python - Dajaxice fonction de rappel appelée Double - Stack Overflow

I'm using django-dajaxice-ng package (django-dajaxice fork for Django 1.5 and above, since I use Django 1.5.4), and I have this strange issue.
Sometimes the callback function is called twice or even more.
Simple usage:

...
{% load dajaxice_templatetags %}
...
{% dajaxice_js_import %}

<script>

    function update_chat(data) {
        messages = eval(data.messages);
        howmany=messages.length;
        if (howmany>0)
            console.log('called');
        for (i=0;i<howmany;i++) {
            M=messages[i];
            console.log(M.msg,M.sent);
        };
    }

    setInterval(function() {
            Dajaxice.myapp.receiveChat(update_chat,{'userID': {{otheruser.id}} });
    },2000);

 </script>

and in myapp/ajax.py:

def receiveChat(request,userID):
    # find new messages from userID and mark them as READ.
    return json.dumps({'messages':serialized_messages})

Here's the console log:

called
"Message" "16:09:28"
called
"Message" "16:09:28" 

As you can see, sometimes (very often, actually) update_chat is triggered 2 or 3 times.
I'm 100% sure that:

• the ajax function receiveChat is called once


• the message shown twice is stored once.

I define serialized_messages = json.dumps(messages), being messages a list of dicts.
The result is like this:

'[{"msg": "Message", "sent": "16:09:28"}]'

In this case there's one only message, but works as well with more than one.

I had to do this double serialization (the other one's in return) because apparently dajaxice accept only dict as admitted return values.

Anyone who also got this behavior? Any clue?

EDIT I'm using neo4django which uses neo4j-rest-client, I have to do a .save() on a model, and notice ONLY with that save I got the problem, maybe because of another HTTP request?

EDIT 2 It's not a dajaxice issue, switching to ajax $.get() gives same results, but really I can't figure it out. Seems like not all browsers are doing it, sure Chrome does.

I'm using django-dajaxice-ng package (django-dajaxice fork for Django 1.5 and above, since I use Django 1.5.4), and I have this strange issue.
Sometimes the callback function is called twice or even more.
Simple usage:

...
{% load dajaxice_templatetags %}
...
{% dajaxice_js_import %}

<script>

    function update_chat(data) {
        messages = eval(data.messages);
        howmany=messages.length;
        if (howmany>0)
            console.log('called');
        for (i=0;i<howmany;i++) {
            M=messages[i];
            console.log(M.msg,M.sent);
        };
    }

    setInterval(function() {
            Dajaxice.myapp.receiveChat(update_chat,{'userID': {{otheruser.id}} });
    },2000);

 </script>

and in myapp/ajax.py:

def receiveChat(request,userID):
    # find new messages from userID and mark them as READ.
    return json.dumps({'messages':serialized_messages})

Here's the console log:

called
"Message" "16:09:28"
called
"Message" "16:09:28" 

As you can see, sometimes (very often, actually) update_chat is triggered 2 or 3 times.
I'm 100% sure that:

• the ajax function receiveChat is called once


• the message shown twice is stored once.

I define serialized_messages = json.dumps(messages), being messages a list of dicts.
The result is like this:

'[{"msg": "Message", "sent": "16:09:28"}]'

In this case there's one only message, but works as well with more than one.

I had to do this double serialization (the other one's in return) because apparently dajaxice accept only dict as admitted return values.

Anyone who also got this behavior? Any clue?

EDIT I'm using neo4django which uses neo4j-rest-client, I have to do a .save() on a model, and notice ONLY with that save I got the problem, maybe because of another HTTP request?

EDIT 2 It's not a dajaxice issue, switching to ajax $.get() gives same results, but really I can't figure it out. Seems like not all browsers are doing it, sure Chrome does.

Source