63 lines
1.6 KiB
Ruby
63 lines
1.6 KiB
Ruby
# 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:
|
|
# @something = SomeClass.new
|
|
#
|
|
# template:
|
|
# {{something.an_allowed_method}}{{something.unallowed_method}} {{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.
|
|
#
|
|
class Module
|
|
|
|
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
|
|
|
|
end
|