Class: Module

Inherits:
Object
  • Object
show all
Defined in:
lib/liquid/module_ex.rb

Overview

Copyright 2007 by Domizio Demichelis This library is free software. It may be used, redistributed and/or modified under the same terms as Ruby itself

This extension is usesd in order to expose the object of the implementing class to liquid as it were a Drop. It also limits the liquid-callable methods of the instance to the allowed method passed with the liquid_methods call Example:

class SomeClass

liquid_methods :an_allowed_method

def an_allowed_method
  'this comes from an allowed method'
end
def unallowed_method
  'this will never be an output'
end

end

if you want to extend the drop to other methods you can defines more methods in the class <YourClass>::LiquidDropClass

class SomeClass::LiquidDropClass
  def another_allowed_method
    'and this from another allowed method'
  end
end

end

usage: template: {something{something.an_allowed_method}{something{something.unallowed_method} {something{something.another_allowed_method}

output: ‘this comes from an allowed method and this from another allowed method’

You can also chain associations, by adding the liquid_method call in the association models.

Instance Method Summary collapse

Instance Method Details

#liquid_methods(*allowed_methods) ⇒ Object 



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# File 'lib/liquid/module_ex.rb', line 45

def liquid_methods(*allowed_methods)
  drop_class = eval "class #{self.to_s}::LiquidDropClass < Liquid::Drop; self; end"
  define_method :to_liquid do
    drop_class.new(self)
  end
  drop_class.class_eval do
    def initialize(object)
      @object = object
    end
    allowed_methods.each do |sym|
      define_method sym do
        @object.send sym
      end
    end
  end
end