Recent Comments - RailsCasts

paulomonteiro on #273 Geocoder 2011-07-04 09:38:09

Someone know how can I set intersections?

AdolfoFermo on #182 Cropping Images 2011-07-04 08:19:08

@Kevin you could solve the problem?! I thin that we have the same issue, because when i update the picture, i got a blank screen, it doesnt take me to crop.html.erb. When i refresh that blank screen i got the new updated picture. Could you help me please?

Thanks in advance!

Andy L on #273 Geocoder 2011-07-04 07:50:07

Here's another way to work with Google Maps: jquery-ui-map - a jQuery plugin.

http://code.google.com/p/jquery-ui-map/

Branden Silva on #273 Geocoder 2011-07-04 06:17:06

I was wondering the same thing. Both look like they are done well but GeoKit seems like its been around a lot longer than Geocoder, but I could be wrong.

Martin Jarvis on #273 Geocoder 2011-07-04 04:46:04

What's the difference between Geocoder and GeoKit? I've used GeoKit before and found it very good.

S on #273 Geocoder 2011-07-04 02:27:02

Keep in mind that doing geocode server side is not a best practice.
Google API limit is 2500 req/day (and decrease every year :))
Should be done client side with plugin like this: https://github.com/sgruhier/jquery-addresspicker

Lee Farrell on #260 Messaging with Faye 2011-07-04 01:07:01

ah, ok, yes I see that now, thanks!

Xavier Lozinguez on #263 Client Side Validations 2011-07-03 13:26:01

Same here, any luck solving the issue?

hounddog on #237 Dynamic attr_accessible 2011-07-03 09:44:09

Not sure why, but I can't get this to work unless I accept an argument in the mass_assignment_authorizer method located in the initializer. If I do it like the below everything works.

def mass_assignment_authorizer(a=nil)

Perhaps this has changed in Rails 3.1.0.rc4..

irb(main):011:0> Rails.version
=> "3.1.0.rc4"

Thanks for this post Ryan.
Mark

Kieran P on #260 Messaging with Faye 2011-07-03 03:18:03

FAYE_TOKEN isn't in the source javascript. It's a token used on two backend servers which communicate between each other. The end user never sees, sends or intercepts that communication.

Paolo on #272 Markdown with Redcarpet 2011-07-02 05:42:05

Also this:
http://github.com/trevorturk/pygments

Cayce Balara on #271 Resque 2011-07-01 13:18:01

Killer preso, as always. Beyond the obvious stellar info on Resque, the pointer to the pygments syntaxer was a great take-away for me. Thanks, Ryan.

nessur on #271 Resque 2011-07-01 09:54:09

Anyone figure out what this problem is?

I'm running rails 3.0.9, ruby 1.8.7, with passenger.

Seth Vargo on #254 Pagination with Kaminari 2011-07-01 08:26:08

Kaminari is also SEO-friendly! Add a route like this:

resources :products do
  get 'page/:page', :action => :index, :on => :collection
end

And Rails will automatically rewrite your URLs to be SEO-friendly! Instead of /products?page=32, you'll have a nicer URL - /products/page/32. Because of this, you can also leverage on some page-caching techniques if your index isn't updated frequently.

macksolo on #265 Rails 3.1 Overview 2011-06-30 19:06:07

Awesome as usual! Thx. Have you tried deploying your app in production mode under RC4 ? Everything worked exactly the same for me under development but when I switched to production I got this error with web brick:

Processing by ProjectsController#index as HTML

Rendered projects/index.html.erb within layouts/application (24.4ms)
Compiled app/assets/stylesheets/application.css (1ms) (pid 45323)
...

