CODEWITHSUNDEEP
rubyinheritancehash
grumpasaurus
grumpasaurus

Reputation: 712

Merging a Hash to Hash Child Class - Ensure nested hash has the Child Class properties

I have a Hash Child Class where I typically want to initialize its data from another Hash and used this:

class ValidatedJson < Hash
    @schema = {}
    def initialize(hash = {})
        super
        JSON::Validator.validate!(@schema, hash, :validate_schema => true)
        self.update(hash)
    end

    def [](key)
        self.fetch(key)
    end
end

However, with self.update alone, any nested hash would be of type Hash, rather than having the properties of my child class ValidatedJson. Anyone know of a quick efficient way of ensuring this?

Upvotes: 2

Views: 303

Answers (1)

Craig Buchek
Craig Buchek

Reputation: 917

I'd probably emulate what ActiveSupport's HashWithIndifferentAccess does, which is to override update() as well as the constructor.

See https://github.com/rails/rails/blob/master/activesupport/lib/active_support/hash_with_indifferent_access.rb for their implementation.

Upvotes: 2

Related Questions