See the blue info box [here][1]:

&gt; By default dynamic segments don’t
&gt; accept dots – this is because the dot
&gt; is used as a separator for formatted
&gt; routes. If you need to use a dot
&gt; within a dynamic segment add a
&gt; constraint which overrides this – for
&gt; example `:id =&gt; /[^\/]+/` allows
&gt; anything except a slash.

That would for example be:

    get &quot;/:user/contributions&quot; =&gt; &#39;users#contributions&#39;, :constraints =&gt; { :user =&gt; /[^\/]+/ }

  [1]: http://guides.rubyonrails.org/routing.html#specifying-constraints

If your variable segment is the last one, then using the `[^\/]` regex will also eat the format. In such a case rather use:

    /([^\/]+?)(?=\.json|\.html|$|\/)/

Looks like the following link answers your question.

http://avdi.org/devblog/2010/06/18/rails-3-resource-routes-with-dots-or-how-to-make-a-ruby-developer-go-a-little-bit-insane/  

I have a GridView with a `DataSource` (SQL Database). I want to hide a column, but still be able to access the value when I select the record. Can someone show me how to do this?

This is the column I want to hide and still want to access its value:

    &lt;asp:BoundField DataField=&quot;Outlook_ID&quot; HeaderText=&quot;OutlookID&quot; /&gt;
I tried everything to hide the column (property `Visible=&quot;false&quot;`), but I can&#39;t access its value.

How to hide a column (GridView) but still access its value?

I know the difference between the two on a technical level.

But in real life, can anyone provide examples (the more the better) of applications (uses) of TCP and UDP to demonstrate the difference?

What are examples of TCP and UDP in real life?

I&#39;ve got an route for my users like `/iGEL/contributions`, which works fine. But now a user registered with a name like &#39;A.and.B.&#39;, and now the route fails to match, since the name contains dots.

My route:

    get &quot;/:user/contributions&quot; =&gt; &#39;users#contributions&#39;

Any ideas?

Why do routes with a dot in a parameter fail to match?

I've got an route for my users like <code>/iGEL/contributions</code>, which works fine. But now a user registered with a name like 'A.and.B.', and now the route fails to match, since the name contains dots.
My route:
<pre><code class="hljs language-arduino">get "/:user/contributions" => 'users#contributions'
</code></pre>
Any ideas?

I am launching a beta site with a select group of users. I want to disable registration in the production environment only, and only for a short period of time (i.e. I don&#39;t want to nuke my registration altogether). I know I can simply hide the &quot;sign up&quot; link, but I suspect that hackers smarter than I can still use the RESTful routes to accomplish registrations. What&#39;s the best way to disable registration so my test/development environments still work, but production is affected? Thanks for any pointers.

I&#39;ve tried pointing named scopes in such a way that &quot;sign_up&quot; goes to &quot;sign_in&quot;, but it didn&#39;t work. Here&#39;s what I&#39;ve tried:

    devise_scope :user do
        get &quot;users/sign_in&quot;, :to =&gt; &quot;devise/sessions#new&quot;, :as =&gt; :sign_in
        get &quot;users/sign_up&quot;, :to =&gt; &quot;devise/sessions#new&quot;, :as =&gt; :sign_up
    end

Ideally, we&#39;d send the user to a &quot;pages#registration_disabled&quot; page or something like that. I just wanted to get something working I can play around with.

EDIT:
I&#39;ve changed the model as requested, then added the following to /spec/user_spec.rb

    describe &quot;validations&quot; do
        it &quot;should fail registration if in production mode&quot; do
          ENV[&#39;RAILS_ENV&#39;] = &quot;production&quot;
          @user = Factory(:user).should_not be_valid
        end
    end

it is passing as &quot;true&quot; rather than false. Is there a way to mock up the production environment? I&#39;m just spit-balling this one. 

Thanks!

disabling Devise registration for production environment only

How can you have a hidden field with simple form?

The following code:

    = simple_form_for @movie do |f|
      = f.hidden :title, &quot;some value&quot;
      = f.button :submit

results in this error:

    undefined method `hidden&#39; for #SimpleForm::FormBuilder:0x000001042b7cd0

rails simple_form - hidden field - create?

I&#39;ve tried [this][1] but it didn&#39;t work and seemed to be for osx. I have a fresh Ubuntu 10.10 install with rvm, rails 3 and ruby 1.9.2. I have a fresh rails app but using either gem or rails results in the following warnings (with lag). 

