implement new liquid tag: fetch_page (#209)

did committed Aug 13, 2014

commit f9687ccec02474c7e7204b494ce686d721e801f7

Showing 3 changed files with 51 additions and 0 deletions

locomotive/wagon/liquid/tags/fetch_page.rb b/lib/locomotive/wagon/liquid/tags/fetch_page.rb +41 -0

@@	@@ -0,0 +1,41 @@
+	module Locomotive
+	module Wagon
+	module Liquid
+	module Tags
+
+	# Fetch a page from its handle and assign it to a liquid variable.
+	#
+	# Usage:
+	#
+	# {% fetch_page 'about_us' as a_page %}
+	# <p>{{ a_page.title }}</p>
+	#
+	class FetchPage < ::Liquid::Tag
+
+	Syntax = /(#{::Liquid::VariableSignature}+)\s+as\s+(#{::Liquid::VariableSignature}+)/
+
+	def initialize(tag_name, markup, tokens, context)
+	if markup =~ Syntax
+	@handle = $1
+	@var = $2
+	else
+	raise SyntaxError.new("Syntax Error in 'fetch_page' - Valid syntax: fetch_page page_handle as variable")
+	end
+
+	super
+	end
+
+	def render(context)
+	mounting_point = context.registers[:mounting_point]
+	context.scopes.last[@var] = mounting_point.pages.values.find { \|_page\| _page.handle == @handle }
+	''
+	end
+
+	end
+
+	::Liquid::Template.register_tag('fetch_page', FetchPage)
+	end
+
+	end
+	end
+	end
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spec/fixtures/default/app/views/pages/all.liquid.haml +3 -0

@@	@@ -10,4 +10,7 @@ published: false
	<li>{{ page.title }}</li>
	{% endfor %}
	</ul>
+
+	{% fetch_page our-music as my_page %}
+	<p>Single page: {{ my_page.title }}</p>
	{% endblock %}

spec/integration/server/liquid_spec.rb +7 -0

@@	@@ -88,4 +88,11 @@ describe Locomotive::Wagon::Server do
	end
	end

+	describe 'fetch_page' do
+	it 'returns the title of a page' do
+	get '/all'
+	last_response.body.should =~ %r(<p>Single page: Music</p>)
+	end
+	end
+
	end
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