Module: Pathy::InstanceMethods

Defined in:
lib/pathy.rb

Instance Method Summary collapse

Instance Method Details

#at_json_path(path) ⇒ Object

returns the value parsed from JSON at a given path. Example: => {:nested_key => ‘awesome’}.at_json_path(‘some_key.nested_key’) returns ‘awesome’



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# File 'lib/pathy.rb', line 13

def at_json_path path
  method_chain = path.split('.')
  method_chain.inject(self.reparsed_as_json) do |obj,method| 

    is_array_like     = obj.respond_to?(:push)
    key_or_index      = is_array_like ? method.to_i : method
    has_key_or_index  = is_array_like ? !obj.slice(key_or_index).nil? : obj.keys.include?(key_or_index)

    raise InvalidPathError, "Could not resolve #{path} at #{key_or_index}" unless has_key_or_index

    obj.send('[]', key_or_index) 
  end
end

#has_json_path?(path) ⇒ Boolean

returns true if the path is found. Provides usage in Rspec Example in rspec: => {:nested_key => ‘awesome’}.should have_json_path(‘some_key.nested_key’)

Returns:

  • (Boolean) 


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# File 'lib/pathy.rb', line 30

def has_json_path? path
  begin
    at_json_path(path)
    true
  rescue InvalidPathError
    false
  end
end

#reparsed_as_json ⇒ Object

returns the parsed JSON representation of an instance. If the current instance is a string we assume it’s JSON



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# File 'lib/pathy.rb', line 41

def reparsed_as_json
  self.is_a?(String) ? JSON.parse(self) : JSON.parse(self.to_json)
end