Created
December 15, 2010 20:13
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| module CarrierWave::Conditional | |
| extend ActiveSupport::Concern | |
| module ClassMethods | |
| def process_if(*args) | |
| original_args = args.dup | |
| options = args.extract_options! | |
| c_true = options.delete(:if) | |
| c_false = options.delete(:if) | |
| raise "No condition specified for process_if specified" if c_true.nil? && c_false.nil? | |
| original_args.each do |a| | |
| m_name = a.is_a?(Hash) ? a.keys.first : a | |
| m_args = a.is_a?(Hash) ? a.values.first : nil | |
| if_m_name = :"#{m_name}_if_#{SimpleUUID::UUID.new.to_i}" | |
| unless m_name == :if | |
| define_method if_m_name do |*args| | |
| if !c_true.nil? && instance_exec(&c_true) | |
| send(m_name, *args) | |
| elsif !c_false.nil? && !instance_exec(&c_false) | |
| send(m_name, *args) | |
| end | |
| end | |
| process if_m_name => m_args | |
| end | |
| end | |
| end | |
| end | |
| end |
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