Google App Engine (Python SDK) - How to catch db exceptions -


i'm using google app engine python , encountering errors this:

raise badvalueerror('property %s not multi-line' % self.name) badvalueerror: property title not multi-line error    2014-09-20 16:01:23,969 wsgi.py:278]  traceback (most recent call last):

i've imported db module: from google.appengine.ext import db

and attempting silently (for now) catch error code this:

try:     r.put() except db.error:     pass

yet error continues break program execution. doing wrong? (or not doing?)

thanks...

here full traceback:

traceback (most recent call last):   file "/applications/googleappenginelauncher.app/contents/resources/googleappengine-default.bundle/contents/resources/google_appengine/lib/webapp2-2.3/webapp2.py", line 1511, in __call__     rv = self.handle_exception(request, response, e)   file "/applications/googleappenginelauncher.app/contents/resources/googleappengine-default.bundle/contents/resources/google_appengine/lib/webapp2-2.3/webapp2.py", line 1505, in __call__     rv = self.router.dispatch(request, response)   file "/applications/googleappenginelauncher.app/contents/resources/googleappengine-default.bundle/contents/resources/google_appengine/lib/webapp2-2.3/webapp2.py", line 1253, in default_dispatcher     return route.handler_adapter(request, response)   file "/applications/googleappenginelauncher.app/contents/resources/googleappengine-default.bundle/contents/resources/google_appengine/lib/webapp2-2.3/webapp2.py", line 1077, in __call__     return handler.dispatch()   file "/applications/googleappenginelauncher.app/contents/resources/googleappengine-default.bundle/contents/resources/google_appengine/lib/webapp2-2.3/webapp2.py", line 547, in dispatch     return self.handle_exception(e, self.app.debug)   file "/applications/googleappenginelauncher.app/contents/resources/googleappengine-default.bundle/contents/resources/google_appengine/lib/webapp2-2.3/webapp2.py", line 545, in dispatch     return method(*args, **kwargs)   file "/users/me/myapp/myapp.py", line 191, in     date_last_modified = date_last_modified)   file "/applications/googleappenginelauncher.app/contents/resources/googleappengine-default.bundle/contents/resources/google_appengine/google/appengine/ext/db/__init__.py", line 970, in __init__     prop.__set__(self, value)   file "/applications/googleappenginelauncher.app/contents/resources/googleappengine-default.bundle/contents/resources/google_appengine/google/appengine/ext/db/__init__.py", line 614, in __set__     value = self.validate(value)   file "/applications/googleappenginelauncher.app/contents/resources/googleappengine-default.bundle/contents/resources/google_appengine/google/appengine/ext/db/__init__.py", line 2847, in validate     raise badvalueerror('property %s not multi-line' % self.name) badvalueerror: property column_series not multi-line

the exception raised while setting attribute; can see last part of line should catch exception in code in traceback:

  file "/users/me/myapp/myapp.py", line 191, in     date_last_modified = date_last_modified)

you creating or updating instance there, , that's exception should caught, not when calling r.put().


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