I'm trying to download data from my datastore using the bulk loader. I can
generate the config yaml file just fine. But when I try to use it to
download my data, it explodes with the following error:
File
"/home/kbradley/google_appengine/google/appengine/ext/bulkload/csv_connector.py",
line 75, in writerow
row_encoded = dict([(k, self.encoder(v)[0]) for (k, v) in
row.iteritems()])
TypeError: coercing to Unicode: need string or buffer, NoneType found
I'm assuming the problem is that something in my datastore is null or
missing, but I'm not sure what specifically it doesn't like. Previously, I
had a similar error regarding some of the Blobs in my datastore. Wrapping
the export transform in transform.none_if_empty() for all of the blobs
appeared to have done the trick. At least, it stopped giving me errors
about a specific field, and is now giving me this general error.
The logs show that the bulk loader going through every last entry in my
datastore. So although there are plenty of fields that are null or missing,
it didn't seem to have a problem with it until the end.
Any thoughts on what the problem might be?
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