Rails - Mar 2013 - Access instance variable in ajax rendered by controller - Rails

I am making an ajax call to my controller. Controller is sending in the
response in an instance variable(as a json object). How can I access the
same in my ajax javascript?

This is my ajax call code:

$(document).ready(function(){
var currentCellText;
$(".inline").click(function() {
currentCellText = $(this).text();
$.ajax({
type: ''GET'',
dataType: "json",
url:''/test'',
async: false,
data:{ foo1:currentCellText
},
dataType: "json",
success:function(data){
alert(''<%= @response %>'');
},
error:function(data){
alert("Error");
}
});
});
});

This is my controller code.

def some_action
# after assigning a value to variable response
@response = Response.where(some condition)
respond_to do |format|
format.html #this will simply render the view
format.json { render :json => { :response => @response } }
end
end

I am getting an empty square bracket as my output. I am not able to find
out where I am wrong. Please guide me through.

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nikhil rn wrote in post #1101054:
> I am making an ajax call to my controller. Controller is sending in the
> response in an instance variable(as a json object). How can I access the
> same in my ajax javascript?
>
> $(document).ready(function(){
>   var currentCellText;
>   $(".inline").click(function() {
>     currentCellText = $(this).text();
>     $.ajax({
>       type: ''GET'',
>       dataType: "json",
>       url:''/test'',
>       async: false,
>       data:{ foo1:currentCellText
>       },
>       dataType: "json",
>       success:function(data){
>         alert(''<%= @response %>'');
>       },
>       error:function(data){
>         alert("Error");
>       }
>     });
>   });
> });
>
> I am getting an empty square bracket as my output. I am not able to find
> out where I am wrong. Please guide me through.
Have you confirmed for certain that your action method is returning the 
JSON you expect?

$ curl http://localhost:3000/test.json

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Hello Robert Walker.

After some operation in the controller, I am assigning a value to the
variable. When I print it in the controller using a "puts", I am
getting
the right output. But when I render it to the view, I am NOT getting the
required json alert in the javascript. Where am I going wrong? Can you 
please guide me?

Nikhil

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Am I trying to send it wrong from the controller? I mean, is my syntax 
wrong in sending the JSON from controller to the view? I have used such 
a JSON in other methods in the controller. I have no issues there. But I 
am not able to understand why I am not able to pass the same to the view 
using respond_to in controller.

Nikhil

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success:function(data){
alert(data);
}

2013/3/12 Сергей Соколов <sokolov.sergey.a@gmail.com>
> Can you show the code that sends the variable to the controller? And code
> that should render this variable.
>
>
> 2013/3/12 nikhil rn <lists-fsXkhYbjdPsEEoCn2XhGlw@public.gmane.org>
>
>> Am I trying to send it wrong from the controller? I mean, is my syntax
>> wrong in sending the JSON from controller to the view? I have used such
>> a JSON in other methods in the controller. I have no issues there. But
I
>> am not able to understand why I am not able to pass the same to the
view
>> using respond_to in controller.
>>
>> Nikhil
>>
>> --
>> Posted via http://www.ruby-forum.com/.
>>
>> --
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Groups
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>> email to
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>>
>>
>>
>
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Now I am able to pass the required json properly. How do I alert the 
same in javascript.

Nikhil

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If I print the json object value from the controller, I am getting the 
required output. But if I alert the same in the ajax, my output is as 
below:

[object Object]

Nikhil

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alert(object) calls object.toString() which returns [object Object] for any
object. If you want to dump the contents of the object, loop through it and
print each key-value pair.

-- 
Dheeraj Kumar


On Thursday 14 March 2013 at 10:22 AM, nikhil rn wrote:
> If I print the json object value from the controller, I am getting the 
> required output. But if I alert the same in the ajax, my output is as 
> below:
> 
> [object Object]
> 
> Nikhil
> 
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> Posted via http://www.ruby-forum.com/.
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> 
> 

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My json data printed at the controller is correct. But my data.length at 
the ajax javascript says "undefined". Even if i loop, it doesnt enter 
the loop as data.length is undefined.


success(data){
var x = new Array();
alert("created new array");
for (var i=0;i<data.length;i++)
{
x[i] ,x[data[i].toString()]=function(){};
}
}


Nikhil

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