$  ***rails -v***

    /home/chance/.rvm/gems/ruby-1.9.2-p180@global/gems/railties-3.0.5/lib/rails/script_rails_loader.rb:11: warning: Insecure world writable dir /home/chance in PATH, mode 040777
    /home/chance/.rvm/gems/ruby-1.9.2-p180@global/gems/bundler-1.0.10/lib/bundler/runtime.rb:136: warning: Insecure world writable dir /home/chance in PATH, mode 040777
    Rails 3.0.5
***
$ **_gem -v_** 

    /home/chance/.rvm/rubies/ruby-1.9.2-p180/bin/gem:4: warning: Insecure world writable dir /home/chance in PATH, mode 040777
    1.6.2

Just incase it matters, here is my Gemfile:

    source &#39;http://rubygems.org&#39;
    
    gem &#39;rails&#39;
    # Bundle edge Rails instead:
    # gem &#39;rails&#39;, :git =&gt; &#39;git://github.com/rails/rails.git&#39;
    gem &#39;sqlite3&#39;
    gem &#39;sqlite3-ruby&#39;, :require =&gt; &#39;sqlite3&#39;
    gem &quot;haml&quot;
    gem &quot;formtastic&quot;
    gem &quot;will_paginate&quot;
    gem &quot;devise&quot;
    gem &quot;delayed_job&quot;
    gem &quot;whenever&quot;
    gem &quot;memcache-client&quot;
    gem &quot;capistrano&quot;
    group :testing do
      gem &quot;rspec&quot;
      gem &quot;rspec-rails&quot;
      gem &quot;autotest-standalone&quot;
      gem &quot;autotest-rails&quot;
      gem &quot;autotest-growl&quot;
      gem &quot;mocha&quot;
      gem &quot;shoulda&quot;
      gem &quot;factory_girl_rails&quot;
    end
    
    group :development do
      gem &quot;cheat&quot;
      gem &quot;bullet&quot;
      gem &quot;ruby-growl&quot;
    
    end
    
    


  [1]: https://stackoverflow.com/questions/3952243/warning-insecure-world-writable-dir

Getting the warning &quot;Insecure world writable dir /home/chance &quot; in PATH, mode 040777 for rails and gem

Rails has introduced new way to validate attributes inside model. 
When I use

    validates :title, :presence =&gt; true

it works but when I try to add a custom message

    validates :title, :presence =&gt; true,:message =&gt; &quot;Story title is required&quot;

an error is generated 

    Unknown validator: &#39;message&#39;

validation custom message for rails 3

How do I use Capybara to check that a select box has certain values listed as options?
It has to be compatible with Selenium...

This is the HTML that I have:

    &lt;select id=&quot;cars&quot;&gt; 
      &lt;option&gt;&lt;/option&gt;
      &lt;option value=&quot;volvo&quot;&gt;Volvo&lt;/option&gt;
      &lt;option value=&quot;saab&quot;&gt;Saab&lt;/option&gt;
      &lt;option value=&quot;mercedes&quot;&gt;Mercedes&lt;/option&gt;
      &lt;option value=&quot;audi&quot;&gt;Audi&lt;/option&gt;
    &lt;/select&gt;

This is what I want to do:

    Then the &quot;cars&quot; field should contain the option &quot;audi&quot;

Check select box has certain options with Capybara

How can I find records in my database on a not equal condition?  I have this now, but is there a fancy rails-speak way of doing it?

    GroupUser.where(&#39;user_id != ?&#39;,me)


Rails Model find where not equal

The following `attempt_login` method is called using Ajax after a login form is submitted.

    class AccessController &lt; ApplicationController
      [...]
      def attempt_login
        authorized_user = User.authenticate(params[:username], params[:password])
        
        if authorized_user
          session[:user_id] = authorized_user.id
          session[:username] = authorized_user.username
          flash[:notice] = &quot;Hello #{authorized_user.name}.&quot;
          redirect_to(:controller =&gt; &#39;jobs&#39;, :action =&gt; &#39;index&#39;)
        else
          [...]
        end
      end
    end

The problem is that `redirect_to` doesn&#39;t work.

How would you solve this ?

Rails 3: How to &quot;redirect_to&quot; in Ajax call?

I have a simple model that mounts a Carrierwave uploader. Everything works fine in development, but I get an undefined method &quot;image_will_change!&quot; error on heroku.

    class Receipt &lt; ActiveRecord::Base
      mount_uploader :image, ImageUploader
    end

    class ImageUploader &lt; CarrierWave::Uploader::Base
      storage :fog
      def store_dir
        &quot;receipts/saved&quot;
      end
    end

I have the cache_dir set appropriately as well according to the Carrierwave Wiki. 

    receipt.image = File.open &quot;public/images/test.jpg&quot; #works fine in development, fails in heroku


Undefined method `image_will_change!&#39; for CarrierWave on Heroku

How can I route `/foo` to display `/public/foo.html` in Rails?

Routing to static html page in /public

I am receiving the rather self explanatory error:

&gt;A potentially dangerous Request.Path value was detected from the client (*).

The issue is due to `*` in the request URL:

    https://stackoverflow.com/Search/test*/0/1/10/1

This url is used to populate a search page where &#39;test*&#39; is the search term and the rest of the url relates to various other filters.

Is there an easy way to allow these special characters in the URL? I&#39;ve tried modifying the `web.config`, to no avail.

Should I manually encode / decode the special characters?
Or is there a best practice for doing this, I would like to avoid using query strings. - but it may be an option.

The application itself is a `c# asp.net` webforms application that uses routing to produce the nice URL above.


