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# File 'lib/truncates.rb', line 8
def truncates(field_name, options = {})
raise("Hash expected, got #{options.class.name}") if !options.is_a?(Hash) && !options.empty?
max_length = options[:max_length] || DEFAULT_MAX_LENGTH
character_trail = options[:character_trail] || DEFAULT_CHARACTER_TRAIL
on = options[:on] || DEFAULT_ON
puts "field_name: #{field_name}\non: #{on}"
case on.to_s
when "validation"
before_validation do
value = eval("self.#{field_name}")
if(value.present? && value.length > max_length)
new_value = value.slice(0, max_length - character_trail.length) + character_trail
eval("self.#{field_name}=\"#{new_value}\"")
end
end
when "set"
define_method "#{field_name}=" do |value|
new_value = value
if(value.present? && value.length > max_length)
new_value = value.slice(0, max_length - character_trail.length) + character_trail
end
begin
super(new_value)
rescue NoMethodError
eval("@#{field_name} = \"#{new_value}\"")
end
end
end
end
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