It&#39;s a confusing operand, but it limits versions to a subset of the possible versions. So `~&gt; 2.0.0` means &quot;&gt;= 2.0.0 and &lt; 2.1.0&quot; in version numbers.

1.2.3 seems to be the latest version of Formtasic, that&#39;s why you&#39;re getting this error message.


I tried searching a way to `insert` information in multiple tables in the same query, but found out it&#39;s impossible?
So I want to `insert` it by simply using multiple queries i.e;

    INSERT INTO users (username, password) VALUES(&#39;test&#39;, &#39;test&#39;)
    INSERT INTO profiles (userid, bio, homepage) VALUES(&#39;[id of the user here?]&#39;,&#39;Hello world!&#39;, &#39;http://www.stackoverflow.com&#39;)
But how can I give the auto-increment `id` from the `users` to the &quot;manual&quot; `userid` for the `profile` table?

MySQL Insert into multiple tables? (Database normalization?)

Is there really no XML attribute counterpart to `setAlpha(int)`?

If not, what alternatives are there?

Android and setting alpha for (image) view alpha

In the gem file for https://github.com/justinfrench/formtastic they have:

     gem &#39;formtastic&#39;, &#39;~&gt; 2.0.0&#39;

What does the ~&gt; mean.
It actually gives me the error &quot;Could not find gem &#39;formtastic (~&gt; 2.0.0, runtime)&#39; in any of the gem sources.&quot;

What does ~&gt; mean in a gem file

In the gem file for <a href="https://github.com/justinfrench/formtastic" target="_blank" rel="noopener noreferrer">https://github.com/justinfrench/formtastic</a> they have:
<pre><code class="hljs language-arduino"> gem 'formtastic', '~> 2.0.0'
</code></pre>
What does the <del>> mean.
It actually gives me the error "Could not find gem 'formtastic (</del>> 2.0.0, runtime)' in any of the gem sources."

I want to update users attributes without password in devise. The case is like, if password and password confirmation fields are not blank then I need devise error and if they are blank then other user attributes need to be updated. How could I do this with devise?

Thanks in advance! 

Devise update user without password

This is a simplified example of what I am trying to achieve, I&#39;m relatively new to Rails and am struggling to get my head around relationships between models.

I have two models, the `User` model and the `Category` model. A user can be associated with many categories. A particular category can appear in the category list for many users. If a particular category is deleted, this should be reflected in the category list for a user.

In this example:

My `Categories` table contains five categories:

&lt;pre&gt;
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
| ID | Name                       |
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
| 1  | Sports                     | 
| 2  | News                       |
| 3  | Entertainment              |
| 4  | Technology                 |
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
&lt;/pre&gt;

My `Users` table contains two users:

&lt;pre&gt;
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
| ID | Name                       |
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
| 1  | UserA                      | 
| 2  | UserB                      |
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
&lt;/pre&gt;

&gt; UserA may choose Sports and Technology as his categories
&gt;
&gt; UserB may choose News, Sports and Entertainment
&gt;
&gt; The sports category is deleted, both UserA and UserB category lists reflect the deletion

I&#39;ve toyed around with creating a `UserCategories` table which holds the ids of both a category and user. This kind of worked, I could look up the category names but I couldn&#39;t get a cascading delete to work and the whole solution just seemed wrong.

The examples of using the belongs_to and has_many functions that I have found seem to discuss mapping a one-to-one relationship. For example, comments on a blog post.

 - How do you represent this many-to-many relationship using the built-in Rails functionality? 
 - Is using a separate table between the two a viable solution when using Rails?

Creating a many to many relationship in Rails

    &lt;%= render :partial =&gt; &#39;partial/path&#39;, :locals =&gt; {:xyz =&gt; &#39;abc&#39;} %&gt;

vs


    &lt;%= render :partial =&gt; &#39;partial/path&#39;, :object =&gt; @some_object %&gt;


I think the first one make a local variable named `xyz` available in the partial and the second one makes a local variable named `object` available in the partial. So what is the difference? (Besides `locals` allows more than one variable)

render partial :object vs :locals

I&#39;m experiencing a very strange problem with Rails and ajax using jQuery (although I don&#39;t think it&#39;s specific to jQuery).

My Rails application uses the cookie session store, and I have a very simple login that sets the user id in the session. If the user_id isn&#39;t set in the session, it redirects to a login page. This works with no problems. JQuery GET requests work fine too. The problem is when I do a jQuery POST - the browser sends the session cookie ok (I confirmed this with Firebug and dumping request.cookies to the log) but the session is blank, i.e. session is {}.

I&#39;m doing this in my application.js:

    $(document).ajaxSend(function(e, xhr, options) {
      var token = $(&quot;meta[name=&#39;csrf-token&#39;]&quot;).attr(&#39;content&#39;);
      xhr.setRequestHeader(&#39;X-CSRF-Token&#39;, token);
    });

and here is my sample post:

    $.post(&#39;/test/1&#39;, { _method: &#39;delete&#39; }, null, &#39;json&#39;);

which should get to this controller method (_method: delete):

    def destroy
      respond_to do |format|
        format.json { render :json =&gt; { :destroyed =&gt; &#39;ok&#39; }.to_json }
      end
    end

Looking at the log and using Firebug I can confirm that the correct cookie value is sent in the request header when the ajax post occurs, but it seems that at some point Rails loses this value and therefore loses the session, so it redirects to the login page and never gets to the method.

I&#39;ve tried everything I can think of to debug this but I&#39;m coming around to the idea that this might be a bug in Rails. I&#39;m using Rails 3.0.4 and jQuery 1.5 if that helps. I find it very strange that regular (i.e. non-ajax) get and post requests work, and ajax get requests work with no problems, it&#39;s just the ajax posts that don&#39;t.

Any help in trying to fix this would be greatly appreciated!

Many thanks,  
Dave

Rails not reloading session on ajax post

In a Rails 3 application using Steak, Capybara and RSpec how do I test the page&#39;s title?

Content Type	Original Author	Original Content on Stackoverflow
Question	Logan Bailey	View Question on Stackoverflow
Solution 1 - Ruby on-Rails	Pan Thomakos	View Answer on Stackoverflow

What does ~> mean in a gem file

Ruby on-Rails Problem Overview

Ruby on-Rails Solutions

Solution 1 - Ruby on-Rails

Android and setting alpha for (image) view alpha

MySQL Insert into multiple tables? (Database normalization?)

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