To clear the whole thing use the reset_session method in a controller.

    reset_session

Here&#39;s the documentation on this method: http://api.rubyonrails.org/classes/ActionController/Base.html#M000668

&gt; Resets the session by clearing out all
&gt; the objects stored within and
&gt; initializing a new session object.


Good luck!

session in rails is a hash object. Hence any function available for clearing hash will work with sessions.

    session.clear

or 
if specific keys have to be destroyed:

    session.delete(key)


Tested in rails 3.2

**added**

People have mentioned by `session={}` is a bad idea.  Regarding `session.clear`, Lobati comments-  It looks like you&#39;re probably better off using reset_session [than session.clear], as it does some other cleaning up beyond what session.clear does. Internally,  [reset_session calls session.destroy][1], [which itself calls clear as well some other stuff.][2]


  [1]: https://github.com/rails/rails/blob/afc2b424e27fe48f83d5d1be73a8fadc38499c0c/actionpack/lib/action_dispatch/http/request.rb#L350
  [2]: https://github.com/rails/rails/blob/master/actionpack/lib/action_dispatch/request/session.rb#L79-L87

to delete a user&#39;s session 

    session.delete(:user_id)

To clear only certain parameters, you can use:

    [:param1, :param2, :param3].each { |k| session.delete(k) }

add this code to your ApplicationController
  

    def reset_session
      @_request.reset_session
    end

( Dont know why no one above just mention this code 
as it fixed my problem )
http://apidock.com/rails/ActionController/RackDelegation/reset_session

I&#39;m struggling getting my head around the Django&#39;s ORM. What I want to do is get a list of distinct values within a field on my table .... the equivalent of one of the following:

    SELECT DISTINCT myfieldname FROM mytable

(or alternatively)

    SELECT myfieldname FROM mytable GROUP BY myfieldname

I&#39;d at least like to do it the Django way before resorting to raw sql.
For example, with a table:

&gt;id, street, city
&gt;
&gt;1, Main Street, Hull
&gt;
&gt;2, Other Street, Hull
&gt;
&gt;3, Bibble Way, Leicester
&gt;
&gt;4, Another Way, Leicester
&gt;
&gt;5, High Street, Londidium

I&#39;d like to get: 
&gt;Hull, Leicester, Londidium.

Select distinct values from a table field

It can be anoying that jQuery event handlers always execute in the order they were bound. For example:

    $(&#39;span&#39;).click(doStuff1);
    $(&#39;span&#39;).click(doStuff2);

clicking on the span will cause `doStuff1()` to fire, followed by `doStuff2()`.

At the time I bind doStuff2(), I would like the option to bind it ***before*** doStuff1(), but there doesn&#39;t appear to be any easy way to do this.

I suppose most people would say, just write the code like this:

    $(&#39;span&#39;).click(function (){
        doStuff2();
        doStuff1();
    });

But this is just a simple example - in practise it is not always convienient to do that.

There are situations when you want to bind an event, and the object you are binding to already has events. And in this case you may simply want the new event to fire before any other existing events.

So what is the best way to achieve this in jQuery?

jQuery event handlers always execute in order they were bound - any way around this?

I can&#39;t seem to find it anywhere... How do I delete/destroy/reset/empty/clear a user&#39;s session in Rails? Not just one value but the whole thing..

How to empty/destroy a session in rails?

<p>I can't seem to find it anywhere... How do I delete/destroy/reset/empty/clear a user's session in Rails? Not just one value but the whole thing..</p>


I have a Rails 3 project.  With Rails 3 came Arel and the ability to reuse one scope to build another.  I am wondering if there is a way to use scopes when defining a relationship (e.g. a &quot;has_many&quot;).  

I have records which have permission columns.  I would like to build a default_scope that takes my permission columns into consideration so that records (even those accessed through a relationship) are filtered.

Presently, in Rails 3, default_scope (including patches I&#39;ve found) don&#39;t provide a workable means of passing a proc (which I need for late variable binding).  Is it possible to define a has_many into which a named scope can be passed?

The idea of reusing a named scope would look like:

    Orders.scope :my_orders, lambda{where(:user_id =&gt; User.current_user.id)}
    has_many :orders, :scope =&gt; Orders.my_orders

Or implicitly coding that named scope in the relationship would look like:

    has_many :orders, :scope =&gt; lambda{where(:user_id =&gt; User.current_user.id)}

I&#39;m simply trying to apply default_scope with late binding.  I would prefer to use an Arel approach (if there is one), but would use any workable option.  

