Class | Tilt::YajlTemplate |
In: |
lib/tilt/yajl.rb
|
Parent: | 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 80 80: def decorate(json) 81: callback, variable = options[:callback], options[:variable] 82: if callback && variable 83: "var #{variable} = #{json}; #{callback}(#{variable});" 84: elsif variable 85: "var #{variable} = #{json};" 86: elsif callback 87: "#{callback}(#{json});" 88: else 89: json 90: end 91: end
# File lib/tilt/yajl.rb, line 56 56: def evaluate(scope, locals, &block) 57: decorate super(scope, locals, &block) 58: end
# File lib/tilt/yajl.rb, line 49 49: def initialize_engine 50: require_template_library 'yajl' 51: end
# File lib/tilt/yajl.rb, line 65 65: def precompiled_postamble(locals) 66: "Yajl::Encoder.new.encode(json)" 67: end
# File lib/tilt/yajl.rb, line 60 60: def precompiled_preamble(locals) 61: return super if locals.include? :json 62: "json = {}\n#{super}" 63: end