Migrated from using-liquid-without-rails v11

RichMorin
2010-08-12 13:45:59 -07:00
parent 33b5de7a2e
commit f41a9301c2
+21 -14
@@ -7,7 +7,8 @@ The big secret, however, is creating a @to_liquid@ method for any classes you wa
Let's say you have a Product class:
<pre><code>class Product
<pre>
class Product
attr_accessor :name, :price
def initialize(name,price)
@@ -15,25 +16,28 @@ Let's say you have a Product class:
@price = price
end
end
</code></pre>
</pre>
And you have a chunk of text that you want to Liquidize by inserting some details about your products:
<pre><code>sentence = "I'm running to the store with {{ product.price }} dollars in my pocket "
<pre>
sentence = "I'm running to the store with {{ product.price }} dollars in my pocket "
sentence += "to buy a {{ product.name }}."
</code></pre>
</pre>
And you create a product and parse the sentence:
<pre><code>my_purchase = Product.new('box of sausages', 20)
<pre>
my_purchase = Product.new('box of sausages', 20)
puts Liquid::Template.parse(sentence).render('product' => my_purchase)
</code></pre>
</pre>
You excitedly execute your code, expecting to see your beautiful new sentence, but instead you get:
<pre><code>I'm running to the store with Liquid error:
<pre>
I'm running to the store with Liquid error:
undefined method `to_liquid' for #<Product:0x1388c08 ...
</code></pre>
</pre>
@to_liquid@ ???
Where did that come from?
@@ -42,7 +46,8 @@ Turns out you need to add a method to your class that returns your instance vari
so you need to explicitly let Liquid know how to access everything in your object.)
So, we update the @Product@ class description to include that method:
<pre><code>class Product
<pre>
class Product
attr_accessor :name, :price
def initialize(name, price)
@@ -55,16 +60,18 @@ So, we update the @Product@ class description to include that method:
"price" => self.price }
end
end
</code></pre>
</pre>
Run that again and presto:
<pre><code>I'm running to the store with 20 dollars in my pocket to buy a box of sausages.
</code></pre>
<pre>
I'm running to the store with 20 dollars in my pocket to buy a box of sausages.
</pre>
However, that's a bit verbose, so you may want to use @liquid_methods@, instead:
<pre><code>class Product
<pre>
class Product
attr_accessor :name, :price
liquid_methods :name, :price
@@ -73,6 +80,6 @@ However, that's a bit verbose, so you may want to use @liquid_methods@, instead:
@price = price
end
end
</code></pre>
</pre>
(Thanks to "Tom's":http://github.com/mojombo "Jekyll":http://github.com/mojombo/jekyll/tree/master/lib/jekyll/post.rb#L122-128 code for helping me figuring this out.)