Since I am referring to the current user, I cannot rely on conditions that aren&#39;t evaluated at the last possible moment, such as:

    has_many :orders, :conditions =&gt; [&quot;user_id = ?&quot;, User.current_user.id]


How do you scope ActiveRecord associations in Rails 3?

On a bash console, if I do this:

    cd mydir
    ls -l &gt; mydir.txt

The &gt; operator captures the standard input and redirects it to a file; so I get the listing of files in `mydir.txt` instead of in the standard output.

Is there any way to do something similar on the rails console?

I&#39;ve got a ruby statement that generates lots of prints (~8k lines) and I&#39;d like to be able to see it completely, but the console only &quot;remembers&quot; the last 1024 lines or so. So I thought about redirecting to a file - If anyone knows a better option, I&#39;m all ears.

rails - Redirecting console output to a file

What I want is to create a Model that connects with another using a has_many association in a dynamic way, without the foreign key like this:

    has_many :faixas_aliquotas, :class_name =&gt; &#39;Fiscal::FaixaAliquota&#39;,
                :conditions =&gt; [&quot;regra_fiscal = ?&quot;, ( lambda { return self.regra_fiscal } ) ]

But I get the error: 

    : SELECT * FROM &quot;fis_faixa_aliquota&quot; WHERE (&quot;fis_faixa_aliquota&quot;.situacao_fiscal_id = 1
    AND (regra_fiscal = E&#39;--- !ruby/object:Proc {}&#39;))

Is this possible?

Rails has_many with dynamic conditions

I have a RoR application (ruby v1.8.7; rails v2.3.5) that is caching a page in the development environment.  This wouldn&#39;t be so much of an issue, but the cached page&#39;s `a` elements are incorrect.

I haven&#39;t made any changes to the development.rb file and I haven&#39;t knowingly added any caching commands to the controllers.

I&#39;ve tried clearing the browser&#39;s (Firefox 3.5 on OSX) cookie and page caches for this site (localhost).  I&#39;ve also restarted Mongrel.  Nothing seems to help.

What am I missing?

Ruby on Rails: Clear a cached page

Why is there a need to define a new method in RESTful controller, follow it up with a create method?

Google search didn&#39;t provide me the answer I was looking for. I understand the difference, but need to know why they are used the way they are.

Rails new vs create

Anyone have any &quot;best practices&quot; tips for Rails and sessions? The default session type for Rails 3 is still CookieStore, right? I used SqlSessionStore for a while and it worked well, but I may move away from that in favor of CookieStore. 

Is it still not a good idea to use CookieStore for sensitive info, even with salted info or is that better stored in the DB?

Rails sessions current practices

After logging in via `$.ajax()` to a site, I am trying to send a second `$.ajax()` request to that site - but when I check the headers sent using FireBug, there is no session cookie being included in the request.

What am I doing wrong?

Why is jQuery&#39;s .ajax() method not sending my session cookie?

Why does the property **SessionID** on the **Session**-object in an ASP.NET-page change between requests?

I have a page like this:

    ...
    &lt;div&gt;
        SessionID: &lt;%= SessionID %&gt;
    &lt;/div&gt;
    ...

And the output keeps changing every time I hit F5, independent of browser.

ASP.NET: Session.SessionID changes between requests

I recently upgraded to PHP 5.3 and since then I get (sporadic) error messages which indicate Apache (or may be the cleaner of the session files) has no permissions to the folder where the sessions are stored.  
This happens randomly and can&#39;t be reproduced with exact steps, which led me to guess it is the session cleaner.  
Any one has any experience with such errors?

The error message (which is fired on the `session_start()` line) is:

&gt; ps_files_cleanup_dir:
&gt; opendir(/var/lib/php5) failed:
&gt; Permission denied.

ls -ltr on the session directory gives:

    drwx-wx-wt  2 root          root          4096 2010-05-25 12:39 php5

Inside this directory I do see session files owned by www-data which is my Apache, and the app does work fine. 
Which makes me wonder, under which user does the session GC runs?

Issues with PHP 5.3 and sessions folder

In one of controllers in my Grails application I&#39;m preserving a parameter value in a session variable like this:

    session.myVariable = params.myValue

After that, I can access the saved value from different controllers/GSP-pages as long as I actively use the app. However, if I don&#39;t use my app for a while, even though my browser window is still open, the session variable looses it&#39;s value.

