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This commit replaces calls to pycompat helpers that were intended for
python 2 <-> python 3 interoperability for python 3 builtins, as python
2 is no longer officially supported by Odoo.
This includes:
* calls to imap/izip/ifilter replaced by map/zip/filter
* uses of text_type replaced by str
* uses of unichr replaced by chr
* calls to implements_to_string, implements_iterator removed
* string_types and integer_types replaced by str, int respectively
* calls to to_native replaced by calls to to_text
This is done in preparation to the removal of these deprecated helpers
in the following commit.
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The adaptation to Python 3 was done with two mistakes: the iteration on the lru
cache does not return keys, and functions are not sortable.
closes odoo/odoo#28870
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Returning a recordset from a cached method will raise an
`psycopg2.OperationalError` once the cursor is closed.
Add documentation to `ormcache` method indicating such
See OCA/stock-logistics-barcode#93 and #8795 for example of issues
Closes #19113
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Now that we're closer to switching to P3 for good, these helpers have
outlived their usefulness, and mostly add noise.
All remaining dict.iter*() or dict.view*() must be converted to the
normal keys(), values() or items() calls.
Whenever the result is likely to be used for more than the scope of a
loop, or when the dict needs to be modified during iteration, the calls
must be wrapped in a ``list()``, to protect the new P3 semantics.
Those cases are very exceptional.
Also removed some dead code or improved the API to remove unnecessary
conversions.
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* remove references to basestring & unicode (use relevant pycompat
helpers)
* remove some str calls (either entirely or replaced by relevant
helper, either text or native)
* use better API to avoid unnecessary conversions
* remove some XML declarations in views
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In Python 3:
* various builtins and dict methods were changed to return
view/iterable objects rather than lists
* and the separate Python 2 view/iterable builtins and methods were
removed altogether
This is problematic when using these items as list (which the happens
repeatedly in Odoo), but more viciously when iterating *multiple times*
over them (which also happens, which I've messed up multiple times while
writing this, and which is a pain to debug even when you've just created
the issue).
Convert all code using these to semantics-matching cross-version
helper functions to get the LCD behaviour between P2 and P3, and
forbid the builtins via lint.
issue #8530
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Gevent processes have pseudo-thread objects
that do no always have a `dbname`attribute.
This could crash the process upon receiving
a USR1 signal.
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Problem: the update of custom models/fields is not fully transactional, and may
potentially lead to an inconsistent database. An other problem is creating two
custom fields by writing on a model: if the second one fails, the first one has
been committed without notice. Retrying the request will give an unexpected
error (duplicate field name).
Solution: never commit in the middle of a request. If the changes have an
impact on the registry, then mark it as invalid (with a new flag), and signal
registry invalidation after everything has been committed. If the request
fails, reset the registry. Both registry and cache invalidation are handled
the same way.
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Introspection attributes on function and methods were originally
prefixed with func_ or im_ e.g. im_class or func_name. For coherence with the
rest of the data model, Python 3 added dunder attributes (__func__,
__code__) and removed the old style, the dunder attributes were
backported to Python 2.6.
Use dunder attributes everywhere we're currently using func_* or im_*
attributes.
Fixers:
lib2to3.fixes.fix_funcattrs
lib2to3.fixes.fix_methodattrs
#8530
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