On Dec 4, 2009, at 1:34 PM, Philippe Clérié wrote:
> Are you using a library or did you code it yourself? What would be a good
> library to start with?
>
> --
>
>
> Philippe
>
I use jQuery, and that makes it simple.
First, have a view that returns JSON. Basically, this is all you need in your
view:
#where return_data is a dictionary
return HttpResponse(simplejson.dumps(return_data), mimetype="application/json")
Then, you'd have JavaScript like this:
#a GET version:
//Note: The variable name 'data,' supplied in the anonymous
//function definition below will receive the JSON sent by
//the view. If you have a key in your returned dictionary
//named 'balance,' you can refer to it with data.balance.
$.get("/balance_json/{{ch.slug}}/", {}, function (data){
$('#current_balance').html("$" + data.balance);
}, 'json');
#a POST version
//Same as above -- the returned dictionary (serialized to JSON)
//contains a key 'success' or 'fail.' In this case, the variable is
//named resp instead of data. Blame my predecessor for the
inconsistency.
$.post("/patient/{{ch.slug}}/appointment/", data, function(resp){
if(resp.success) {
$("#messages").html("<div id='success-message'
class='success'>" + resp.success + "</div>");
} else if (resp.fail) {
$("#messages").html("<div id='fail-message' class='fail'>" +
resp.fail + "</div>");
}
}, "json");
Also, if you've never used jQuery before, you should have a JavaScript section
like this:
$(document).ready(function(){
//put your code here -- this is the far superior replacement
//for putting stuff in an 'onLoad' section.
}
One more thing. Since you want to do do this repeatedly, you should use a
setTimeout() call at the end of your function so it happens again and again.
You may put it within an 'if' check to see whether the JSON returned a value
indicating that the process is complete.
Like this: setTimeout('your_function_name_here()', 5000) //this is a
five-second delay
Shawn
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