2.3.4 xml files cannot be opened by 2.2.x anymore (?) (Re: Db structure)
stimming at tuhh.de
Fri Aug 21 04:42:12 EDT 2009
This seems to be the unfortunate fall-out of what has been discussed
implemented in r18246. The change was: "Store account "hidden" and
"placeholder" flags as booleans in the account record and with new
<hidden> and <placeholder> tags in the XML file. "
As an unfortunate side-effect, the 2.2.x xml parser barfs on the newly
introduced xml tags and refuses to load an xml file saved with
gnucash-trunk r18246 or newer, which includes the just released
> Phil Longstaff <plongstaff at rogers.com> writes:
>> This leads to potential backwards compatibility problems in the xml
>> file format. However, as long as 2.4 can read 2.2 XML files, do we
>> need to keep backwards compatibility so that 2.2 can read 2.4 files?
> Historically we have made non-compatible changes to the data file. For
> example we did the SX incompatibilities in 2.something. Ideally
> we plan for these changes so that you can make x.y.<late> be able
> to read the files from x.y+2 -- but that doesn't always work out.
Unfortunately the problem is not only silent data loss (which you have
avoided by duplicating the information into the old slots as well) but
additionally the picky implementation of the XML parser in the 2.2.x
series, which gets very confused when encountering new tags.
The use case for loading a 2.3 or 2.4 file into 2.2 again is rather
common: Someone runs the new version for testing and in order to do
thorough testing he uses his live data, but then for whatever reason
doesn't like the current state of the new version and prefers to
continue his daily work in the previous version.
Does anyone see the same issues? How are we going to deal with this?
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