Rails - Feb 2008 - How can I dynamically create this form?

Hi,

I have a model, ec_order, with many of another model, ec_line_item.  I
have a page where users can dynamically add line items to their
order.

===============Begin new.rhtml=================<% form_for :ec_order, :url
=> ''summary'' do |f| %>
        <div id="ec_line_items">
        <%= render :partial => ''ec_line_item'',
:collection =>
@ec_order.ec_line_items %>
        </div>
        <%= add_item_link "Add an item" %>
        <%= submit_tag("Submit Form") %>
<% end %>
===============End new.rhtml===================
If a user submits an order and there are some problems, I redirect
them back to the page above.  My question is, how can I make sure the
user sees the same number of items that they had when they submitted
the form?

Here are the two controller methods in question.

        def new
                @user = User.find(session[:user_id])
                1.times { @ec_order.ec_line_items.build }
        end

        def summary
                @ec_order = EcOrder.new(params[:ec_order])
                if (!@ec_order.valid?)
                        flash[:notice] = "Order is invalid."
                        redirect_to :action => ''new''
                else
                        session[:ec_order] = @ec_order
                end
        end


Thanks, - Dave


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hi Dave,

you could try this

instead of submitting to url=>"summary", take that line out...so
that it
will submit to new.rhtml automatically....then make your new action look 
something like this:

       def new
                @user = User.find(session[:user_id])
                if request.post?
                     @ec_order = params[:ec_order]
                     if(!@ec_order.valid?)
                        flash[:notice] = "Order is invalid"
                     else
                        session[:ec_order] = @ec_order
                     end

               1.times { @ec_order.ec_line_items.build }  <<<< sorry
not
sure what this line does
        end

Re the session[:ec_order] thing, I''m not sure why you''re doing
that, do
you know that if the variable in the action is an instance variable, 
i.e. has an @ at the front, then it can be seen in the view....?
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oops missed an extra ''end'' out there to close the main if
statement
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Hi Phil,

Thanks for your input.  The reason I had an intermediate "summary"
screen was because I wanted the user to be able to confirm what they
were ordering before they locked themselves in.  I would prefer to
keep the summary view code and the new view code separate, but if the
only way to get what I want is to combine them, I''m willing to do
that.

The reason for this line

1.times { @ec_order.ec_line_items.build }

which I got from a Railscast tutorial, is so that when the user first
sees the order form page, there is at least one line item displayed.
If I remove this line, there are no items displayed.

 - Dave



On Feb 14, 2:11 pm, Phil Tayo
<rails-mailing-l...-ARtvInVfO7ksV2N9l4h3zg@public.gmane.org>
wrote:
> oops missed an extra ''end'' out there to close the main if
statement
> --
> Posted viahttp://www.ruby-forum.com/.
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