Does this happens because the session expires? I was under impression that a session lives until the browser window is still open, but apparently I was wrong.

What should I do to ensure all session variables I define in my Grails app don&#39;t expire until the browser is closed? Is there any way to set session timeout manually?

Thank you in advance for your answers!


How to configure a session timeout for Grails application?

I am using ASP.NET page methods with jQuery.... How do I get the value of a session variable inside a static method in C#?

    protected void Page_Load(object sender, EventArgs e)
    {
        Session[&quot;UserName&quot;] = &quot;Pandiya&quot;;
    }

    [WebMethod]
    public static string GetName()
    {
        string s = Session[&quot;UserName&quot;].ToString();
        return s;
    }

When I compile this I get the error:

&gt;An object reference is required for the non-static field, method, or property &#39;System.Web.UI.Page.Session.get&#39;`

How can I get the value of a session variable inside a static method?

Suppose, I have a webserver which holds numerous servlets. For information passing among those servlets I am setting session and instance variables.

Now, if 2 or more users send request to this server then what happens to the session variables?   
Will they all be common for all the users or they will be different for each user?  
If they are different, then how was the server able to differentiate between different users?

One more similar question, if there are `n` users accessing a particular servlet, then this servlet gets instantiated only the first time the first user accessed it or does it get instantiated for all the users separately?   
In other words, what happens to the instance variables?

How do servlets work? Instantiation, sessions, shared variables and multithreading

As the title says, are there limits (if any) for session variables or they&#39;re considered as *usual* variables and can store equal amount of data?

I&#39;m looking if there are any other limits aside from variable type ones like max length, max values and so on.

P.S. If the question is unclear, please let me know.

Thanks in advance!

Are there limits for session variables?

    SHOW VARIABLES LIKE &quot;%wait%&quot;
    
    Result: 28800
    
    SET @@GLOBAL.wait_timeout=300
    
    SHOW GLOBAL VARIABLES LIKE &quot;%wait%&quot;
    
    Result: 300
    
    SHOW SESSION VARIABLES LIKE &quot;%wait%&quot;
    
    Result:28800

I am confused by the results. Why does the last query give Result:28800 ?


MySQL wait_timeout Variable - GLOBAL vs SESSION

I&#39;m trying to timeout an *HttpSession* in Java. My container is WebLogic.

Currently, we have our session timeout set in the *web.xml* file, like this
&lt;!-- language: lang-xml --&gt;

    &lt;session-config&gt;
        &lt;session-timeout&gt;15&lt;/session-timeout&gt;
    &lt;/session-config&gt;

Now, I&#39;m being told that this will terminate the session (or is it all sessions?) in the 15th minute of use, regardless their activity.

I&#39;m wondering if this approach is the correct one, or should I programatically set the time limit of inactivity by
&lt;!-- language: lang-java --&gt;

    session.setMaxInactiveInterval(15 * 60); //15 minutes

I don&#39;t want to drop all sessions at 15 minutes, only those that have been inactive for 15 minutes.

Are these methods equivalent? Should I favour the *web.xml* config?


SessionTimeout: web.xml vs session.maxInactiveInterval()

I am using Spring Security 3.0 to authenticate with an LDAP server and I cannot figure out to set my own session timeout period. I believe that the default is 30 minutes but I need to set it to longer than that

Setting session timeout period with Spring Security 3.0

I would like to extend the session timeout in php

I know that it is possible to do so by modifying the php.ini file.
But I don&#39;t have access to it.

So is it possible to do it only with php code?

How to change the session timeout in PHP?

What is the default session timeout for web applications deployed on Tomcat5.5? Is it browser specific? In my web application, default timeout is mentioned neither in `web.xml` nor in code.


Content Type	Original Author	Original Content on Stackoverflow
Question	tybro0103	View Question on Stackoverflow
Solution 1 - Ruby on-Rails	Gdeglin	View Answer on Stackoverflow
Solution 2 - Ruby on-Rails	Lavixu	View Answer on Stackoverflow
Solution 3 - Ruby on-Rails	vjnan369	View Answer on Stackoverflow
Solution 4 - Ruby on-Rails	vladCovaliov	View Answer on Stackoverflow
Solution 5 - Ruby on-Rails	David Mesaros	View Answer on Stackoverflow

How to empty/destroy a session in rails?

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

jQuery event handlers always execute in order they were bound - any way around this?

Select distinct values from a table field

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