How can I determine/use $(this) in js callback script
- by Rabbott
I am using Rails and jQuery, making an ajax call initiated by clicking a link. I setup my application.js file to look like the one proposed here and it works great. The problem I'm having is how can I use $(this) in my say.. update.js.erb file to represent the link I clicked? I don't want to have to assign an ID to every one, then recompile that id in the callback script..
EDIT
To give a simple example of something similar to what I'm trying to do (and much easier to explain): If a user clicks on a link, that deletes that element from a list, the controller would handle the callback, and the callback (which is in question here) would delete the element I clicked on, so in the callback delete.js.erb would just say $(this).fadeOut(); This is why I want to use $(this) so that I dont have to assign an ID to every element (which would be the end of the world, just more verbose markup)
application.js
jQuery.ajaxSetup({ 'beforeSend': function(xhr) {xhr.setRequestHeader("Accept", "text/javascript,application/javascript,text/html")} })
function _ajax_request(url, data, callback, type, method) {
if (jQuery.isFunction(data)) {
callback = data;
data = {};
}
return jQuery.ajax({
type: method,
url: url,
data: data,
success: callback,
dataType: type
});
}
jQuery.extend({
put: function(url, data, callback, type) {
return _ajax_request(url, data, callback, type, 'PUT');
},
delete_: function(url, data, callback, type) {
return _ajax_request(url, data, callback, type, 'DELETE');
}
});
jQuery.fn.submitWithAjax = function() {
this.unbind('submit', false);
this.submit(function() {
$.post(this.action, $(this).serialize(), null, "script");
return false;
})
return this;
};
// Send data via get if <acronym title="JavaScript">JS</acronym> enabled
jQuery.fn.getWithAjax = function() {
this.unbind('click', false);
this.click(function() {
$.get($(this).attr("href"), $(this).serialize(), null, "script");
return false;
})
return this;
};
// Send data via Post if <acronym title="JavaScript">JS</acronym> enabled
jQuery.fn.postWithAjax = function() {
this.unbind('click', false);
this.click(function() {
$.post($(this).attr("href"), $(this).serialize(), null, "script");
return false;
})
return this;
};
jQuery.fn.putWithAjax = function() {
this.unbind('click', false);
this.click(function() {
$.put($(this).attr("href"), $(this).serialize(), null, "script");
return false;
})
return this;
};
jQuery.fn.deleteWithAjax = function() {
this.removeAttr('onclick');
this.unbind('click', false);
this.click(function() {
$.delete_($(this).attr("href"), $(this).serialize(), null, "script");
return false;
})
return this;
};
// This will "ajaxify" the links
function ajaxLinks(){
$('.ajaxForm').submitWithAjax();
$('a.get').getWithAjax();
$('a.post').postWithAjax();
$('a.put').putWithAjax();
$('a.delete').deleteWithAjax();
}
show.html.erb
<%= link_to 'Link Title', article_path(a, :sentiment => Article::Sentiment['Neutral']), :class => 'put' %>
The combination of the two things will call update.js.erb in rails, the code in that file is used as the callback of the ajax ($.put in this case)
update.js.erb
// user feedback
$("#notice").html('<%= flash[:notice] %>');
// update the background color
$(this OR e.target).attr("color", "red");
