similar to: Something is wrong with this peice of code...

<div id="cart"> <% if @cart.items.empty? %> style="display: none" <% end %> <%= hidden_div_if(@cart.items.empty?, :id => "cart") %> i dont know how to fix it, iv looked all over the book ruby on rails and cant ever find whats wrong with it... -- Posted via http://www.ruby-forum.com/.

I have attached a screen shot of the error I am running into. I am on page 138 of the Agile Web Development with Rails book by Pragmatic Programmers. I am developing the depot store, and I ran into an error, with hidden_div_if. When I remove that block of code, things to work fine, besides the fact the cart does not display on the site, but everything else functions correctly, so it is

I followed the sample code in AWDR 2 like this: store_helper.rb def hidden_div_if(conditions, attributes = {}) if conditions attributes["style"] = "display:none" else attr = tag_options(attributes.stringify_keys) "<div #{attr}>" end end store.html.erb <%= hidden_div_if(@cart.items.empty?, :id => "cart") %> <%=

Hello, Im trying to understand how this helper method works: def hidden_div_if(condition, attributes = {}) if condition attributes["style"] = "display: none" end attrs = tag_options(attributes.stringify_keys) "<div #{attrs}>" end This is how they are calling it: <%= hidden_div_if(@cart.items.empty?, :id => "cart") %>

<div id="side"> <div id= "cart" line 16----> <% if @cart.items.empty? %> style="display: none" <% end %> <%= hidden_div_if(@cart.items.empty?, :id => "cart") %> Whenever i press on checkout it says....You have a nil object when you didn''t expect it! The error occured while evaluating nil.items,

Great. I''m in the development environment and that is the error message I get?! What good does that do me? I''m trying to follow along with the examples in AWDWR(3rd.), and I have this method in a store controller: private def find_cart Cart.new end That works fine, except that every request(initiated by clicking on an ''add to cart'' button) will

I have a really horrendous problem with sessions. before_filter :find_cart_from_session private def find_cart_from_session if session[:cart] # if there''s is a cart in the session begin @cart = Cart.find(session[:cart]) # return existing or new cart rescue ActiveRecord::RecordNotFound @cart = Cart.create @cart.save session[:cart] = @cart.id

First of all id like to say hi to everyone from Argentina, im yet another Depot first-timer. Going through the example, i got to the point where my cart finally runs Ajax-based. And there is a line where Dave says, after all the job is done "You should see the cart in the sidebar update. And you shouldn''t see your browser show any indication of reloading the page. You''ve

Hi. in the Rails Agile book here''s what was happening: >>> module StoreHelper def hidden_div_if(condition, attributes = {}) if condition attributes["style" ] = "display: none" end attrs = tag_options(attributes.stringify_keys) "<div #{attrs}>" end # format_price method ... end Note that we cheated slightly here. We copied code from the Rails

I have a shopping cart function, and I''d like to set it up to update the cart with AJAX. My AJAX call will return a view that displays the cart items. My question is with regards to keeping things DRY. When the user goes to "view cart", that page needs to display the cart, then the cart display needs to update with AJAX calls when items are added from that page. It would

Hello, Im in the process of working my way through the 2.ed of the agile book. As many of you already know, the book goes through the regular development cycle of the Depot application. I have hit a wall when they started talking about the sessions and the exact mechanics of how an item is added to the session. The code looks like this: depot/app/controllers/store_controller: def add_to_cart

I bought the second edition of the ruby on rails, it seems to work fine now, did some adjustments to the code. But now I get a second error and I want to learn to understand to fix them myself. So here is the error. ArgumentError in StoreController#add_to_cart wrong number of arguments (1 for 0) #{RAILS_ROOT}/app/models/cart.rb:15:in `initialize'' #{RAILS_ROOT}/app/models/cart.rb:15:in

Many of you probably know the ''depot'' app from the ''Agile Rails development'' book. I have constructed the ''products'' model, the Store-controller, and the ''Cart'' and ''Line Item'' classes. I have told Application-controller about :cart and :line_item: model :cart model :line_item Here''s part of

Hi folks, I''m putting together a site that will have a shopping cart tab along the top which, when clicked, slides down to reveal the full contents of the cart (covering the page underneath it). When designing it and getting the styling right, I had the page display the cart fully open by default. This worked fine - the cart can close and open any number of times without problem[1].

I''ve found these two snippets of code useful and would love some feedback. first, .should_have_valid_associations usage: context "A new Product" do specify "should have valid associations" do @product.should_have_valid_associations end end code: (thanks to Wilson/Defiler for converting to rspec) module Spec module Expectations module Should

Hi everybody, I''ve search a lot on google to help me with this one without success. I know that some people had the same problem as I have, but there solutions doesn''t seems to work for me. I''m trying to do the depot example in the AWDwR book. But now I''m stock with a problem that I can''t solve. I get this error: <--- begin error here --->

hi, I have a draggable element (cart-item) in a shopping cart <%= draggable_element "item_#{product}_#{i}", :revert => true %> When this element is dragged outside the cart into the "main_div", I want to show a puff effect and remove the element. When it is dragged within the cart, it should revert. So i wrote this code for drop_receiving _element <%=

Hi all I''m creating a shop page. I have a cart model that looks like the following: class Cart attr_reader :line_items def get_line_item id @line_items.each do |l| return l if l.id == id end end def initialize @line_items = [] end def empty! initialize end def empty? return true if @line_items.empty? false end end And I have some

NameError in StoreController#add_to_cart uninitialized constant StoreController::Cart This is the controller: class StoreController < ApplicationController def index @products = Product.find_products_for_sale end def add_to_cart @cart = find_cart product = Product.find(params[:id]) @cart.add_product(product) end private def find_cart session[:cart] ||=

Help, i''ve been trapped on the tracks here for a day now in the Agile w/ Rails book (latest edition) I can''t get page 115 to display. It says: You have a nil object when you didn''t expect it! You might have expected an instance of Array. The error occured while evaluating nil.each Extracted source (around line #3): 1: <h1> My Agile Cart</h1> 2: