SmokeyD wrote:
Hey people,sorry to bother you guys again. I have another question. Is there a way to detect the tg_format argument to a controller method? Now, if I have a controller method, with @expose("json") which returns a dict(form=DataGird(fields=fields),value=value) and then call that controller with ?tg_format=json I get an error from jsonify or something stating that the value is not jsonifiable (does that word exist?;). So instead I return dict(form=DataGird(field=fields).render(value=value). In the template I just use XML(form) to display the form if the controller is called without tg_format=json. I would rather detect in the controller though whether or not it is called with tg_format=json so I can decide in the controller if it should return the rendered or unrendered form. Do I make any sense? I hope somebody can help. Thanks in advance.
Here's two technique's for your problem:1) This should do it. I use something similar for returning errors in one of my projects:
ret_val = dict(value=value)
if request.params.get('tg_format', 'html') == 'json':
return ret_val
ret_val['form']=DataGrid(fields=fields)
2) With my custom widgets I've taken to including an __json__() method
that returns None. Since the data for the widget is being returned in a
separate variable this means we just have an extra "widget:None" in the
json return -- that's a lot less overhead than returning the html for
the DataGrid. You can use this same technique by subclassing DataGrid
and defining your own __json__() method:
class MyWidget(DataGrid):
def __json__(self):
return None
-Toshio
signature.asc
Description: OpenPGP digital signature
