Ticket #28982: and_or.patch

File and_or.patch, 43.4 KB (added by Дилян Палаузов, 6 years ago)

  • django/contrib/admin/sites.py 

    diff --git a/django/contrib/admin/sites.py b/django/contrib/admin/sites.py
    a b class AdminSite:  
    9494
    9595        If a model is abstract, raise ImproperlyConfigured.
    9696        """
    97         if not admin_class:
    98             admin_class = ModelAdmin
     97        admin_class = admin_class or ModelAdmin
    9998
    10099        if isinstance(model_or_iterable, ModelBase):
    101100            model_or_iterable = [model_or_iterable]

  • django/contrib/admin/views/main.py 

    diff --git a/django/contrib/admin/views/main.py b/django/contrib/admin/views/main.py
    a b class ChangeList:  
    8686        """
    8787        Return all params except IGNORED_PARAMS.
    8888        """
    89         if not params:
    90             params = self.params
     89        params = params or self.params
    9190        lookup_params = params.copy()  # a dictionary of the query string
    9291        # Remove all the parameters that are globally and systematically
    9392        # ignored.

  • django/contrib/admindocs/utils.py 

    diff --git a/django/contrib/admindocs/utils.py b/django/contrib/admindocs/utils.py
    a b def parse_rst(text, default_reference_context, thing_being_parsed=None):  
    7171        'raw_enabled': False,
    7272        'file_insertion_enabled': False,
    7373    }
    74     if thing_being_parsed:
    75         thing_being_parsed = force_bytes("<%s>" % thing_being_parsed)
     74    thing_being_parsed = thing_being_parsed and force_bytes("<%s>" % thing_being_parsed)
    7675    # Wrap ``text`` in some reST that sets the default role to ``cmsreference``,
    7776    # then restores it.
    7877    source = """

  • django/contrib/admindocs/views.py 

    diff --git a/django/contrib/admindocs/views.py b/django/contrib/admindocs/views.py
    a b class TemplateTagIndexView(BaseAdminDocsView):  
    7575            for module_name, library in builtin_libs + app_libs:
    7676                for tag_name, tag_func in library.tags.items():
    7777                    title, body, metadata = utils.parse_docstring(tag_func.__doc__)
    78                     if title:
    79                         title = utils.parse_rst(title, 'tag', _('tag:') + tag_name)
    80                     if body:
    81                         body = utils.parse_rst(body, 'tag', _('tag:') + tag_name)
     78                    title = title and utils.parse_rst(title, 'tag', _('tag:') + tag_name)
     79                    body = body and utils.parse_rst(body, 'tag', _('tag:') + tag_name)
    8280                    for key in metadata:
    8381                        metadata[key] = utils.parse_rst(metadata[key], 'tag', _('tag:') + tag_name)
    8482                    tag_library = module_name.split('.')[-1]
    … … class TemplateFilterIndexView(BaseAdminDocsView):  
    108106            for module_name, library in builtin_libs + app_libs:
    109107                for filter_name, filter_func in library.filters.items():
    110108                    title, body, metadata = utils.parse_docstring(filter_func.__doc__)
    111                     if title:
    112                         title = utils.parse_rst(title, 'filter', _('filter:') + filter_name)
    113                     if body:
    114                         body = utils.parse_rst(body, 'filter', _('filter:') + filter_name)
     109                    title = title and utils.parse_rst(title, 'filter', _('filter:') + filter_name)
     110                    body = body and utils.parse_rst(body, 'filter', _('filter:') + filter_name)
    115111                    for key in metadata:
    116112                        metadata[key] = utils.parse_rst(metadata[key], 'filter', _('filter:') + filter_name)
    117113                    tag_library = module_name.split('.')[-1]
    … … class ViewDetailView(BaseAdminDocsView):  
    174170        if view_func is None:
    175171            raise Http404
    176172        title, body, metadata = utils.parse_docstring(view_func.__doc__)
    177         if title:
    178             title = utils.parse_rst(title, 'view', _('view:') + view)
    179         if body:
    180             body = utils.parse_rst(body, 'view', _('view:') + view)
     173        title = title and utils.parse_rst(title, 'view', _('view:') + view)
     174        body = body and utils.parse_rst(body, 'view', _('view:') + view)
    181175        for key in metadata:
    182176            metadata[key] = utils.parse_rst(metadata[key], 'model', _('view:') + view)
    183177        return super().get_context_data(**{
    … … class ModelDetailView(BaseAdminDocsView):  
    215209        opts = model._meta
    216210
    217211        title, body, metadata = utils.parse_docstring(model.__doc__)
    218         if title:
    219             title = utils.parse_rst(title, 'model', _('model:') + model_name)
    220         if body:
    221             body = utils.parse_rst(body, 'model', _('model:') + model_name)
     212        title = title and utils.parse_rst(title, 'model', _('model:') + model_name)
     213        body = body and utils.parse_rst(body, 'model', _('model:') + model_name)
    222214
    223215        # Gather fields/field descriptions.
    224216        fields = []
    … … class ModelDetailView(BaseAdminDocsView):  
    275267                except StopIteration:
    276268                    continue
    277269                verbose = func.__doc__
    278                 if verbose:
    279                     verbose = utils.parse_rst(utils.trim_docstring(verbose), 'model', _('model:') + opts.model_name)
     270                verbose = verbose and utils.parse_rst(utils.trim_docstring(verbose), 'model', _('model:') + opts.model_name)
    280271                # If a method has no arguments, show it as a 'field', otherwise
    281272                # as a 'method with arguments'.
    282273                if func_has_no_args(func) and not func_accepts_kwargs(func) and not func_accepts_var_args(func):

