Ruby on Rails

On 4 ene, 13:58, Colin Law <clan...@googlemail.com> wrote:
> On 4 January 2012 16:47, Angelo Cordova <acord...@gmail.com> 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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