Ruby on Rails

On Jul 4, 2011, at 2:48 AM, just-a-noob wrote:

> hello everyone, I'm new to rails
> i have some question thats been quite a headache to me, so here it is:
> for example i have this controller & view
> controller
> class OrdersController < ApplicationController
>
>
> def new
> @Order = Order.new
> end
>
> def create
> @Order = Order.new(params[:order])
> if @Order.save
> flash[:notice] = "Successfully created order."
> redirect_to @Order
> else
> render :action => 'new'
> end
> end

Rails (and Ruby) expect instance variables to begin with a lower-case
letter. This may be working for you anyway, but I thought I'd point
out that @Order and @order **mean** fundamentally different things.

>
> View
>
> <% title "Menu Order" %>
> <%= form_for @Order do |f| %>
> <%= f.error_messages %>
>
> <div id="form-order">
> <p>
> <%= f.label :name%><br />
> <%= f.text_field :name, %>
> </p>
> <p>
> <%= f.label :menu_order %><br />
> <%= f.text_field :menu_order %>
> </p>
> </div>
> <%= f.submit %>
>
> my question is :
> before displaying the form above, I want to have a text_field_tag
> that specify how many forms (roughly said, duplicate the form div) I
> want to generate based on count, and then insert the data to the
> database simultaneously,
> This is similar to ryan bates railscasts but they don't meet my
> requirement, i want to use single model, not nested.
> the idea is to speed things up, so that the user don't have to input
> the data only one at a time, but multiple record at single submit
> how do i do that?
> Any suggestions and solutions will be much appreciated
> thanks before :)
>

You're going to need to shift your new and create methods around to
create and expect an array of orders rather than a single order. This
may be very difficult, since it is essentially swimming upstream
against Rails' conventions. You might get a lot more mileage out of
creating a new wrapper model, like Cart, and having it
accept_nested_attributes_for :orders. You can follow the Railscast
that way, which works most excellently. (There are a couple of books
when you build it in Rails 3, mostly to do with the JavaScript stuff
because you'll get double-escaped output if you follow it precisely.
Remember that h is implicit in erb templates now, and you have to mark
the stuff you don't want escaped with .html_safe.)

Walter

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