check_databases_compatibility() - Code Metrics - noripyt/django-cachalot - Measure and Improve Code Quality continuously with Scrutinizer

check_databases_compatibility() C
last analyzed 2018-06-15 01:48 UTC

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Complexity

Conditions

Size

Total Lines

Duplication

Lines	0
Ratio	0 %

Importance

Changes	1
Bugs	0	Features	0

Metric	Value
cc	8
c	1
b	0
f	0
dl	0
loc	52
rs	5.5452

How to fix Long Method

from __future__ import unicode_literals

from django import __version__ as django__version__, VERSION as django_version
from django.apps import AppConfig
from django.conf import settings
from django.core.checks import register, Tags, Warning, Error
from cachalot.utils import ITERABLES

from .settings import (
    cachalot_settings, SUPPORTED_CACHE_BACKENDS, SUPPORTED_DATABASE_ENGINES,
    SUPPORTED_ONLY)


@register(Tags.compatibility)
def check_django_version(app_configs, **kwargs):
    if not (1, 11) <= django_version < (2, 1):
        return [Error(
            'Django %s is not compatible with this version of django-cachalot.'
            % django__version__,
            hint='Refer to the django-cachalot documentation to find '
                 'which versions are compatible.',
            id='cachalot.E003')]
    return []


@register(Tags.caches, Tags.compatibility)
def check_cache_compatibility(app_configs, **kwargs):
    cache = settings.CACHES[cachalot_settings.CACHALOT_CACHE]
    cache_backend = cache['BACKEND']
    if cache_backend not in SUPPORTED_CACHE_BACKENDS:
        return [Warning(
            'Cache backend %r is not supported by django-cachalot.'
            % cache_backend,
            hint='Switch to a supported cache backend '
                 'like Redis or Memcached.',
            id='cachalot.W001')]
    return []


@register(Tags.database, Tags.compatibility)
def check_databases_compatibility(app_configs, **kwargs):
    errors = []
    databases = settings.DATABASES
    original_enabled_databases = getattr(settings, 'CACHALOT_DATABASES',
                                         SUPPORTED_ONLY)
    enabled_databases = cachalot_settings.CACHALOT_DATABASES
    if original_enabled_databases == SUPPORTED_ONLY:
        if not cachalot_settings.CACHALOT_DATABASES:
            errors.append(Warning(
                'None of the configured databases are supported '
                'by django-cachalot.',
                hint='Use a supported database, or remove django-cachalot, or '
                     'put at least one database alias in `CACHALOT_DATABASES` '
                     'to force django-cachalot to use it.',
                id='cachalot.W002'
            ))
    elif enabled_databases.__class__ in ITERABLES:
        for db_alias in enabled_databases:
            if db_alias in databases:
                engine = databases[db_alias]['ENGINE']
                if engine not in SUPPORTED_DATABASE_ENGINES:
                    errors.append(Warning(
                        'Database engine %r is not supported '
                        'by django-cachalot.' % engine,
                        hint='Switch to a supported database engine.',
                        id='cachalot.W003'
                    ))
            else:
                errors.append(Error(
                    'Database alias %r from `CACHALOT_DATABASES` '
                    'is not defined in `DATABASES`.' % db_alias,
                    hint='Change `CACHALOT_DATABASES` to be compliant with'
                         '`CACHALOT_DATABASES`',
                    id='cachalot.E001',
                ))

        if not enabled_databases:
            errors.append(Warning(
                'Django-cachalot is useless because no database '
                'is configured in `CACHALOT_DATABASES`.',
                hint='Reconfigure django-cachalot or remove it.',
                id='cachalot.W004'
            ))
    else:
        errors.append(Error(
            "`CACHALOT_DATABASES` must be either %r or a list, tuple, "
            "frozenset or set of database aliases." % SUPPORTED_ONLY,
            hint='Remove `CACHALOT_DATABASES` or change it.',
            id='cachalot.E002',
        ))
    return errors


class CachalotConfig(AppConfig):
    name = 'cachalot'

    def ready(self):
        cachalot_settings.load()


