 3.1.0.rc5"
 gem "activerecord", :require=>"active_record"
+gem "appraisal"
+gem "aws-s3", :require=>"aws/s3"
+gem "bundler"
 gem "cocaine", "~>0.2"
-gem "rake"
-gem "sprockets", "~> 2.0.0.beta.13", :require=>false
-gem "shoulda"
-gem "mime-types"
+gem "fog"
 gem "jruby-openssl", :platform=>:jruby
+gem "mime-types"
 gem "mocha"
-gem "bundler"
-gem "fog"
-gem "appraisal"
-gem "aws-s3", :require=>"aws/s3"
+gem "rake"
 gem "rdoc", :require=>false
+gem "shoulda"
+gem "sqlite3", "~>1.3.4"
+gem "sprockets", "~> 2.0.0.beta.13", :require=>false
+gem "rails", "~> 3.1.0.rc5"
 

lib/paperclip.rb

@@ -142,7 +142,7 @@ module Paperclip
       end
     end
 
-    # Log a paperclip-specific line. Uses ActiveRecord::Base.logger
+    # Log a paperclip-specific line. This will logs to STDOUT
     # by default. Set Paperclip.options[:log] to false to turn off.
     def log message
       logger.info("[paperclip] #{message}") if logging?

lib/paperclip/railtie.rb

@@ -19,6 +19,8 @@ module Paperclip
     def self.insert
       ActiveRecord::Base.send(:include, Paperclip::Glue)
       File.send(:include, Paperclip::Upfile)
+
+      Paperclip.options[:logger] = defined?(ActiveRecord) ? ActiveRecord::Base.logger : Rails.logger
     end
   end
 end