Method: Attributor::Hash.example_contents

Defined in:

lib/attributor/types/hash.rb

.example_contents(context, parent, **values) ⇒ Object

# File 'lib/attributor/types/hash.rb', line 189

def self.example_contents(context, parent, **values)
  hash = ::Hash.new
  example_depth = context.size
  # Be smart about what attributes to use for the example: i.e. have into account complex requirements
  # that might have been defined in the hash like at_most(1).of ..., exactly(2).of ...etc.
  # But play it safe and default to the previous behavior in case there is any error processing them
  # ( that is until the SmartAttributeSelector class isn't fully tested and ready for prime time)
  begin
    stack = SmartAttributeSelector.new( requirements.map(&:describe), keys.keys , values)
    selected = stack.process
  rescue => e
    selected = keys.keys
  end

  keys.select{|n,attr| selected.include? n}.each do |sub_attribute_name, sub_attribute|
    if sub_attribute.attributes
      # TODO: add option to raise an exception in this case?
      next if example_depth > MAX_EXAMPLE_DEPTH
    end

    sub_context = generate_subcontext(context, sub_attribute_name)
    block = proc do
      value = values.fetch(sub_attribute_name) do
        sub_attribute.example(sub_context, parent: parent)
      end
      sub_attribute.load(value, sub_context)
    end

    hash[sub_attribute_name] = block
  end

  hash
end