    validates :network_id, :numericality =&gt; true, :allow_nil =&gt; true

        validates :network_id, :numericality =&gt; {:allow_blank =&gt; true}

You should use `allow_blank`

    validates :network_id,    :numericality =&gt; true, :allow_blank =&gt; true


  [1]: http://guides.rubyonrails.org/active_record_validations_callbacks.html#allow_blank

In Rails 4 (*Ruby 2*), you can write:

    validates :network_id, numericality: { greater_than_or_equal_to: 0, allow_nil: true }

You can also write like this...

    validates_numericality_of :network_id, allow_nil: true

I have imported the three20 project into my project, and when I upgraded to Xcode 4.2 with iOS 5, a bunch of warnings appeared in the project.  

I don&#39;t care about them, but they make a lot of noise, and it&#39;s easy to miss any real warnings in my project now.  Is there a way to disable warnings for those specific libraries?

Disable warnings in Xcode from frameworks

I need to show splash screen on my application start for few seconds. Does anybody know how to implement this?

Will be much appreciate for the help.

How to build splash screen in windows forms application?

I&#39;m trying to save a record which doesn&#39;t have one field set -- which has a validate numericality in the models. Even though the presence is not required in the validation, it&#39;s still throwing an error that the field is not a number.

**Validation:**

    validates :network_id,    :numericality =&gt; true

**Code to that is saving model:**

    networks.each do |network|
      network.url = network.raw_data.link
      network.save!
    end

**Error:**

    Validation failed: Network is not a number

Rails validation required numericality even though presence is not set to true

I'm trying to save a record which doesn't have one field set -- which has a validate numericality in the models. Even though the presence is not required in the validation, it's still throwing an error that the field is not a number.
Validation:
<pre><code class="hljs language-ini">validates :network_id, :numericality => true
</code></pre>
Code to that is saving model:
<pre><code class="hljs language-vbnet">networks.each do |network|
 network.url = network.raw_data.link
 network.save!
end
</code></pre>
Error:
<pre><code class="hljs language-csharp">Validation failed: Network is not a number
</code></pre>

Can some one please describe the usage of the following characters which is used in ERB file:

    &lt;%   %&gt;
    &lt;%=  %&gt;
    &lt;%  -%&gt;
    &lt;%#  %&gt;

what&#39;s the usage of each one ? 

What is the difference between &lt;%, &lt;%=, &lt;%# and -%&gt; in ERB in Rails?

I prefer *not* to concatenate JavaScript files in development mode, but serve them as individual files. So I configured:

development.rb:

    config.assets.compress = false
    config.assets.debug = true
    config.assets.compile = true

In my /app/assets/javascript directory I have:

- reviews.js
- reviews/
  - foo.js
  - bar.js

reviews.js:

    //= require jquery
    //= require jquery_ujs
    //= require_tree ./reviews


I include the JavaScript using `&lt;%= javascript_include_tag &quot;reviews&quot; %&gt;` in my layout. The generated page correctly references the three scripts individually and `reviews.js` is essentially empty. So far so good.

Now when I precompile my assets for production using `rake assets:precompile` the three JavaScript files are concatenated into `reviews.js`. This is all fine for production but now, *in development mode*, the concatenated `reviews.js` is served **in addition** to the two individual files.

Of course, this leads to all kinds of nasty bugs when developing because now, the content of `foo.js` and `bar.js` is served twice, one of them in a potentially older version in `reviews.js`.

How can I make sure Rails doesn&#39;t use the precompiled assets in development mode?

How to avoid precompiled assets being served in development mode?

I&#39;m using Pry with my Rails application. I set `binding.pry` inside a loop in my model to try and debug a problem. For example:

    (1..100).each do |i|
      binding.pry
      puts i
    end

When I type `quit`, it goes to the next iteration and stops again. Is there a way to step out of the loop so I don&#39;t have to type `quit` 100 times?

Currently the only way I know how to get out of it is to use &lt;kbd&gt;CTRL&lt;/kbd&gt;+&lt;kbd&gt;C&lt;/kbd&gt; and restart the application.


How do I step out of a loop with Ruby Pry?

Is there a better way to write this:

    if myarray.include? &#39;val1&#39; ||
       myarray.include? &#39;val2&#39; ||
       myarray.include? &#39;val3&#39; ||
       myarray.include? &#39;val4&#39;



Check for multiple items in array using .include? -- Ruby Beginner

How to write `if` and `if`-`else` statements in Haml for a Ruby on Rails application?

How to write if-condition in Haml?

When using node package manager you can specify `npm install --save mynodemodule` which automatically pops the module in `package.json`

I was wondering if there is a command for bundler that allows you to add the gem and version to the gemfile from the command line?

For example `bundle install --save nokogiri`

Add gem to gemfile with bundler from command line

I&#39;ve been using this for some time to return either `true` or `false` when building fake seed data. Just wondering if anybody has a better, more succinct or verbose way of returning either `true` or `false`. 

    rand(2) == 1 ? true : false

Best way of returning a random boolean value

I&#39;ve been updating my emacs config with the use of Rsense to allow for an autocomplete drop down box to appear whilst typing code.  This works well in most files except I&#39;ve found it doesn&#39;t allow me to select an answer from the table when I&#39;m editing some code in my ruby on rails project.

Here is my setup:
https://github.com/map7/simple_emacs

I&#39;m using this under Ubuntu 10.04.

For simple ruby script files it works great. I can open up a new file and type.

