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https://github.com/Hopiu/django-cachalot.git
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165cdb6a00
* Remove system check for Django version * Closes #175 * Bump version and amend CHANGELOG * Update with GitHub action CI * Update README with Python and Django versions * Limit Django version to 3.2, inclusively. * Add note on Django constraints to README * Bump minor version * Justified by dropping support for dependency versions * Drop support for Django 2.0-2.1, Python 3.5 * Change CI badge in README to GitHub actions * Add support for Pymemcache for Django 3.2+ * Add Django 3.2 to test matrix * Fix MySQL test_explain * Allow filebased delta leniency in tests * Allow Subquery in finding more Subqueries (Fixes #156) * Reverts #157 with proper fix. The initial problem was due to `django.db.models.expressions.Subquery` allowing both QuerySet and sql.Query to be used. * Fixes Django 3.2 test_subquery and test_invalidate_subquery testing by also checking the lhs * Fix Django 2.2 Subquery having no query attr * Fix filebased test time delta * Fix test_invalidate_having due to new inner_query * The new inner_query replaces subquery for Django 3.2 where subquery is now a boolean. That's why I initially used that TypeError in _get_tables_from_sql. inner_query looks to be a sql.Query * Add PyMemcacheCache to supported cache backends Co-authored-by: Dominik George <nik@naturalnet.de>
87 lines
3.5 KiB
Python
87 lines
3.5 KiB
Python
import copyreg
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from django.apps import AppConfig
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from django.conf import settings
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from django.core.checks import register, Tags, Warning, Error
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from cachalot.utils import ITERABLES
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from .settings import (
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cachalot_settings, SUPPORTED_CACHE_BACKENDS, SUPPORTED_DATABASE_ENGINES,
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SUPPORTED_ONLY)
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@register(Tags.caches, Tags.compatibility)
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def check_cache_compatibility(app_configs, **kwargs):
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cache = settings.CACHES[cachalot_settings.CACHALOT_CACHE]
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cache_backend = cache['BACKEND']
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if cache_backend not in SUPPORTED_CACHE_BACKENDS:
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return [Warning(
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'Cache backend %r is not supported by django-cachalot.'
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% cache_backend,
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hint='Switch to a supported cache backend '
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'like Redis or Memcached.',
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id='cachalot.W001')]
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return []
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@register(Tags.database, Tags.compatibility)
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def check_databases_compatibility(app_configs, **kwargs):
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errors = []
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databases = settings.DATABASES
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original_enabled_databases = getattr(settings, 'CACHALOT_DATABASES',
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SUPPORTED_ONLY)
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enabled_databases = cachalot_settings.CACHALOT_DATABASES
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if original_enabled_databases == SUPPORTED_ONLY:
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if not cachalot_settings.CACHALOT_DATABASES:
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errors.append(Warning(
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'None of the configured databases are supported '
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'by django-cachalot.',
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hint='Use a supported database, or remove django-cachalot, or '
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'put at least one database alias in `CACHALOT_DATABASES` '
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'to force django-cachalot to use it.',
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id='cachalot.W002'
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))
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elif enabled_databases.__class__ in ITERABLES:
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for db_alias in enabled_databases:
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if db_alias in databases:
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engine = databases[db_alias]['ENGINE']
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if engine not in SUPPORTED_DATABASE_ENGINES:
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errors.append(Warning(
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'Database engine %r is not supported '
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'by django-cachalot.' % engine,
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hint='Switch to a supported database engine.',
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id='cachalot.W003'
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))
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else:
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errors.append(Error(
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'Database alias %r from `CACHALOT_DATABASES` '
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'is not defined in `DATABASES`.' % db_alias,
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hint='Change `CACHALOT_DATABASES` to be compliant with'
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'`CACHALOT_DATABASES`',
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id='cachalot.E001',
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))
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if not enabled_databases:
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errors.append(Warning(
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'Django-cachalot is useless because no database '
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'is configured in `CACHALOT_DATABASES`.',
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hint='Reconfigure django-cachalot or remove it.',
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id='cachalot.W004'
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))
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else:
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errors.append(Error(
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"`CACHALOT_DATABASES` must be either %r or a list, tuple, "
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"frozenset or set of database aliases." % SUPPORTED_ONLY,
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hint='Remove `CACHALOT_DATABASES` or change it.',
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id='cachalot.E002',
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))
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return errors
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class CachalotConfig(AppConfig):
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name = 'cachalot'
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def ready(self):
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# Cast memoryview objects to bytes to be able to pickle them.
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# https://docs.python.org/3/library/copyreg.html#copyreg.pickle
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copyreg.pickle(memoryview, lambda val: (memoryview, (bytes(val),)))
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cachalot_settings.load()
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