Hi,
This seems to be new behaviour from somewhere after sugar-0.84.
(probably after 0.88 as well)
If you take an entry from the datastore, examine its file path, adjust
metadata and save, you lose your data.
Simple test case:
Take a datastore ID of any item in your journal that you don't mind losing.
Open Terminal activity, run "python" to launch python shell
In shell:
>>> from sugar.datastore import datastore
>>> import dbus
>>> import os
Now lookup the datastore item
>>> obj = datastore.get("fc3e2c72-0ea3-4ddf-977f-cb5299e4d972")
>>> obj
<sugar.datastore.datastore.DSObject object at 0x948c52c>
Retreive its file path, check its size:
>>> path = obj.file_path
>>> path
dbus.String(u'/home/olpc/.sugar/default/data/fc3e2c72-0ea3-4ddf-977f-cb5299e4d972_B1OFZW.png')
>>> os.path.getsize(path)
10474L
Change the metadata:
>>> obj.metadata['title'] = dbus.ByteArray("my new title")
Now save:
>>> datastore.write(obj)
Now observe truncated file:
>>> os.path.getsize(path)
0L
bye bye data :(
The net effect of this is that if you change the title of a photo in
record, you lose your photo.
Daniel
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