A potentially dangerous Request.Path value was detected from the client (*)

I am currently trying to get started with Akka and I am facing a weird problem. I&#39;ve got the following code for my Actor:

    class AkkaWorkerFT extends Actor {
      def receive = {
        case Work(n, c) if n &lt; 0 =&gt; throw new Exception(&quot;Negative number&quot;)
        case Work(n, c) =&gt; self reply n.isProbablePrime(c);
      }
    }

And this is how I start my workers:

    val workers = Vector.fill(nrOfWorkers)(actorOf[AkkaWorkerFT].start());
    val router = Routing.loadBalancerActor(SmallestMailboxFirstIterator(workers)).start()

And this is how I shut everything down:

    futures.foreach( _.await )
    router ! Broadcast(PoisonPill)
    router ! PoisonPill

Now what happens is if I send the workers messages with n &gt; 0 (no exception is thrown), everything works fine and the application shuts down properly. However, as soon as I send it a single message which results in an exception, the application does not terminate because there is still an actor running, but I can&#39;t figure out where it comes from.

In case it helps, this is the stack of the thread in question:

      Thread [akka:event-driven:dispatcher:event:handler-6] (Suspended)	
    	Unsafe.park(boolean, long) line: not available [native method]	
    	LockSupport.park(Object) line: 158	
    	AbstractQueuedSynchronizer$ConditionObject.await() line: 1987	
    	LinkedBlockingQueue&lt;E&gt;.take() line: 399	
    	ThreadPoolExecutor.getTask() line: 947	
    	ThreadPoolExecutor$Worker.run() line: 907	
    	MonitorableThread(Thread).run() line: 680	
    	MonitorableThread.run() line: 182	

PS: The thread which is not terminating isn&#39;t any of the worker threads, because I&#39;ve added a postStop callback, every one of them stops properly.

PPS: `Actors.registry.shutdownAll` workarounds the problem, but I think shutdownAll should only be used as a last resort, shouldn&#39;t it?

Akka Actor not terminating if an exception is thrown

I&#39;m using Devise in a Rails 3 app, but in this case, a user must be created by an existing user, who determines what permissions he/she will have.

Because of this, I want:

- To **remove the route for users to sign up**. 
- To **still allow users to edit their profiles** (change email address and password) **after** they have signed up

How can I do this?

Currently, I&#39;m effectively removing this route by placing the following before `devise_for :users`:

    match &#39;users/sign_up&#39; =&gt; redirect(&#39;/404.html&#39;)

That works, but I imagine there&#39;s a better way, right?

## Update


As Benoit Garret said, the best solution in my case is to skip creating the registrations routes en masse and just create the ones I actually want. 

To do that, I first ran `rake routes`, then used the output to re-create the ones I wanted. The end result was this:

    devise_for :users, :skip =&gt; [:registrations] 
    as :user do
      get &#39;users/edit&#39; =&gt; &#39;devise/registrations#edit&#39;, :as =&gt; &#39;edit_user_registration&#39;
      put &#39;users&#39; =&gt; &#39;devise/registrations#update&#39;, :as =&gt; &#39;user_registration&#39;
    end

Note that:

- I still have `:registerable` in my `User` model
- `devise/registrations` handles updating email and password
- Updating other user attributes - permissions, etc - is handled by a different controller

## Actual answer:

Remove the route for the default Devise paths; i.e.:

    devise_for :users, path_names: {
      sign_up: &#39;&#39;
    }


How do I remove the Devise route to sign up?

I&#39;m working with Symfony 2 on a site which having 2 languages,
and I want to change patterns of my routes depending on user locale language !

Example:

    user_login_en:
        pattern:  /en/user/login.html
        defaults: { _controller: SfErrorsAppBundle:User:login, _locale: en }
    
    user_login_fr:
        pattern:  /fr/utilisateur/connexion.html
        defaults: { _controller: SfErrorsAppBundle:User:login, _locale: fr}


Inside a template, this is not difficult, i just have to pass the $this-&gt;get(&#39;session&#39;)-&gt;getLocale() from the controller to the template...

To work, I have to call my routes:

    $router-&gt;generate(&#39;user_login_&#39;.$locale, array());

But  inside my layouts, I have of course a menu, and sidebars, which have links... So I want to get the locale variable to use it ! So my question is simple: how to get this variable inside a &quot;layout&quot; template ? Otherwise, have you got any idea to change the pattern depending on the language ?

The reasons are that I want beautiful routes for all users, whether they&#39;re english or french... And also for a SEO reason !

Content Type	Original Author	Original Content on Stackoverflow
Question	iGEL	View Question on Stackoverflow
Solution 1 - Ruby on-Rails	Zabba	View Answer on Stackoverflow
Solution 2 - Ruby on-Rails	Christopher Oezbek	View Answer on Stackoverflow
Solution 3 - Ruby on-Rails	huntsfromshadow	View Answer on Stackoverflow

Why do routes with a dot in a parameter fail to match?

Ruby on-Rails Problem Overview

Ruby on-Rails Solutions

Solution 1 - Ruby on-Rails

Solution 2 - Ruby on-Rails

Solution 3 - Ruby on-Rails

What are examples of TCP and UDP in real life?

How to hide a column (GridView) but still access its value?

Attributions