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101 lines
3.7 KiB
Python
101 lines
3.7 KiB
Python
import datetime
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import os
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import pickle
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import subprocess
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import sys
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import warnings
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from django.core.files.temp import NamedTemporaryFile
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from django.db import DJANGO_VERSION_PICKLE_KEY, models
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from django.test import TestCase, mock
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from django.utils._os import npath, upath
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from django.utils.encoding import force_text
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from django.utils.version import get_version
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from .models import Article
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class ModelPickleTestCase(TestCase):
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def test_missing_django_version_unpickling(self):
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"""
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#21430 -- Verifies a warning is raised for models that are
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unpickled without a Django version
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"""
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class MissingDjangoVersion(models.Model):
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title = models.CharField(max_length=10)
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def __reduce__(self):
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reduce_list = super(MissingDjangoVersion, self).__reduce__()
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data = reduce_list[-1]
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del data[DJANGO_VERSION_PICKLE_KEY]
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return reduce_list
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p = MissingDjangoVersion(title="FooBar")
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with warnings.catch_warnings(record=True) as recorded:
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pickle.loads(pickle.dumps(p))
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msg = force_text(recorded.pop().message)
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self.assertEqual(msg,
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"Pickled model instance's Django version is not specified.")
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def test_unsupported_unpickle(self):
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"""
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#21430 -- Verifies a warning is raised for models that are
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unpickled with a different Django version than the current
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"""
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class DifferentDjangoVersion(models.Model):
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title = models.CharField(max_length=10)
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def __reduce__(self):
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reduce_list = super(DifferentDjangoVersion, self).__reduce__()
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data = reduce_list[-1]
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data[DJANGO_VERSION_PICKLE_KEY] = '1.0'
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return reduce_list
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p = DifferentDjangoVersion(title="FooBar")
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with warnings.catch_warnings(record=True) as recorded:
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pickle.loads(pickle.dumps(p))
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msg = force_text(recorded.pop().message)
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self.assertEqual(
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msg,
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"Pickled model instance's Django version 1.0 does not "
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"match the current version %s." % get_version()
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)
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def test_unpickling_when_appregistrynotready(self):
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"""
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#24007 -- Verifies that a pickled model can be unpickled without having
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to manually setup the apps registry beforehand.
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"""
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script_template = """#!/usr/bin/env python
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import pickle
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from django.conf import settings
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data = %r
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settings.configure(DEBUG=False, INSTALLED_APPS=['model_regress'], SECRET_KEY = "blah")
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article = pickle.loads(data)
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print(article.headline)"""
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a = Article.objects.create(
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headline="Some object",
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pub_date=datetime.datetime.now(),
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article_text="This is an article",
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)
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with NamedTemporaryFile(mode='w+', suffix=".py") as script:
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script.write(script_template % pickle.dumps(a))
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script.flush()
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# A path to model_regress must be set in PYTHONPATH
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model_regress_dir = os.path.dirname(upath(__file__))
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model_regress_path = os.path.abspath(model_regress_dir)
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tests_path = os.path.split(model_regress_path)[0]
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pythonpath = os.environ.get('PYTHONPATH', '')
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pythonpath = npath(os.pathsep.join([tests_path, pythonpath]))
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with mock.patch.dict('os.environ', {'PYTHONPATH': pythonpath}):
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try:
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result = subprocess.check_output([sys.executable, script.name])
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except subprocess.CalledProcessError:
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self.fail("Unable to reload model pickled data")
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self.assertEqual(result.strip().decode(), "Some object")
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