Class: HashBuilder

Inherits:
Object
  • Object
show all
Defined in:
lib/hash_builder.rb

Overview

This class simplifies the creation of potentially deeply nested hashes It turns code like this:

hash = {
  one: {
    two: {
      three: {
        four: :foo
      }
    }
  }
}

Into this:

hash = HashBuilder.new
hash.one.two.three.four = :foo

The underlaying hash can be retrieved with #as_json.

NOTE: Its good practice to also implement respond_to_missing? when overriding method_missing, but for some reason that makes the tests fail.

Instance Method Summary collapse

Constructor Details

#initialize ⇒ HashBuilder

Returns a new instance of HashBuilder.



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# File 'lib/hash_builder.rb', line 24

def initialize
  @hash = {}
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(name, *args) ⇒ Object 



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# File 'lib/hash_builder.rb', line 32

def method_missing(name, *args)
  match = name.to_s.match(/(?<key>.*?)=$/)

  if match.present?
    @hash[match[:key].to_sym] = args.first
  else
    @hash[name] = HashBuilder.new if @hash[name].blank?
    @hash[name]
  end
end

Instance Method Details

#as_json ⇒ Object 



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# File 'lib/hash_builder.rb', line 28

def as_json
  @hash.as_json
end