Hey guys, I am trying to build an web app. I am running Rails 3. I just
want to make a call to a controller method from my javascript(view
part). Most of the links says AJAX. But I dont know whether its my
search part on the internet causing me problems, but I just could not
find a simple way of calling a Controller Method from Javascript.
My javascript function:
home.html.erb
function test_call(val)
{
alert(val);
new Ajax.Request('/SessionsController/test_call_cont', {
method: 'post',
parameters: {
menu_id: val,
}
});
}
And in my sessioncontroller.rb
def test_call_cont
puts "Printing from Controller"
end
Where am I going wrong, should I have to include any js files, or is my
syntax wrong? Totally confused.
Hey guys, I am trying to build an web app. I am running Rails 3. I just
want to make a call to a controller method from my javascript(view
part). Most of the links says AJAX. But I dont know whether its my
search part on the internet causing me problems, but I just could not
find a simple way of calling a Controller Method from Javascript.
My javascript function:
home.html.erb
function test_call(val)
{
alert(val);
new Ajax.Request('/SessionsController/test_call_cont', {
Ajax.Request takes a url. Is '/SessionsController/test_call_cont' a
valid url? Perhaps '/sessions/test_call_cont' is what you want. Not
thought that you are not 'calling a controller method' but are
initiating a request on that url.
Hi Colin,
Im sorry but in the url, I am supposed to put up the path of my
controller method right?
Yes, my controller method is under main-application/app/views/sessions/.
So should I put it up like sessions/test_call_cont in the request? I
will also have to pass few parameters later on to that controller method
and render new page based on some operations in that controller
method(test_call_cont).
Hi Colin,
Im sorry but in the url, I am supposed to put up the path of my
controller method right?
Yes, my controller method is under main-application/app/views/sessions/.
You said earlier that the code is in sessions_controller.rb (actually
you said sessioncontroller.rb, but I assumed you meant
sessions_controller.rb) which should be in app/controllers, not
app/views.
So should I put it up like sessions/test_call_cont in the request?
Yes, you will also have to set up the route in routes.rb of course.
I
will also have to pass few parameters later on to that controller method
and render new page based on some operations in that controller
method(test_call_cont).
That is ok that is what controllers are for, but you should think of
it as an action, not a method (though it is a method of the controller
of course).
Colin,
Sorry again. It was a typing mistake I believe. My controller is
rightly placed in app/controllers. Though I have given the url as
/sessions/test_call_cont, Nothing seems to be happening. I am not
getting any error but neither I am getting the required output. Where
can I have gone wrong?
And I have also routed the method in the routes.rb. I have invoke that
url in routes.rb. But how can I achieve that from a javascript function
is my concern. Awaiting your thoughts on this.
Colin,
Sorry again. It was a typing mistake I believe. My controller is
rightly placed in app/controllers. Though I have given the url as
/sessions/test_call_cont, Nothing seems to be happening. I am not
getting any error but neither I am getting the required output. Where
can I have gone wrong?
Do you see anything in log/development.log when you make the call?
And I have also routed the method in the routes.rb. I have invoke that
url in routes.rb. But how can I achieve that from a javascript function
is my concern. Awaiting your thoughts on this.
Nikhil
What happens when you type that URL into a browser and try to visit it? You should see something, unless your controller does not include any handlers for a regular http request.
Do you see an error if you run with a js debugger such as firebug in
firefox? That is assuming you have checked that you are including
prototype.js as suggested by Jim.
What happens when you type that URL into a browser and try to visit it?
You should see something, unless your controller does not include any
handlers for a regular http request.
Walter
Walter,
When I hit the url, I found out I get this error:
Missing template sessions/test_call_cont, application/test_call_cont
with {:locale=>[:en], :formats=>[:html], :handlers=>[:erb, :builder,
:coffee]}
Yes I have put the latest prototype.js file in the
app/assets/javascripts folder.
ok. Are you using the asset pipeline? Also, what browser are you using?
I suggest you use chrome because it has a default developer tool. Look
at the js errors when you load the page. If there is nothing on the
log file and there's no response on the page, it most likely is an error
with javascript.
ok. Are you using the asset pipeline? Also, what browser are you
using?
I suggest you use chrome because it has a default developer tool. Look
at the js errors when you load the page. If there is nothing on the
log file and there's no response on the page, it most likely is an error
with javascript.
Jim,
I am using firefox 11. I am afraid I cant change my browser. And sorry,
how do I look for the js errors? I got nothing in the log file.
Hey Guys, let me explain you all my scenario where I am stuck.
I got a table filled with cells. When I right click on any cell, I got
to display a context menu and then call a controller method on left
clicking the context menu. I got to send in a parameter to my controller
code and return what controller sends back. I am using jquery right
click for my context menu. I have the clicked cell value. I just need to
call a ruby controller method.
This is my home.html.erb code:
$(document).ready(function() {
var currentCellText;/*this variable will have the clicked cell value*/
$("tbody td").mousedown(function(e) {
currentCellText = $(this).text();