Compiled app/assets/javascripts/projects.js.coffee (116ms) (pid 45323)
Completed 500 Internal Server Error in 377ms

and finally:

ActionView::Template::Error (uninitialized constant JSON::ParserError
(in /opt/nginx/apps/todo/app/assets/javascripts/application.js)):
3:
4: Todo
5: <%= stylesheet_link_tag "application" %>
6: <%= javascript_include_tag "application" %>
7: <%= csrf_meta_tags %>
8:
9:
app/views/layouts/application.html.erb:6:in _app_views_layouts_application_html_erb__2079688217135001494_17202399760' app/controllers/projects_controller.rb:7:inindex'

Chuck Vose on #271 Resque 2011-06-30 12:52:12

Fantastic intro, we just started using resque and I was going to have to learn it the hard way. But then you show up with a great screencast and now I get to take a long lunch. :)

Thanks Ryan!

Nate Bird on #221 Subdomains in Rails 3 2011-06-30 08:22:08

No need for lvh.me in development if you are using Pow. It handles subdomains automatically.

Nate Bird on #221 Subdomains in Rails 3 2011-06-30 08:21:08

Ryan has an example of setting the subdomain to false in the show notes. You can use it like this.

= link_to "terms", terms_path(:subdomain => false)`

Jonas M on #272 Markdown with Redcarpet 2011-06-30 02:15:02

It seems there are workarounds: http://pygments.heroku.com/

Bill Christian on #272 Markdown with Redcarpet 2011-06-29 17:49:05

Is there a ruby alternative to pigments? Seems strange to use a python library.

Anthony Porthouse on #272 Markdown with Redcarpet 2011-06-29 15:45:03

I too can verify this problem exists with the code Ryan. The outputted code looks like the following for me.

          html
        
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" "http://www.w3.org/TR/REC-html40/loose.dtd"> 
<html><body> 
<p>This is a <strong>markdown</strong> enabled text</p> 
 
<div class="highlight"> 
<pre><span class="nb">puts</span> <span class="s2">"Hello World"</span> 
</pre> 
</div> 
</body></html>

Using Nokogiri 1.4.6

pradeep on #217 Multistep Forms 2011-06-29 08:32:08

I'm getting the same error. I hope u still remember how did u overcome with this problem...

first-developer on #268 Sass Basics 2011-06-29 01:14:01

Please who can i specify the path for scss files and the related css path for the compiled file ? in rails 3.0.7
How can use sass manualy to generate css files when i was in for exemple in Appcontroller ? which steps should i have to follow to do this with sass (Rails 3.0.7)

Thanks a lot :)

Peter Wang on #272 Markdown with Redcarpet 2011-06-29 01:13:01

Again, Just awesome, and Just in time.???

Jesse L. Zamora on #254 Pagination with Kaminari 2011-06-28 16:59:04

Wow! This rocks! I was getting tired of will_paginate, especially not knowing if at any point the rails3 branch was going to screw up on me. I definitely recommend Kaminari over will_paginate any day! And it's not any harder to implement either......

AdolfoFermo on #134 Paperclip 2011-06-28 15:58:03

If you are on Windows, the solution for the 'identity' issue its to create a paperclip.rb in the initializers folder and type:

require "paperclip"

Paperclip.options[:command_path] = 'C:\ImageMagick-6.7.0-Q16'
Paperclip.options[:swallow_stderr] = false

Obviously check for the path where you installed the ImgMagick and the version, mine its 6.7.0 and worked fine in a x64 system...

Chris Ledet on #272 Markdown with Redcarpet 2011-06-28 12:27:12

Great screencast. Thanks Ryan.

Alex on #272 Markdown with Redcarpet 2011-06-28 07:10:07

@Paolo, Heroku can't use pygments.

Orban Botond on #257 Request Specs and Capybara 2011-06-28 06:39:06

Hi Jeroen,

You can run your selenium tests on a server without a GUI in background by using a virtual frame buffer called Xvfb. There you will find usage information.
Hopefully I helped you. :)

Botond

Paolo on #272 Markdown with Redcarpet 2011-06-28 01:32:01

Thanks Ryan.

