class Liquid::Drop
A drop in liquid is a class which allows you to export DOM like things to liquid. Methods of drops are callable. The main use for liquid drops is to implement lazy loaded objects. If you would like to make data available to the web designers which you don't want loaded unless needed then a drop is a great way to do that.
Example:
class ProductDrop < Liquid::Drop def top_sales Shop.current.products.find(:all, :order => 'sales', :limit => 10 ) end end tmpl = Liquid::Template.parse( ' {% for product in product.top_sales %} {{ product.name }} {%endfor%} ' ) tmpl.render('product' => ProductDrop.new ) # will invoke top_sales query.
Your drop can either implement the methods sans any parameters or implement the #before_method(name) method which is a catch all.
Constants
- EMPTY_STRING
Attributes
context[W]
Private Class Methods
invokable?(method_name)
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Check for method existence without invoking respond_to?, which creates symbols
# File lib/liquid/drop.rb, line 56 def self.invokable?(method_name) @invokable_methods ||= Set.new(["to_liquid"] + (public_instance_methods - Liquid::Drop.public_instance_methods).map(&:to_s)) @invokable_methods.include?(method_name.to_s) end
Public Instance Methods
before_method(method)
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Catch all for the method
# File lib/liquid/drop.rb, line 30 def before_method(method) nil end
has_key?(name)
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# File lib/liquid/drop.rb, line 43 def has_key?(name) true end
invoke_drop(method_or_key)
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called by liquid to invoke a drop
# File lib/liquid/drop.rb, line 35 def invoke_drop(method_or_key) if method_or_key && method_or_key != EMPTY_STRING && self.class.invokable?(method_or_key) send(method_or_key) else before_method(method_or_key) end end
Also aliased as: []
to_liquid()
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# File lib/liquid/drop.rb, line 47 def to_liquid self end