Started again with Rails 4

[feedcatcher.git] / vendor / rails / activesupport / lib / active_support / whiny_nil.rb

diff --git a/vendor/rails/activesupport/lib/active_support/whiny_nil.rb b/vendor/rails/activesupport/lib/active_support/whiny_nil.rb
deleted file mode 100644 (file)
index 36fe951..0000000
--- a/vendor/rails/activesupport/lib/active_support/whiny_nil.rb
+++ /dev/null
@@ -1,58 +0,0 @@
-# Extensions to +nil+ which allow for more helpful error messages for people who
-# are new to Rails.
-#
-# Ruby raises NoMethodError if you invoke a method on an object that does not
-# respond to it:
-#
-#   $ ruby -e nil.destroy
-#   -e:1: undefined method `destroy' for nil:NilClass (NoMethodError)
-#
-# With these extensions, if the method belongs to the public interface of the
-# classes in NilClass::WHINERS the error message suggests which could be the
-# actual intended class:
-#
-#   $ script/runner nil.destroy 
-#   ...
-#   You might have expected an instance of ActiveRecord::Base.
-#   ...
-#
-# NilClass#id exists in Ruby 1.8 (though it is deprecated). Since +id+ is a fundamental
-# method of Active Record models NilClass#id is redefined as well to raise a RuntimeError
-# and warn the user. She probably wanted a model database identifier and the 4
-# returned by the original method could result in obscure bugs.
-#
-# The flag <tt>config.whiny_nils</tt> determines whether this feature is enabled.
-# By default it is on in development and test modes, and it is off in production
-# mode.
-class NilClass
-  WHINERS = [::Array]
-  WHINERS << ::ActiveRecord::Base if defined? ::ActiveRecord
-
-  METHOD_CLASS_MAP = Hash.new
-
-  WHINERS.each do |klass|
-    methods = klass.public_instance_methods - public_instance_methods
-    class_name = klass.name
-    methods.each { |method| METHOD_CLASS_MAP[method.to_sym] = class_name }
-  end
-
-  # Raises a RuntimeError when you attempt to call +id+ on +nil+.
-  def id
-    raise RuntimeError, "Called id for nil, which would mistakenly be 4 -- if you really wanted the id of nil, use object_id", caller
-  end
-
-  private
-    def method_missing(method, *args, &block)
-      raise_nil_warning_for METHOD_CLASS_MAP[method], method, caller
-    end
-
-    # Raises a NoMethodError when you attempt to call a method on +nil+.
-    def raise_nil_warning_for(class_name = nil, selector = nil, with_caller = nil)
-      message = "You have a nil object when you didn't expect it!"
-      message << "\nYou might have expected an instance of #{class_name}." if class_name
-      message << "\nThe error occurred while evaluating nil.#{selector}" if selector
-
-      raise NoMethodError, message, with_caller || caller
-    end
-end
-