Module: FeedTools::GenericHelper

Defined in:
lib/feed_tools/helpers/generic_helper.rb

Overview

Generic methods needed in numerous places throughout FeedTools

Class Method Summary collapse

Class Method Details

.recursion_trap(lock_object, &block) ⇒ Object

Nifty little method that takes a block and returns nil if recursion occurs or the block’s result value if it doesn’t.



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# File 'lib/feed_tools/helpers/generic_helper.rb', line 40

def self.recursion_trap(lock_object, &block)
  if @lock_ids.nil?
    @lock_ids = []
  end
  if !@lock_ids.include?(lock_object.object_id)
    @lock_ids << lock_object.object_id
  else
    return nil
  end
  begin
    result = block.call
  rescue SystemStackError
    result = nil
  end
  @lock_ids.delete(lock_object.object_id)
  return result
end

.validate_options(valid_option_keys, supplied_option_keys) ⇒ Object

Raises an exception if an invalid option has been specified to prevent misspellings from slipping through



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# File 'lib/feed_tools/helpers/generic_helper.rb', line 31

def self.validate_options(valid_option_keys, supplied_option_keys)
  unknown_option_keys = supplied_option_keys - valid_option_keys
  unless unknown_option_keys.empty?
    raise "Unknown options: #{unknown_option_keys}"
  end
end