Rails Forum - Ruby on Rails Help and Discussion Forum - fields_for need index of loop

Re: fields_for need index of loop

dummy@example.com (rob-twf) — Sun, 22 Aug 2010 22:18:46 +0000

Turns out that may not be the best idea, when you call the method it increments the counter which will cause problems with your form.

There's a ticket about this here with a patch and a suggested workaround:

f.object_name.gsub(/[^0-9]+/,'')

Re: fields_for need index of loop

dummy@example.com (gmcc) — Sat, 21 Aug 2010 03:41:41 +0000

Thanks.
I tried your suggestion, it says that the method private...

private method `nested_child_index' called for #

I have heard you can work around that. I will look into that.

Re: fields_for need index of loop

dummy@example.com (rob-twf) — Fri, 20 Aug 2010 20:52:30 +0000

nested_child_index looks like it might do the job:

<%= link_to_function("today", "set_today(#{f.nested_child_index},'pos_date')", :class => "today_link")  %>

fields_for need index of loop

dummy@example.com (gmcc) — Fri, 20 Aug 2010 20:19:09 +0000

hi,

I need the "counter" for my fields_for loop to plug into a javascript function in the partial.

VIEW:
<% f.fields_for :trans_products do |builder| %>
<%= render 'trans_product_fields', :f => builder %>
<% end %>

f is a transaction, trans_products belongs_to transaction, transaction accepts_nested_attributes_for trans_products.

so in the PARTIAL:

<%= f.text_field :po, :class => 'prodinfo' %>
<%= f.text_field :so, :class => 'prodinfo' %>
<%= f.text_field :product, :class => 'prodinfo' %>
<%= f.text_field :serial, :class => 'prodinfo' %>
<%= f.date_select :pos_date, :include_blank => true, :order => [:month, :day, :year] %>
<%= link_to_function("today", "set_today(#{?????},'pos_date')", :class => "today_link") %>
<%= link_to_remove_product "remove", f %>

the ???? should read transaction_trans_products_attributes_#number#, #number# shows up correctly for the textfields, the po text field reads id="transaction_trans_products_attributes_0_po" the next trans_product row has id="transaction_trans_products_attributes_1_po"

how can i get this counter value into my link_to_function parameter?