Question

I’m trying to use Hash object like as ActiveRecord Model within FormHelper:

<% hash = { :some_key => 'some_value' } %>

<% fields_for "hash", hash do |f| %>

  <%= f.text_field :some_key %>

<% end %>

As far as I know, its trying to call :some_key method for hash object. I was trying to override ‘send’ method for Hash class but have no luck:

def send( symbol, args = [] )
  if self.has_key?( symbol )
    self[ symbol ]
  elsif self.has_key?( symbol.to_s )
    self[ symbol.to_s ]
  else
    super
  end
end

Have you any ideas how could I play with this?

Thanks for your help.

Answer 1

Many thanks to KL-7 for his proposition of OpenStruct. So, if someone need this, I’m adding here full working example.

class Model < ActiveRecord::Base

  HASH_ATTRIBUTE_DEFAULT = {
    :value => '',
    :selected => 0
  }

  serialize :hash_attribute, Hash

  def hash_attribute
    read_attribute( :hash_attribute ) || HASH_ATTRIBUTE_DEFAULT
  end

  def hash_attribute=( hash )
    write_attribute( :hash_attribute, hash ) unless hash.nil?
  end

end

And now it’s time for OpenStruct:

<% fields_for "model[hash_attribute]", OpenStruct.new( @model.hash_attribute ) do |f| %>

  <%= f.text_field :value %>
  <%= f.check_box :selected %>

<% end %>