Is it possible to use pygments on Heroku?

Tom Pesman on #272 Markdown with Redcarpet 2011-06-28 00:19:12

Last night I've done some testing on an Ubuntu installation with the same results. I've modified the Nokogiri part so it will (hopefully) work on both installations. I've used the DocumentFragment class of Nokogiri.

          ruby
        
def syntax_highlighter(html)
  doc = Nokogiri::HTML::DocumentFragment.parse(html)
  doc.css("pre[@lang]").each do |pre|
    pre.replace Albino.colorize(pre.text.rstrip, pre[:lang])
  end
  doc.to_s
end 

Coops on #272 Markdown with Redcarpet 2011-06-27 23:43:11

I am getting the following error in my log when i try and use ruby block...

ActionView::TemplateError (No such file or directory - posix_spawnp)

Any ideas why? or how to fix?

:D

Alex on #272 Markdown with Redcarpet 2011-06-27 22:55:10

Thanks for your screen.

A Markdown TextEditor with markitup and redcarpet ,support rails 3

https://github.com/ZhangHanDong/rails_markitup

Daniel Martin on #270 Authentication in Rails 3.1 2011-06-27 22:37:10

Use BCrypt::Password.create() instead of BCrypt::Engine and the library takes care of the salt for you:

          ruby
        
def create(secret, options = { :cost => BCrypt::Engine::DEFAULT_COST })
  Password.new(BCrypt::Engine.hash_secret(secret, BCrypt::Engine.generate_salt(options[:cost]), options[:cost]))
end

http://bcrypt-ruby.rubyforge.org/classes/BCrypt/Password.html#M000007

Les on #272 Markdown with Redcarpet 2011-06-27 12:59:12

Another great cast. You have an uncanny ability to cover topics as I need them. I got RedCloth going this morning, but upon seeing this cast I will be switching ASAP. Thanks Ryan!

nessur on #271 Resque 2011-06-27 12:48:12

This last part starts redis in the foreground?

Maybe my Ubuntu config is disagreeable somewhere.

Lee Jarvis on #272 Markdown with Redcarpet 2011-06-27 12:02:12

It works fine here, the only difference is I'm using libxml version 2.7.8. Perhaps try updating libxml, I know nokogiri has had issues with some past versions

Tom Pesman on #272 Markdown with Redcarpet 2011-06-27 11:36:11

If I use rails c with Nokogiri::HTML("<p>content</p>").to_s

it will output: "<!DOCTYPE html PUBLIC \"-//W3C//DTD HTML 4.0 Transitional//EN\" \"http://www.w3.org/TR/REC-html40/loose.dtd\">\n<html><body><p>content</p></body></html>\n"

I'm using Nokogiri version 1.4.6, maybe it's something with the libraries Nokogiri uses?

When I give the /Library/Ruby/Gems/1.8/bin/nokogiri -v command I get:

warnings: []
ruby:
engine: mri
version: 1.8.7
description: ruby 1.8.7 (2009-06-12 patchlevel 174) [universal-darwin10.0]
platform: universal-darwin10.0
libxml:
loaded: 2.7.3
binding: extension
compiled: 2.7.3
nokogiri: 1.4.6

ac74394 on #272 Markdown with Redcarpet 2011-06-27 10:53:10

Love the 'casts...Thanks, Ryan!

Ryan Bates on #272 Markdown with Redcarpet 2011-06-27 10:50:10

That is very strange, it is not behaving this way for me. Maybe it's a different version of Nokogiri, what version are you using? I am using 1.4.6 in the screencast.

