Ajax on Rails 26-Jul-16
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Ajax on Rails
26-Jul-16
Ajax in .rhtml
In the <head> section of your .rhtml page, do:
<%= javascript_include_tag "prototype" %>
The above code adds several files to your .rhtml page
Included is JavascriptHelper, which lets you write Ruby
code in place of Javascript code
Here’s a simple .rhtml page:
<%= link_to_remote("Do the Ajax thing",
:update => 'mydiv',
:url => { :action => :say_hello }) %>
<div id="mydiv">This text will be changed</div>
Ajax on the server side
The code on the preceding slide will call a method
named say_hello when the link is clicked, so here it is:
def say_hello
render(:layout => false)
end
We also need a corresponding say_hello.rhtml file:
<em>Hello from Ajax!</em> (Session id is
<%= session.session_id %>)
Results
Before clicking the link:
Do the Ajax thing
This text will be changed
After clicking the link:
Do the Ajax thing
Hello from Ajax! (Session ID is d633a8cd4416dfc7253)
The End
Example from: Agile Web Development with Rails
by Dave Thomas and David Heinemeier Hansson
![Ajaxxxx[1]](http://s2.studylib.net/store/data/027187282_1-caf33630d803ea166eb74b0da321b0c4-300x300.png)
