Hi Jens, I'm not sure I understand what you are trying to achieve but I assume you want to write a third-party field that supports both Django 1.7 and 1.8 without raising deprecating warnings?
I suggest you use the following pattern which also accounts for py2/3: import django from django.db import models from django.utils.six import with_metaclass MyFieldBase = type if django.VERSION >= (1, 8) else models.SubfieldBase class MyField(with_metaclass(MyFieldBase, models.Field)): def from_db_value(self, value, expression, connection, context): pass def to_python(self, value): pass This is stepping into the django-user@ territory so I suggest we move the discussion over there if the provided example doesn't match your needs but you are really just trying to write a portable third-party field. Simon Le mercredi 17 juin 2015 06:25:09 UTC-4, Jens Diemer a écrit : > > Am 16.06.2015 um 18:43 schrieb Tim Graham: > > The doc about how to ignore warnings in tests is here: > > > https://docs.djangoproject.com/en/dev/internals/contributing/writing-code/submitting-patches/#deprecating-a-feature > > > > > Alternatively, you can temporarily remove these lines in runtests.py: > > > > warnings.simplefilter("error", RemovedInDjango20Warning) > > warnings.simplefilter("error", RemovedInDjango21Warning) > > Thanks! > > But then, there can't exists tests that will raise a warning while > importing ?!? > > > > > So i try to make it clear: > > With v1.7 the "__metaclass__ = models.SubfieldBase" is needed. So i remove > the > tests without it. > > And i found a existing Bug https://code.djangoproject.com/ticket/9619 > for: > > to_python not called when fetching data with .values(...) > > > I update the tests and create a ticket and pull request here: > * https://code.djangoproject.com/ticket/24993 > * https://github.com/django/django/pull/4874 > > I can also made pull request for v1.8.x and master... > > > > > > I also found the Solution for: "to_python() didn't call with Python 3": > The "__metaclass__" syntax changed in Python 3. > > The Problem: I didn't read the doc carefully here: > > > https://docs.djangoproject.com/en/1.7/howto/custom-model-fields/#the-subfieldbase-metaclass > > > There are three code examples: > * for Python 2 only > * for Python 3 only > * for Python 2+3 using six.with_metaclass() > > What's about to remove the first two examples and leave only the > six.with_metaclass() example?!? > > I made also a ticket/pull request for this: > * https://code.djangoproject.com/ticket/24992 > * https://github.com/django/django/pull/4873 > > > > > > > > > > > > > > > On Tuesday, June 16, 2015 at 12:30:05 PM UTC-4, Jens Diemer wrote: > > > > > > I try to create a custom model field, that should "Converting values > to Python > > objects" as described in the documentation here: > > > > < > https://docs.djangoproject.com/en/dev/howto/custom-model-fields/#converting-values-to-python-objects > > > < > https://docs.djangoproject.com/en/dev/howto/custom-model-fields/#converting-values-to-python-objects>> > > > > > > > > It doesn't work with Python 2.7 and 3.4 with Django 1.7.x and > 1.8.x... > > > > > > I search around and found no unittest case for this > "howto/custom-model-fields" > > > > So i created a simple test case to investigate why my code not > worked. > > > > > > I made a unittest against "stable/1.7.x", "stable/1.8.x" and > "master" here: > > > > https://github.com/jedie/django/branches/yours > > <https://github.com/jedie/django/branches/yours> > > > > compare links: > > > > stable/1.7.x > > < > https://github.com/jedie/django/compare/stable/1.7.x...test_custom_model_fields_1.7.x > > > < > https://github.com/jedie/django/compare/stable/1.7.x...test_custom_model_fields_1.7.x>> > > > > > > > > stable/1.8.x > > < > https://github.com/jedie/django/compare/stable/1.8.x...test_custom_model_fields_1.8.x > > > < > https://github.com/jedie/django/compare/stable/1.8.x...test_custom_model_fields_1.8.x>> > > > > > > > > master > > < > https://github.com/jedie/django/compare/master...test_custom_model_fields_master > > > < > https://github.com/jedie/django/compare/master...test_custom_model_fields_master>> > > > > > > > > > > I run these test and here the result: > > > > > > *** 1.7.x with Py2: > > test_custom_model_field (custom_model_fields.tests.TestModel1Tests) > ... FAIL > > test_values (custom_model_fields.tests.TestModel1Tests) ... FAIL > > test_custom_model_field (custom_model_fields.tests.TestModel2Tests) > ... ok > > test_values (custom_model_fields.tests.TestModel2Tests) ... FAIL > > > > > > *** 1.7.x with Py3: > > test_custom_model_field (custom_model_fields.tests.TestModel1Tests) > ... FAIL > > test_values (custom_model_fields.tests.TestModel1Tests) ... FAIL > > test_custom_model_field (custom_model_fields.tests.TestModel2Tests) > ... FAIL > > test_values (custom_model_fields.tests.TestModel2Tests) ... FAIL > > > > > > > > *** 1.8.x with Py2: > > test_custom_model_field (custom_model_fields.tests.TestModel1Tests) > ... ok > > test_values (custom_model_fields.tests.TestModel1Tests) ... ok > > > > > > *** 1.8.x with Py3 > > test_custom_model_field (custom_model_fields.tests.TestModel1Tests) > ... ok > > test_values (custom_model_fields.tests.TestModel1Tests) ... ok > > > > > > > > *** master with Py2 - doesn't run: > > Traceback (most recent call last): > > File "/home/jens/PyLucid_env/src/django/tests/runtests.py", line > 12, in > > <module> > > from django.apps import apps > > File > "/home/jens/PyLucid_env/src/django/django/apps/__init__.py", line > > 1, in > > <module> > > from .config import AppConfig # NOQA > > File "/home/jens/PyLucid_env/src/django/django/apps/config.py", > line 6, in > > <module> > > from django.utils.module_loading import module_has_submodule > > File > "/home/jens/PyLucid_env/src/django/django/utils/module_loading.py", > > line > > 4, in <module> > > from importlib import import_module > > File > "/home/jens/PyLucid_env/src/django/django/utils/importlib.py", line 6, > > in <module> > > ImportError: cannot import name RemovedInDjango19Warning > > > > > > > > *** master with Py3: > > test_custom_model_field (custom_model_fields.tests.TestModel1Tests) > ... ok > > test_values (custom_model_fields.tests.TestModel1Tests) ... ok > > test_custom_model_field (custom_model_fields.tests.TestModel2Tests) > ... ok > > test_values (custom_model_fields.tests.TestModel2Tests) ... ok > > > > > > > > > > So the biggest problem is django 1.7.x... > > But it should work in the same way: > > < > https://docs.djangoproject.com/en/1.7/howto/custom-model-fields/#converting-database-values-to-python-objects > > > < > https://docs.djangoproject.com/en/1.7/howto/custom-model-fields/#converting-database-values-to-python-objects>> > > > > > > > > > > With 1.8.x i must remove the test with existing: > > __metaclass__ = models.SubfieldBase > > > > > > Otherwise the test will not run: > > > > Testing against Django installed in > '/home/jens/PyLucid_env/src/django/django' > > Importing application custom_model_fields > > Traceback (most recent call last): > > File "/home/jens/PyLucid_env/src/django/tests/runtests.py", line > 448, in > > <module> > > options.debug_sql) > > File "/home/jens/PyLucid_env/src/django/tests/runtests.py", line > 235, in > > django_tests > > state = setup(verbosity, test_labels) > > File "/home/jens/PyLucid_env/src/django/tests/runtests.py", line > 214, in > > setup > > apps.set_installed_apps(settings.INSTALLED_APPS) > > File > "/home/jens/PyLucid_env/src/django/django/apps/registry.py", line 324, > > in set_installed_apps > > self.populate(installed) > > File > "/home/jens/PyLucid_env/src/django/django/apps/registry.py", line 108, > > in populate > > app_config.import_models(all_models) > > File "/home/jens/PyLucid_env/src/django/django/apps/config.py", > line > > 198, in > > import_models > > self.models_module = import_module(models_module_name) > > File "/usr/lib/python2.7/importlib/__init__.py", line 37, in > import_module > > __import__(name) > > File > > > "/home/jens/PyLucid_env/src/django/tests/custom_model_fields/models.py", > > line 41, in <module> > > class CommaSeparatedModelField2(CommaSeparatedModelField1): > > File > > > "/home/jens/PyLucid_env/src/django/django/db/models/fields/subclassing.py", > > line > > 22, in __new__ > > RemovedInDjango20Warning) > > django.utils.deprecation.RemovedInDjango20Warning: SubfieldBase has > been > > deprecated. Use Field.from_db_value instead. > > > > > > > > Maybe i miss something to handle warnings with tests, but didn't > find something > > about warnings here: > > > > > https://docs.djangoproject.com/en/dev/internals/contributing/writing-code/unit-tests/ > > > < > https://docs.djangoproject.com/en/dev/internals/contributing/writing-code/unit-tests/> > > > > > > > > > > > > -- > > > > > > Mfg. > > > > Jens Diemer > > > > > > ---- > > http://www.jensdiemer.de > > > > -- > > You received this message because you are subscribed to the Google > Groups > > "Django developers (Contributions to Django itself)" group. > > To unsubscribe from this group and stop receiving emails from it, send > an email > > to django-develop...@googlegroups.com <javascript:> > > <mailto:django-developers+unsubscr...@googlegroups.com <javascript:>>. > > To post to this group, send email to > > django-d...@googlegroups.com <javascript:> > > <mailto:django-d...@googlegroups.com <javascript:>>. > > Visit this group at http://groups.google.com/group/django-developers. > > To view this discussion on the web visit > > > https://groups.google.com/d/msgid/django-developers/b7082532-d985-477a-947e-5afe39772e9c%40googlegroups.com > > > < > https://groups.google.com/d/msgid/django-developers/b7082532-d985-477a-947e-5afe39772e9c%40googlegroups.com?utm_medium=email&utm_source=footer>. > > > > For more options, visit https://groups.google.com/d/optout. > > > -- > > > Mfg. > > Jens Diemer > > > ---- > http://www.jensdiemer.de > > -- You received this message because you are subscribed to the Google Groups "Django developers (Contributions to Django itself)" group. 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