Ryan Bates on #272 Markdown with Redcarpet 2011-06-27 10:39:10

I prefer not to add these kinds of abstractions until I need them. Usually if I need to customize the options it will be to add or remove one option which will cause a lot of duplication. I think this kind of abstraction would be better, but too much to show in the episode.

          ruby
        
def markdown(text, options = {})
  options.reverse_merge!(
    :hard_wrap => true,
    :filter_html => true,
    :autolink => true,
    :no_intraemphasis => true,
    :fenced_code => true,
    :gh_blockcode => true,
  )
  options.reject! { |k, v| !v }
  syntax_highlighter(Redcarpet.new(text, *options.keys).to_html).html_safe
end

Then you pass true/false options hash to modify the defaults. But the point is there are different ways to abstract this out, and we can't tell the best way without seeing how it needs to be customized.

Tom Pesman on #272 Markdown with Redcarpet 2011-06-27 08:00:08

Hello Ryan,

Thanks for the screencast! When I use your example or the source code Nokogiri inserts HTML headers to the output of the syntax_highlighter method. I've fixed it by modifying the last line of that method.

          ruby
        
def syntax_highlighter(html)
  doc = Nokogiri::HTML(html)
  doc.search("//pre[@lang]").each do |pre|
    pre.replace Albino.colorize(pre.text.rstrip, pre[:lang])
  end
  doc.at_css("body").inner_html.to_s
end

Why is it that the output in the screencast is different?

Ainars on #272 Markdown with Redcarpet 2011-06-27 05:42:05

actually I needed to replace FolderRef.tiff, the old one is out of date, for those who use Snow Leopard... and @Ryan all your screencasts are great! :)

Lee Jarvis on #272 Markdown with Redcarpet 2011-06-27 04:36:04

@Ainars Same old icon? Not sure if you're referring to how Ryans drawer looks like, but he's using the TextMate MissingDrawer plugin.

Ryan, thanks for the plug. Create episode as always!

Ainars on #272 Markdown with Redcarpet 2011-06-27 03:02:03

Hi Ryan and all,
how can I get in my textmate to show up new folder icon, I've tried everything I still get the same old icon, I'm using TM 1.5.9

Jim Ruther Nill on #272 Markdown with Redcarpet 2011-06-27 01:18:01

I think Ryan just wanted to demonstrate a basic helper so he didn't do it the way you described. Of course, yours is much more flexible than Ryan's version.

Mohammad El-Abid on #272 Markdown with Redcarpet 2011-06-27 01:13:01

How come you didn't do something like this? Was there any reason?

          ruby
        
def markdown(text, options = nil)
  options ||= [:hard_wrap, :filter_html, :autolink, :no_intraemphasis, :fenced_code, :gh_blockcode]
  syntax_highlighter(Redcarpet.new(text, *options).to_html).html_safe
end

Simon (Big Chief) Morley on #197 Nested Model Form Part 2 2011-06-26 13:06:01

Hi, this was fantastic but when pasting the code to add a question, I get a missing partial error! Taking out the following gets rid of the error??

<%= link_to_add_fields "Add Item", f, :questions %>

Bill Kiskin on #210 Customizing Devise 2011-06-26 10:34:10

Hi Ryan, and thanks fpr the nice 'cast. As I used it everything went well..

But now, I am writing a server API call for the iPhone that will allow a user to log in via their email and password and return the auth_token, in the event that it gets "lost" (ie. new iPhone, app gets un-installed, etc) so that the app can store it in the device for authentication, where we normally pass

www.mydomain.com?auth_token=blah-blah

for all of the authentications on the calls we make

In rails remote API call:

user = User.where(:email => data['email'], :password =>
data['password']).firstuser = User.where(:email =>
data['email'], :password => data['password']).first

I need to "intercept" the Devise hidden controllers to be able to post the remote login call to my server and RETURN the authentication_token as the API response so that it can then be stored in the mobile device and used for subsequent
calls.

Does anybody have any ideas how I might do this?

Thanks,

Bill

jack dempsey on #271 Resque 2011-06-26 01:52:01

I get the layout, but intermittently. Some refreshes don't request the style.css file for some reason. Not sure what's going on--has that happened to you at all Ryan?