  • django/contrib/auth/admin.py 

    diff --git a/django/contrib/auth/admin.py b/django/contrib/auth/admin.py
    a b class UserAdmin(admin.ModelAdmin):  
    8989
    9090    def lookup_allowed(self, lookup, value):
    9191        # See #20078: we don't want to allow any lookups involving passwords.
    92         if lookup.startswith('password'):
    93             return False
    94         return super().lookup_allowed(lookup, value)
     92        return not lookup.startswith('password') and super().lookup_allowed(lookup, value)
    9593
    9694    @sensitive_post_parameters_m
    9795    @csrf_protect_m

  • django/contrib/auth/backends.py 

    diff --git a/django/contrib/auth/backends.py b/django/contrib/auth/backends.py
    a b class ModelBackend:  
    8282        return user_obj._perm_cache
    8383
    8484    def has_perm(self, user_obj, perm, obj=None):
    85         if not user_obj.is_active:
    86             return False
    87         return perm in self.get_all_permissions(user_obj, obj)
     85        return user_obj.is_active and perm in self.get_all_permissions(user_obj, obj)
    8886
    8987    def has_module_perms(self, user_obj, app_label):
    9088        """

  • django/contrib/auth/hashers.py 

    diff --git a/django/contrib/auth/hashers.py b/django/contrib/auth/hashers.py
    a b def make_password(password, salt=None, hasher='default'):  
    7474        return UNUSABLE_PASSWORD_PREFIX + get_random_string(UNUSABLE_PASSWORD_SUFFIX_LENGTH)
    7575    hasher = get_hasher(hasher)
    7676
    77     if not salt:
    78         salt = hasher.salt()
     77    salt = salt or hasher.salt()
    7978
    8079    return hasher.encode(password, salt)
    8180
    … … class PBKDF2PasswordHasher(BasePasswordHasher):  
    244243    def encode(self, password, salt, iterations=None):
    245244        assert password is not None
    246245        assert salt and '$' not in salt
    247         if not iterations:
    248             iterations = self.iterations
     246        iterations = iterations or self.iterations
    249247        hash = pbkdf2(password, salt, iterations, digest=self.digest)
    250248        hash = base64.b64encode(hash).decode('ascii').strip()
    251249        return "%s$%d$%s$%s" % (self.algorithm, iterations, salt, hash)

  • django/contrib/auth/views.py 

    diff --git a/django/contrib/auth/views.py b/django/contrib/auth/views.py
    a b def logout_then_login(request, login_url=None):  
    164164    """
    165165    Log out the user if they are logged in. Then redirect to the login page.
    166166    """
    167     if not login_url:
    168         login_url = settings.LOGIN_URL
    169     login_url = resolve_url(login_url)
     167    login_url = resolve_url(login_url or settings.LOGIN_URL)
    170168    return LogoutView.as_view(next_page=login_url)(request)
    171169
    172170

  • django/contrib/gis/gdal/raster/band.py 

    diff --git a/django/contrib/gis/gdal/raster/band.py b/django/contrib/gis/gdal/raster/band.py
    a b class GDALBand(GDALRasterBase):  
    186186
    187187        Allowed input data types are bytes, memoryview, list, tuple, and array.
    188188        """
    189         if not offset:
    190             offset = (0, 0)
    191 
    192         if not size:
    193             size = (self.width - offset[0], self.height - offset[1])
    194 
    195         if not shape:
    196             shape = size
    197 
     189        offset = offset or (0, 0)
     190        size = size or (self.width - offset[0], self.height - offset[1])
     191        shape = shape or size
    198192        if any(x <= 0 for x in size):
    199193            raise ValueError('Offset too big for this raster.')
    200194

