Hi,
I want a rails method to be called automatically whenever the contents of a textfield is changed, or every n seconds. How can I do this? The method is on the object's model definition. Also, how can I get the content of the textfield?
Thanks.
A:
This will require using some javascript. I use the jQuery library to help me along. I would search the net ('Google') "rails jquery" for some tutorials.
Or if you prefer another library check out http://stackoverflow.com/questions/951141/best-javascript-libraries-to-work-with-rails
Once you have your javsacript library in place you will need some sort of script to monitor the input. One way is to use a keyup event to listen for activity. This script will then post your data to the server via ajax.
The Who
2009-12-09 00:39:43
I already know how to check if a certain element changed. Thats pretty easy using railsobserve_field("content", :frequency => 1, :function => "alert('Element changed')")I just don't know how to call the object's method.
André
2009-12-09 00:48:47
Instead of using `observe_field("content", :frequency => 1, :function => "alert('Element changed')")` which will run some javascript use `observe_field("content", :frequency => 1, :url => "controller/method/path" :with => "'text=' + value" )`. This will pass the value to a method in your controller. You can then do your call to your model and return whatever to your view.
JosephL
2009-12-09 02:03:40
For monitoring the field ever n seconds you might want to checkout the settimeout js function .
NM
2009-12-09 05:34:38
A:
You may also use built-in rails helpers and write something like
<%= periodically_call_remote :url => {:controller=>'mailbox',
:action => 'get_newest_messages'},
:frequency => 15
%>
And then in the specified controller you may call needed method of a model.
Sergii Vozniuk
2010-02-23 09:18:47