Question

I have a nested form with 3 related models. I want all the fields to be built by my custom form builder PanelFormBuilder. However only the form_for seems to be processed by my form builder and the fields_for doesn’t – it gets processed by the default one. I can’t for the life of me work out why.

This works:

<%= panel_form_for @firm do |f| %>

This doesn’t:

<%= panel_fields_for @firm.company do |c| %>

Here are the custom methods:

module ApplicationHelper
  def panel_form_for(object, options = {}, &block)
    options[:builder] = PanelFormBuilder
    form_for(object, options, &block)
  end

  def panel_fields_for(object, options = {}, &block)
    options[:builder] = PanelFormBuilder
    fields_for(object, options, &block)
  end
end

Here is the custom form builder

class PanelFormBuilder < ActionView::Helpers::FormBuilder
  delegate :content_tag, :tag, to: :@template

  %w[text_field text_area password_field].each do |method_name|
    define_method(method_name) do |name, *args|
      options = args.extract_options!
      options.merge!(:class => "required")
      super(name, *(args + [options]))
    end
  end
end

Can anyone tell me what I am doing wrong?

Thanks

Answer 1

Found my own answer. Turns out I should have been doing this:

<%= panel_form_for @firm do |f| %>

Followed by:

<%= f.fields_for :company do |c| %>

I don’t need the panel_fields_for at all.