class Tilt::YajlTemplate
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.
Example¶ ↑
# 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)
Public Instance Methods
Source
# File lib/tilt/yajl.rb 68 def decorate(json) 69 callback, variable = @options[:callback], @options[:variable] 70 if callback && variable 71 "var #{variable} = #{json}; #{callback}(#{variable});" 72 elsif variable 73 "var #{variable} = #{json};" 74 elsif callback 75 "#{callback}(#{json});" 76 else 77 json 78 end 79 end
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.
Source
# File lib/tilt/yajl.rb 45 def evaluate(scope, locals, &block) 46 decorate(super) 47 end
Calls superclass method
Tilt::Template#evaluate
Source
# File lib/tilt/yajl.rb 54 def precompiled_postamble(locals) 55 "Yajl::Encoder.new.encode(json)" 56 end
Source
# File lib/tilt/yajl.rb 49 def precompiled_preamble(locals) 50 return super if locals.include? :json 51 "json = {}\n#{super}" 52 end
Calls superclass method
Tilt::Template#precompiled_preamble
Source
# File lib/tilt/yajl.rb 58 def precompiled_template(locals) 59 @data.to_str 60 end