similar to: avoiding nil object error?

I am just going through the book and I come across a problem with the code in the app/models: validates_format_of :image_url, :with => %r{^http:.+\.(gif|jpg|png)$}i, :message => "must be a URL for a GIF, JPG, or PNG image" It seems to moan when it''s empty even though I removed :image_url from validates_presence_of. How should I make it optional?

I went throught the "agile web developemnt with rails" and Now I''m trying to ''enhance'' the code with some extra options. When I go to admin/shipping I want to include some data from the products table in with the order info listed. I can''t seem to get this to work. in my partial form I''m trying to add this: <td

Hey, I''ve gotten file_column to upload a file, drop it in the dynamic directory, but I can''t display the image, the directories repeat themselves: My model: class Person < ActiveRecord::Base file_column :image_url In my view: <%= image_tag url_for_file_column(''person'', ''image_url'') %> HTML generated is this: <img

ok, let me show you my "products" fixtures file: ram: id: 1 title: RAM description: ECC RAM Registered, 512MB image_url: images/test.jpg price: 29.95 date_available: 2005-01-25 00:00:00 busted_arsehole: id: 2 title: Busted Arsehole description: I have an arsehole, it is-e busted image_url: images/test.jpg price: 999.95

I have this code in a controller that returns images to my browser...with ROR. def index @products = Product.find_all_ pictures end ....this is the .rhtml.. <% for photo in @pic -%> <div class="entry"> <img src="<%= photo.image_url %>"/> <h3><%= h(photo.title) %></h3> <%= photo.description %>

Is there a ruby embedded code replacement for something like this? <a href="#" onclick="window.open(''http://192.168.78.12:3000/portfolio/show/<%= item.id %>'', ''test'', ''width=660, height=500,resizable=no'')"> <%= image_tag item.image_url, :size => ''200x150'' %></a> Thanks, Dan

Greetings! I''m having a hard time understanding the way Rails handles urls. I''m specifically having real trouble with the image_urls in the Depot app in the Agile Web Development book. If I enter "\image\file.png" in the Add Product page, the image is displayed in the other views and Properties shows http://localhost:3000/images/file.png If I leave off the leading

I am working my way through Agile web development with rails and I''m in the testing chapter. when I run the following test(or any other test) I''m new and not sure where to start looking. require ''test_helper'' class ProductTest < ActiveSupport::TestCase # Replace this with your real tests. test "the truth" do assert true end end I

-----BEGIN PGP SIGNED MESSAGE----- Hash: RIPEMD160 Hello all, I hope someone can help me with this issue, I have the SVN file_column and using LoginEngine/UserEngine with Rails 1.1.2. My issue is that I''m overloading the view for LoginEngine to support a file image upload as part of the user record and having a heck of a time doing so. Near the bottom of my new _edit.rhtml

Hello, I am trying to put multiple items in one column and can''t seem to get the syntax right. These are images and the image url''s are being pulled from a database. It seems that <tr></tr> is the trigger to go onto the next item. Here is the code from the controller: def list @items = Item.find_all end Here is the code from list.rhtml file: <%

Here is my products.yml version_control_book: id: 1 title: Pragmatic Version Control description: How to use version control image_url: /images/sk_svn_small.jpg price: 29.95 date_available: 2005-01-26 00:00:00 automation_book: id: 2 title: Pragmatic Project Automation description: How to automate your project

Hi, I just started learning ruby on rails and I am having hard time with white spacing! Here is the piece of code that will not work: validates_format_of :image_url, :with => %r{\.(gif|jpg|png)$}i, :message => "must be a URL for a GIF, JPG or PNG image" and here is the piece of code that will work: validates_format_of :image_url, :with => %r{\.(gif|jpg|png)$}i, :message

Hello All, I am experiencing the following test unit error working with Rails that I can''t fathom. I have a products.yml file which holds the following test fixture for the products table: dell_pc: id: 1 title: Dell PC description: Dell PC image_url: http://.../pc_image.jpg price: 15000.00 date_available: 2005-12-31 06:53:00 I also have the following product_test.rb file to

I'm trying to find 50 portfolios on the efficient frontier using the Black-Litterman model but have not found a suitable method for doing so. I tried using the "portfoliosFrontier" function given in the package fPortfolio using the "optimalPortfolios.fPort" function on package "BLCOP" but does not provide satisfactory results -- View this message in context:

NOTE: i''ve previously posted it by mistake in test forum :) Hi! I''ve got 2 tables (and models) - one with a product and second with images of this product. How to create a single form (and controller) that will insert/edit data to the product and also add links to images table and add proper product_id? I''ve added "belongs_to :product" to image model and

Here''s what I''m trying to do. I have two divs, one holds about 20 small images of products and the other holds a single large image of one of the products. I''m trying to use the jazzy "new Effect." way of changing images but I can''t seem to get it too work. My script is replacing the image and then making the element disappear. What

Okay so heres my code which works fine, i''ll explain the problem below. <% for num in 1..-04Gazou6+pmm/bHYDwDEOA@public.gmane.org %> <table class="products" id="table1" cellspacing="2" cellpadding="3" border="3"> <tr> <td> <table width="25%"> <tr> <tr> <td><%=

I have a general question about using a Ferret/Lucene index for grouping results. I am not sure how much of the heavy lifting the index can do for me, so I would appreciate any input. I am using ferret to index some objects that have the following properties: url, image_url, price, tags (space separated tags), created_at I would like search the index for any documents that match a specific

guRus Is there a way by which I can search for a particular function or a particular line of code within the maze of all the R codes that are interlinked? Say for instance I am running a code using quantstrat package and on a particular line I get the error saying x is missing in is.array(x). I want to figure out where is.array is in all the codes that my code refers to? How do I do this? Is

I am actually following the instructions/code snippets from "Agile Web Development with Rails" and got as far as page 73 where I did ruby script/generate controller Store index, then edited store_controller.rb to class StoreController < ApplicationController def index @products = Product.salable_items end end and product.rb to: def self.salable_items find(:all,