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view roundup/__init__.py @ 5525:bb7865241f8a
Make CSV import/export compatible across Python versions (also RDBMS journals) (issue 2550976, issue 2550975).
The roundup-admin export and import commands are used for migrating
between different database backends. It is desirable that they should
be usable also for migrations between Python 2 and Python 3, and in
some cases (e.g. with the anydbm backend) this may be required.
To be usable for such migrations, the format of the generated CSV
files needs to be stable, meaning the same as currently used with
Python 2. The export process uses repr() to produce the fields in the
CSV files and eval() to convert them back to Python data structures.
repr() of strings with non-ASCII characters produces different results
for Python 2 and Python 3.
This patch adds repr_export and eval_import functions to
roundup/anypy/strings.py which provide the required operations that
are just repr() and eval() in Python 2, but are more complicated in
Python 3 to use data representations compatible with Python 2. These
functions are then used in the required places for export and import.
repr() and eval() are also used in storing the dict of changed values
in the journal for the RDBMS backends. It is similarly desirable that
the database be compatible between Python 2 and Python 3, so that
export and import do not need to be used for a migration between
Python versions for non-anydbm back ends. Thus, this patch changes
rdbms_common.py in the places involved in storing journals in the
database, not just in those involved in import/export.
Given this patch, import/export with non-ASCII characters appear based
on some limited testing to work across Python versions, and an
instance using the sqlite backend appears to be compatible between
Python versions without needing import/export, *if* the sessions/otks
databases (which use anydbm) are deleted when changing Python version.
| author | Joseph Myers <jsm@polyomino.org.uk> |
|---|---|
| date | Sun, 02 Sep 2018 23:48:04 +0000 |
| parents | 70f6a3ede190 |
| children | b68d3d8531d5 573b688fffeb |
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# # Copyright (c) 2001 Bizar Software Pty Ltd (http://www.bizarsoftware.com.au/) # This module is free software, and you may redistribute it and/or modify # under the same terms as Python, so long as this copyright message and # disclaimer are retained in their original form. # # IN NO EVENT SHALL BIZAR SOFTWARE PTY LTD BE LIABLE TO ANY PARTY FOR # DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING # OUT OF THE USE OF THIS CODE, EVEN IF THE AUTHOR HAS BEEN ADVISED OF THE # POSSIBILITY OF SUCH DAMAGE. # # BIZAR SOFTWARE PTY LTD SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, # BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS # FOR A PARTICULAR PURPOSE. THE CODE PROVIDED HEREUNDER IS ON AN "AS IS" # BASIS, AND THERE IS NO OBLIGATION WHATSOEVER TO PROVIDE MAINTENANCE, # SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS. # '''Roundup - issue tracking for knowledge workers. This is a simple-to-use and -install issue-tracking system with command-line, web and e-mail interfaces. Roundup manages a number of issues (with properties such as "description", "priority", and so on) and provides the ability to (a) submit new issues, (b) find and edit existing issues, and (c) discuss issues with other participants. The system will facilitate communication among the participants by managing discussions and notifying interested parties when issues are edited. Roundup's structure is that of a cake:: _________________________________________________________________________ | E-mail Client | Web Browser | Detector Scripts | Shell | |------------------+-----------------+----------------------+-------------| | E-mail User | Web User | Detector | Command | |-------------------------------------------------------------------------| | Roundup Database Layer | |-------------------------------------------------------------------------| | Hyperdatabase Layer | |-------------------------------------------------------------------------| | Storage Layer | ------------------------------------------------------------------------- 1. The first layer represents the users (chocolate). 2. The second layer is the Roundup interface to the users (vanilla). 3. The third and fourth layers are the internal Roundup database storage mechanisms (strawberry). 4. The final, lowest layer is the underlying database storage (rum). These are implemented in the code in the following manner:: E-mail User: roundup-mailgw and roundup.mailgw Web User: cgi-bin/roundup.cgi or roundup-server over roundup.cgi.client and roundup.cgi.template Detector: roundup.roundupdb and templates/<template>/detectors Command: roundup-admin Roundup DB: roundup.roundupdb Hyper DB: roundup.hyperdb, roundup.date Storage: roundup.backends.* Additionally, there is a directory of unit tests in "test". For more information, see the original overview and specification documents written by Ka-Ping Yee in the "doc" directory. If nothing else, it has a much prettier cake :) ''' __docformat__ = 'restructuredtext' __version__ = '1.6.0' # vim: set filetype=python ts=4 sw=4 et si