I want to know this too. Did you find out?
On Wednesday, March 21, 2012 2:12:09 PM UTC-7, John Merlino wrote:
>
> Hey all,
>
> I looked at source code for fields_for:
>
> def fields_for(record_name, record_object = nil, fields_options = {},
> &block)
> fields_options, record_object = record_object, nil if
> record_object.is_a?(Hash) && record_object.extractable_options?
> fields_options[:builder] ||= options[:builder]
> fields_options[:parent_builder] = self
> fields_options[:namespace] =
> fields_options[:parent_builder].options[:namespace]
>
> case record_name
> when String, Symbol
> if nested_attributes_association?(record_name)
> return fields_for_with_nested_attributes(record_name,
> record_object, fields_options, block)
> end
> else
> record_object = record_name.is_a?(Array) ? record_name.last :
> record_name
> record_name = ActiveModel::Naming.param_key(record_object)
> end
>
> index = if options.has_key?(:index)
> "[#{options[:index]}]"
> elsif defined?(@auto_index)
> self.object_name = @object_name.to_s.sub(%r\[\]$/,"")
> "[#{@auto_index}]"
> end
> record_name = "#{object_name}#{index}[#{record_name}]"
>
> @template.fields_for(record_name, record_object, fields_options,
> &block)
> end
>
> Notice this part:
>
> options[:builder]
>
> this options hash is no where to be defined. In argument list, there's
> only a fields_options hash. Reason why this matters to me is because I
> am trying to override this method in my application_helper.rb in order
> to extend it.
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