1			from __future__ import unicode_literals
2
3			from django import __version__ as django__version__, VERSION as django_version
4			from django.apps import AppConfig
5			from django.conf import settings
6			from django.core.checks import register, Tags, Warning, Error
7			from cachalot.utils import ITERABLES
8
9			from .settings import (
10			cachalot_settings, SUPPORTED_CACHE_BACKENDS, SUPPORTED_DATABASE_ENGINES,
11			SUPPORTED_ONLY)
12
13
14			@register(Tags.compatibility)
15			def check_django_version(app_configs, **kwargs):
16			if not (1, 11) <= django_version < (2, 1):
17			return [Error(
18			'Django %s is not compatible with this version of django-cachalot.'
19			% django__version__,
20			hint='Refer to the django-cachalot documentation to find '
21			'which versions are compatible.',
22			id='cachalot.E003')]
23			return []
24
25
26			@register(Tags.caches, Tags.compatibility)
27			def check_cache_compatibility(app_configs, **kwargs):
28			cache = settings.CACHES[cachalot_settings.CACHALOT_CACHE]
29			cache_backend = cache['BACKEND']
30			if cache_backend not in SUPPORTED_CACHE_BACKENDS:
31			return [Warning(
32			'Cache backend %r is not supported by django-cachalot.'
33			% cache_backend,
34			hint='Switch to a supported cache backend '
35			'like Redis or Memcached.',
36			id='cachalot.W001')]
37			return []
38
39
40			@register(Tags.database, Tags.compatibility)
41			def check_databases_compatibility(app_configs, **kwargs):
42			errors = []
43			databases = settings.DATABASES
44			original_enabled_databases = getattr(settings, 'CACHALOT_DATABASES',
45			SUPPORTED_ONLY)
46			enabled_databases = cachalot_settings.CACHALOT_DATABASES
47			if original_enabled_databases == SUPPORTED_ONLY:
48			if not cachalot_settings.CACHALOT_DATABASES:
49			errors.append(Warning(
50			'None of the configured databases are supported '
51			'by django-cachalot.',
52			hint='Use a supported database, or remove django-cachalot, or '
53			'put at least one database alias in `CACHALOT_DATABASES` '
54			'to force django-cachalot to use it.',
55			id='cachalot.W002'
56			))
57			elif enabled_databases.__class__ in ITERABLES:
58			for db_alias in enabled_databases:
59			if db_alias in databases:
60			engine = databases[db_alias]['ENGINE']
61			if engine not in SUPPORTED_DATABASE_ENGINES:
62			errors.append(Warning(
63			'Database engine %r is not supported '
64			'by django-cachalot.' % engine,
65			hint='Switch to a supported database engine.',
66			id='cachalot.W003'
67			))
68			else:
69			errors.append(Error(
70			'Database alias %r from `CACHALOT_DATABASES` '
71			'is not defined in `DATABASES`.' % db_alias,
72			hint='Change `CACHALOT_DATABASES` to be compliant with'
73			'`CACHALOT_DATABASES`',
74			id='cachalot.E001',
75			))
76
77			if not enabled_databases:
78			errors.append(Warning(
79			'Django-cachalot is useless because no database '
80			'is configured in `CACHALOT_DATABASES`.',
81			hint='Reconfigure django-cachalot or remove it.',
82			id='cachalot.W004'
83			))
84			else:
85			errors.append(Error(
86			"`CACHALOT_DATABASES` must be either %r or a list, tuple, "
87			"frozenset or set of database aliases." % SUPPORTED_ONLY,
88			hint='Remove `CACHALOT_DATABASES` or change it.',
89			id='cachalot.E002',
90			))
91			return errors
92
93
94			class CachalotConfig(AppConfig):
95			name = 'cachalot'
96
97			def ready(self):
98			cachalot_settings.load()
99

noripyt / django-cachalot

check_databases_compatibility() C last analyzed 2018-06-15 01:48 UTC

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check_databases_compatibility() C
last analyzed 2018-06-15 01:48 UTC