Rails - Jan 2012 - How to set different id in nested form attributes

Hi people.

I''m developing a rails 3.0.9 app, I''m using "accept
nested attributes
for" to add dynamically new "child" items to its parent. the
thing is
every child has the same id, and I need every child with its own id,
because I need to make some jquery functions to work with them.

Is there a way to achieve this?

Tanks for your help

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How did all the children end up with the same ID?

Posting some of your problematic code can help us help you.

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On 4 January 2012 16:47, Angelo Cordova
<acordinz-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:
> Hi people.
>
> I''m developing a rails 3.0.9 app, I''m using "accept
nested attributes
> for" to add dynamically new "child" items to its parent. the
thing is
> every child has the same id, and I need every child with its own id,
> because I need to make some jquery functions to work with them.
I presume you are talking about the id in the html rather than the id
of the record in the database.  When you generate the html for the
child, just allocate a new id for each.  Since you have not shown us
how you generate the html it is difficult to comment.

Colin

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On 4 ene, 13:58, Colin Law
<clan...-gM/Ye1E23mwN+BqQ9rBEUg@public.gmane.org>
wrote:
> On 4 January 2012 16:47, Angelo Cordova
<acord...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
>
> > Hi people.
>
> > I''m developing a rails 3.0.9 app, I''m using
"accept nested attributes
> > for" to add dynamically new "child" items to its
parent. the thing is
> > every child has the same id, and I need every child with its own id,
> > because I need to make some jquery functions to work with them.
>
> I presume you are talking about the id in the html rather than the id
> of the record in the database.  When you generate the html for the
> child, just allocate a new id for each.  Since you have not shown us
> how you generate the html it is difficult to comment.
>
> Colin
Yes, I''m not saying that the DB id is the same, I''m saying the
html
attribute "id" is the same, sorry for that.
But I don''t know how to set a different id for each child.

I''m using nested attributes in this way, to simplify I will use
"document" and "products", where a "document" has
many "products":

app/models/document

class Document < ActiveRecord::Base
  has_many :details,:class_name => ''Product'', :foreign_key
=>
''document_id'', :dependent => :destroy
  accepts_nested_attributes_for :details, :allow_destroy => :true
end

app/models/product

class Product < ActiveRecord::Base
  belongs_to :document :foreign_key => ''document_id''
end


app/controllers/documents

class DocumentsController < ApplicationController

  def index...

  def show...

  def new
    @document = Document.new
    @document.products.build
    respond_to do |format|
      format.html # new.html.erb
      format.xml  { render :xml => @document }
    end
  end

  def...
  ...
  ..
end


app/views/documents/_form

<%= form_for @document do |f| %>

(document fields such as number, provider, date, etc)

<h3>Products</h3>
                <div class="details">
                <% if @document.id %>
                  <%= f.fields_for :details do |d| %>
                    <%= render "details", :f => d %>
                  <% end %>
                <% end %>
                <%= link_to_add_fields "+ Add Product", f, :details
%>
                </div>
...
...
(button for "submit")

<% end %>

app/views/documents/_details

<div class="fields">

    <%= f.label :product %>&nbsp;
    <%= f.collection_select(:document_id, Document.all, :id, :number,
options = {:prompt => ''''},:class => ''_prod
select sbig'') %>

    <%= link_to_remove_fields "remove product", f %>

</div>


app/helpers/applicationhelper

module ApplicationHelper
  def link_to_remove_fields(name, f)
		f.hidden_field(:_destroy) + link_to_function(name,
"remove_fields(this)")
	end

def link_to_add_fields(name, f, association)
    new_object f.object.class.reflect_on_association(association).klass.new
    fields = f.fields_for(association, new_object, :child_index =>
"new_#{association}") do |builder|
      render(association.to_s.singularize, :f => builder)
    end
    link_to_function(name, ("add_fields(this,
''#{association}'',
''#{escape_javascript(fields)}'')"))
  end
end


public/javascripts/application.js

function remove_fields(link) {
  $(link).prev("input[type=hidden]").val("1");
  $(link).closest(".fields").hide();
}

function add_fields(link, association, content) {
  var new_id = new Date().getTime();
  var regexp = new RegExp("new_" + association, "g")
  $(link).parent().before(content.replace(regexp, new_id));
}

So, in _details, I didn''t set an id (html attribute) for product but
If I check with firebug, The id is the same for each "detail", if I
try to set manually, obviously, each "detail" get the same id.

Please, help me

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I already solve this

I''m really sorry, I''ve just realized that every child had its
own
"id", so it was easier to get it solved.

Thanks for your help and for sharing your time




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