&lt;!-- language: lang-rb --&gt;

    &quot;test&quot;.up...

Just as I type the &#39;p&#39; character in up a list of options appear and I can go up and down the list with arrow keys and select one (eg: upcase) with the enter key.

What doesn&#39;t work is when I do the exact same test but within a rails project&#39;s base directory.

**Update:**

Found that the problem is with (require &#39;rails), so it&#39;s something in the emacs-rails plugin that the autocomplete doesn&#39;t like.

**Update:** 

It&#39;s within emacs-rails -&gt; rails-project.el. If I comment this macro out then autocomplete works, otherwise it doesn&#39;t:

&lt;!-- language: lang-rb --&gt;

    (defmacro* rails-project:with-root ((root) &amp;body body)
      &quot;If you use `rails-project:root&#39; or functions related on it
    several times in a block of code, you can optimize your code by
    using this macro. Also, blocks of code will be executed only if
    rails-root exist.
     (rails-project:with-root (root)
        (foo root)
        (bar (rails-core:file \&quot;some/path\&quot;)))
     &quot;
     `(let ((,root (rails-project:root)))
        (when ,root
          (flet ((rails-project:root () ,root))
            ,@body))))


Can someone explain why this breaks autocomplete?

Emacs Ruby autocomplete almost working

Here is my code:

    &lt;div class=&#39;some&#39; style=&#39;position: absolute; left: 300; top: 300;&#39;&gt;..&lt;/div&gt;

It parses only `style=&#39;position: absolute&#39;`, and doesn&#39;t parse the other styles. How can I achieve this? 

Haml: How to set inline style for element in HAML

I have a Rails controller in which I am setting a instance variable -

    @user_name = &quot;Some Username&quot;

In my .slim template I am using coffee engine to generate javascript and want to print out the user name from client-sie javascript code -


    coffee:
      $(document).ready -&gt;
        name = &quot;#{@user_name}&quot;
        alert name


But this is the javascript that is being generated??

    $(document).ready(function() {
        var name;
        name = &quot;&quot; + this.my_name;
        alert(name);
    }

**How do I access controller instance variables in my CoffeeScript code??**

I am tagging this as haml since I am guessing haml will have the same issue when using CoffeeScript .



How to access instance variables in CoffeeScript engine inside a Slim template

I have a Rails application and I&#39;m using jQuery to query my search view in the background. There are fields `q` (search term), `start_date`, `end_date` and `internal`. The `internal` field is a checkbox and I&#39;m using the `is(:checked)` method to build the url that is queried:

    $.getScript(document.URL + &quot;?q=&quot; + $(&quot;#search_q&quot;).val() + &quot;&amp;start_date=&quot; + $(&quot;#search_start_date&quot;).val() + &quot;&amp;end_date=&quot; + $(&quot;#search_end_date&quot;).val() + &quot;&amp;internal=&quot; + $(&quot;#search_internal&quot;).is(&#39;:checked&#39;));

Now my problem is in `params[:internal]` because there is a string either containing &quot;true&quot; or &quot;false&quot; and I need to cast it to boolean. Of course I can do it like this:

    def to_boolean(str)
         return true if str==&quot;true&quot;
         return false if str==&quot;false&quot;
         return nil
    end

But I think there must be a more Ruby&#39;ish way to deal with this problem! Isn&#39;t there...?

String &quot;true&quot; and &quot;false&quot; to boolean

I&#39;m new to Capybara and testing on Rails in general, so please forgive me if this is a simple answer.

I&#39;ve got this test

    it &quot;should be able to edit an assignment&quot; do
        visit dashboard_path
        select(@project.client + &quot; - &quot; + @project.name, :from =&gt; &quot;assignment_project_id&quot;)
        select(@team_member.first_name + &quot; &quot; + @team_member.last_name, :from =&gt; &quot;assignment_person_id&quot;)
        click_button &quot;Create assignment&quot;
        page.should have_content(@team_member.first_name)
    end

it passes as is, but if I add :js =&gt; true it fails with

    cannot select option, no option with text &#39;Test client - Test project&#39; in select box &#39;assignment_project_id&#39;

I&#39;m using FactoryGirl to create the data, and as the test passes without JS, I know that part is working. 

I&#39;ve tried with the default JS driver, and with the :webkit driver (with capybara-webkit installed)

I guess I don&#39;t understand enough what turning on JS for Capybara is doing.

Why would the test fail with JS on?

Content Type	Original Author	Original Content on Stackoverflow
Question	Hopstream	View Question on Stackoverflow
Solution 1 - Ruby on-Rails	Unixmonkey	View Answer on Stackoverflow
Solution 2 - Ruby on-Rails	p.matsinopoulos	View Answer on Stackoverflow
Solution 3 - Ruby on-Rails	apneadiving	View Answer on Stackoverflow
Solution 4 - Ruby on-Rails	sergserg	View Answer on Stackoverflow
Solution 5 - Ruby on-Rails	thedanotto	View Answer on Stackoverflow

Rails validation required numericality even though presence is not set to true

Ruby on-Rails Problem Overview

Ruby on-Rails Solutions

Solution 1 - Ruby on-Rails

Solution 2 - Ruby on-Rails

Solution 3 - Ruby on-Rails

Solution 4 - Ruby on-Rails

Solution 5 - Ruby on-Rails

How to build splash screen in windows forms application?

Disable warnings in Xcode from frameworks

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