Template
Yajl Template implementation
Yajl is a fast JSON parsing and encoding library for Ruby See github.com/brianmario/yajl-ruby
The template source is evaluated as a Ruby string, and the result is converted to_json.
# This is a template example. # The template can contain any Ruby statement. tpl <<-EOS @counter = 0 # The json variable represents the buffer # and holds the data to be serialized into json. # It defaults to an empty hash, but you can override it at any time. json = { :"user#{@counter += 1}" => { :name => "Joshua Peek", :id => @counter }, :"user#{@counter += 1}" => { :name => "Ryan Tomayko", :id => @counter }, :"user#{@counter += 1}" => { :name => "Simone Carletti", :id => @counter }, } # Since the json variable is a Hash, # you can use conditional statements or any other Ruby statement # to populate it. json[:"user#{@counter += 1}"] = { :name => "Unknown" } if 1 == 2 # The last line doesn't affect the returned value. nil EOS template = Tilt::YajlTemplate.new { tpl } template.render(self)
Decorates the json input according to given options.
json - The json String to decorate. options - The option Hash to customize the behavior.
Returns the decorated String.
# File lib/tilt/yajl.rb, line 73 def decorate(json) callback, variable = options[:callback], options[:variable] if callback && variable "var #{variable} = #{json}; #{callback}(#{variable});" elsif variable "var #{variable} = #{json};" elsif callback "#{callback}(#{json});" else json end end
# File lib/tilt/yajl.rb, line 49 def evaluate(scope, locals, &block) decorate super(scope, locals, &block) end
# File lib/tilt/yajl.rb, line 58 def precompiled_postamble(locals) "Yajl::Encoder.new.encode(json)" end
# File lib/tilt/yajl.rb, line 53 def precompiled_preamble(locals) return super if locals.include? :json "json = {}\n#{super}" end
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