Give me some quick start to Ajax

[Fahim Patel]

Hi all,

 Question

       Give me some quick start to Ajax but should be simple because i have only theoretically knowledge of Ajax.

Thanks 

Best Regards 

Fahim Babar Patel

[Tommaso Visconti]

Fahim Patel ha scritto:

> Hi all,
>
> Question
> Give me some quick start to Ajax but should be simple because i have
> only theoretically knowledge of Ajax.

http://guides.rubyonrails.org/ajax_on_rails.html

[Colin Law]

Am I going blind or is that not linked to from the index
http://guides.rubyonrails.org/index.html ?

Colin

[Tommaso Visconti]

Colin Law ha scritto:

mmmm, yeah :)
I found it with google

[Colin Law]

Does anyone here do docrails (are the guides maintained by docrails)?
It should be fixed.

Colin

[Tomiwa Ijaware]

I found this article on madebydna http://madebydna.com/all/code/2011/12/05/ajax-in-rails-3.html

It really focuses on the rails ujs adapter

[Fahim Patel]

Thanks lot to all of you to reply . 

I follow below link which work perfectly for me.

http://tekn0t.net/ajax-example-with-rails-3-and-jquery

The link which i have given up is have full code. Below i have shown only 
confusing code to me.

I firstly clear that i seen first time respond_to keyword and different type of formats .

I know code is working perfectly when i do manual testing, but technically i am zero.

Q1  I don' t understood why there is create.js.erb and destroy.js.erb  require?

Q2  What is this   format.js in controller ?Is this line call to create.js.erb ?

Q3 below  code confuse me  .

If record save than call goes to format.html which send us to index page than when call goes to format.js ?

Or it work line by line ?i am just guessing .

#################code#####################################################33   

respond_to do |format|

      if @post.save
        format.html { redirect_to(posts_url,
                    :notice => 'Post was successfully created.') }
        format.js
      else
        format.html { redirect_to(posts_url) }
      end
    end
  end

#######################code##################################################

########################PostsController######################

class PostsController < ApplicationController
  def index
    @posts = Post.all
    @post = Post.new

    respond_to do |format|
      format.html
    end
  end

  def create
    @post = Post.new(params[:post])

    respond_to do |format|
      if @post.save
        format.html { redirect_to(posts_url,
                    :notice => 'Post was successfully created.') }
        format.js
      else
        format.html { redirect_to(posts_url) }
      end
    end
  end

  def destroy
    @post = Post.find(params[:id])
    @post.destroy

    respond_to do |format|
      format.html { redirect_to(posts_url) }
      format.js
    end
  end
end
################################################################################
################create.js.erb###############################################
$('#posts').prepend('<%= escape_javascript(render(@post)) %>');
$('#posts > li:first').effect('highlight', {}, 3000);
$('#post_form > form')[0].reset();

#################################################################################

######################destroy.js.erb#################################
$('#<%= dom_id(@post) %>').css('background', 'red');
$('#<%= dom_id(@post) %>').hide("fade", {}, 1500);
##################################################################################
Waiting for reply.

Thanks 

Best Regards 
Fahim Babar Patel

[Colin Law]

On 8 November 2012 06:34, Fahim Patel <paf...@gmail.com> wrote:
>
> Thanks lot to all of you to reply .
>
> I follow below link which work perfectly for me.
> http://tekn0t.net/ajax-example-with-rails-3-and-jquery
>
> The link which i have given up is have full code. Below i have shown only
> confusing code to me.
>
> I firstly clear that i seen first time respond_to keyword and different type
> of formats .
>
> I know code is working perfectly when i do manual testing, but technically i
> am zero.
> Q1 I don' t understood why there is create.js.erb and destroy.js.erb
> require?
> Q2 What is this format.js in controller ?Is this line call to
> create.js.erb ?
> Q3 below code confuse me .
> If record save than call goes to format.html which send us to index page
> than when call goes to format.js ?
> Or it work line by line ?i am just guessing .

A good way to understand code that is unclear is to experiment with it
and see what the effect is. If you don't understand why files are
there at all then remove them (or empty them) and see what stops
working. If you don't understand what a method call does then study
the docs and google, and again experiment with changing it and see the
effect. That way you will learn much more than simply having the
answer given to you.

Have you worked right through a tutorial such as railstutorial.org? I
am sure I have already suggested that.

Colin

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