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# Rails <2.x doesn't define #except

class Hash #:nodoc:

  # Returns a new hash without the given keys.

  def except(*keys)

    clone.except!(*keys)

  end unless method_defined?(:except)

  # Replaces the hash without the given keys.

  def except!(*keys)

    keys.map! { |key| convert_key(key) } if respond_to?(:convert_key)

    keys.each { |key| delete(key) }

    self

  end unless method_defined?(:except!)

end

# NamedScope is new to Rails 2.1

unless defined? ActiveRecord::NamedScope

  require 'awesome_nested_set/named_scope'

  ActiveRecord::Base.class_eval do

    include CollectiveIdea::NamedScope

  end

end

# Rails 1.2.x doesn't define #quoted_table_name

class ActiveRecord::Base  #:nodoc:

  def self.quoted_table_name

    self.connection.quote_column_name(self.table_name)

  end unless methods.include?('quoted_table_name')

end