controller not returning java script variable correctly

[jonas]

Hi

I have a controller that is supposed to return a list to a js function (for testing purposes):

def test():

    print "called2"

    data=[3, 6, 2, 7, 5, 2, 0, 3, 8, 9, 2, 5, 9, 3, 6, 3, 6, 2, 7, 5, 2, 1, 3, 8, 9, 2, 5, 9, 2, 7]
 
   return 'var data=%s;' % data 

I am calling this with an ajax function:

<script>
 ajax('{{=URL('test')}}',[],':eval');
 document.write(data);
 </script>

but is seems that the data is not present in the script.

what went wrong? 

[Anthony]

Javascript is asynchronous -- the document.write() line will be executed before the ajax call has completed. Try putting the document.write() in the returned Javascript itself.

[Jonas Fredriksson]

ok, now I undestand what you mean:

def test():

    print "called2"
    data3=[3, 6, 2, 7, 5, 2, 0, 3, 8, 9, 2, 5, 9, 3, 6, 3, 6, 2, 7, 5, 2, 1, 3, 8, 9, 2, 5, 9, 2, 7]

    return 'graph1(%s);' % data3   

<script>
 ajax('{{=URL('test')}}',[],':eval');

 </script>

graph1 is the actual function, the write function was just for testing. This works but it means that I have to make a python function for every js function call when passing values from python functions.

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[Anthony]

graph1 is the actual function, the write function was just for testing. This works but it means that I have to make a python function for every js function call when passing values from python functions.

You can do this:

def test():
    data = ...
    return '%s(%s);' % (request.args(0), data)
 
<script>
 ajax('{{=URL('default', 'test', args='myjsfunction')}}', [], ':eval');
</script>

Just pass the name of the JS function in the URL.

Anthony

[Jonas Fredriksson]

nice solution and it works.

thanks

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