Hey everyone,
I'm writing a project that does some communication with proprietary devices
on a non-standard protocol, so I've written a custom exception class that
extends Exception and has some additional useful parameters. However, when I
raise an exception instantiated from my class, the pretty Django error page
doesn't report any of the parameters. It's probably a stupid mistake I've
made, but I can't figure it out.
Here's a snippet of my custom exception class (with additional, similar code
removed for the sake of clarity):
class ConnectionError(Exception):
CONNECTION_REFUSED = 1
INVALID_DATA = 2
def __init__(self, type, buffer_name, *args, **kwargs):
self.type = type
self.buffer_name = buffer_name
self.args = args
def __str__(self):
if self.type == ConnectionError.CONNECTION_REFUSED:
return 'Connection refused for %s' % self.buffer_name
elif self.type == ConnectionError.INVALID_DATA:
# The first arg in self.args is the string we got back from the
device
return 'Invalid data received for %s: "%s"' % (self.buffer_name,
self.args[0])
else:
return "Unknown connection error"
In a view, if I try
raise ConnectionError(ConnectionError.CONNECTION_REFUSED, "mainbuf")
then the pretty Django error page just says
ConnectionError at /page/
Request Method: GET
without any specifics. Ideally, I'd like to see the custom "Connection
refused for %s" string that I wrote.
At the same time, if I try
raise ConnectionError(ConnectionError.INVALID_DATA, "mainbuf",
"BADDATA")
then the Django error page says
ConnectionError at /page/
BADDATA
Request Method: GET
In the second case, Django catches the last argument, but not the first. But
in both cases, it doesn't read my custom string message.
Is there any way to display custom error strings, or am I doing something
completely wrong?
Thanks a ton!
Nick
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