Module: SimpleMapper::JsonFormat::ClassMethods

Defined in:
lib/simple_mapper/formats/json_format.rb

Instance Method Summary collapse

Instance Method Details

#from_json(json) ⇒ Object

This assumes a standard json format:

{'person':{'attribute':'','another_att':'value'}}

And for a collection of objects:

{'people':[{'person':{'attribute':'','another_att':'value 1'}},{'person':{'attribute':'','another_att':'value'}}]}



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# File 'lib/simple_mapper/formats/json_format.rb', line 27

def from_json(json)
  doc = Serialize.hash_from_json(json)
  # doc could include a single 'model' element, or a 'models' wrapper around several.
  puts "Top-level JSON key(s): #{doc.keys.inspect}" if @debug
  if doc.is_a?(Hash)
    key = doc.keys.first
    if doc[key] && doc[key].keys.uniq == [key.singularize] && doc[key][key.singularize].is_a?(Array)
      puts "Several objects returned under key '#{key}'/'#{key.singularize}':" if @debug
      doc[key][key.singularize].collect do |e|
        puts "Obj: #{e.inspect}" if @debug
        Object.module_eval("::#{key.singularize.camelize}", __FILE__, __LINE__).load(e)
      end
    elsif doc[key] # top-level must be single object
      Object.module_eval("::#{key.singularize.camelize}", __FILE__, __LINE__).load(doc[self.name.underscore])
    else
      nil
    end
  else # doc isn't a hash, probably nil
    doc
  end
end