  • django/contrib/gis/geoip2/base.py 

    diff --git a/django/contrib/gis/geoip2/base.py b/django/contrib/gis/geoip2/base.py
    a b class GeoIP2:  
    7373            raise GeoIP2Exception('Invalid GeoIP caching option: %s' % cache)
    7474
    7575        # Getting the GeoIP data path.
     76        path = path or GEOIP_SETTINGS['GEOIP_PATH']
    7677        if not path:
    77             path = GEOIP_SETTINGS['GEOIP_PATH']
    78             if not path:
    79                 raise GeoIP2Exception('GeoIP path must be provided via parameter or the GEOIP_PATH setting.')
     78            raise GeoIP2Exception('GeoIP path must be provided via parameter or the GEOIP_PATH setting.')
    8079        if not isinstance(path, str):
    8180            raise TypeError('Invalid path type: %s' % type(path).__name__)
    8281
    … … class GeoIP2:  
    115114
    116115    @property
    117116    def _reader(self):
    118         if self._country:
    119             return self._country
    120         else:
    121             return self._city
     117        return self._country or self._city
    122118
    123119    @property
    124120    def _country_or_city(self):

  • django/contrib/gis/geos/prototypes/io.py 

    diff --git a/django/contrib/gis/geos/prototypes/io.py b/django/contrib/gis/geos/prototypes/io.py
    a b thread_context = ThreadLocalIO()  
    300300# These module-level routines return the I/O object that is local to the
    301301# thread. If the I/O object does not exist yet it will be initialized.
    302302def wkt_r():
    303     if not thread_context.wkt_r:
    304         thread_context.wkt_r = _WKTReader()
     303    thread_context.wkt_r = thread_context.wkt_r or _WKTReader()
    305304    return thread_context.wkt_r
    306305
    307306
    … … def wkt_w(dim=2, trim=False, precision=None):  
    316315
    317316
    318317def wkb_r():
    319     if not thread_context.wkb_r:
    320         thread_context.wkb_r = _WKBReader()
     318    thread_context.wkb_r = thread_context.wkb_r or _WKBReader()
    321319    return thread_context.wkb_r
    322320
    323321

  • django/contrib/gis/geos/prototypes/threadsafe.py 

    diff --git a/django/contrib/gis/geos/prototypes/threadsafe.py b/django/contrib/gis/geos/prototypes/threadsafe.py
    a b class GEOSFunc:  
    4141
    4242    def __call__(self, *args):
    4343        # Create a context handle if one doesn't exist for this thread.
    44         if not self.thread_context.handle:
    45             self.thread_context.handle = GEOSContextHandle()
     44        self.thread_context.handle = self.thread_context.handle or GEOSContextHandle()
    4645        # Call the threaded GEOS routine with the pointer of the context handle
    4746        # as the first argument.
    4847        return self.cfunc(self.thread_context.handle.ptr, *args)

  • django/contrib/gis/utils/srs.py 

    diff --git a/django/contrib/gis/utils/srs.py b/django/contrib/gis/utils/srs.py
    a b def add_srs_entry(srs, auth_name='EPSG', auth_srid=None, ref_sys_name=None,  
    3232      of `django.db.DEFAULT_DB_ALIAS` (at the time of this writing, its value
    3333      is 'default').
    3434    """
    35     if not database:
    36         database = DEFAULT_DB_ALIAS
     35    database = database or DEFAULT_DB_ALIAS
    3736    connection = connections[database]
    3837
    3938    if not hasattr(connection.ops, 'spatial_version'):

  • django/contrib/sessions/backends/base.py 

    diff --git a/django/contrib/sessions/backends/base.py b/django/contrib/sessions/backends/base.py
    a b class SessionBase:  
    241241
    242242        if isinstance(expiry, datetime):
    243243            return expiry
    244         if not expiry:   # Checks both None and 0 cases
    245             expiry = settings.SESSION_COOKIE_AGE
     244        expirity = expiry or settings.SESSION_COOKIE_AGE   # Checks both None and 0 cases
    246245        return modification + timedelta(seconds=expiry)
    247246
    248247    def set_expiry(self, value):

  • django/contrib/sessions/backends/cached_db.py 

    diff --git a/django/contrib/sessions/backends/cached_db.py b/django/contrib/sessions/backends/cached_db.py
    a b class SessionStore(DBStore):  
    4141        return data
    4242
    4343    def exists(self, session_key):
    44         if session_key and (self.cache_key_prefix + session_key) in self._cache:
    45             return True
    46         return super().exists(session_key)
     44        return session_key and (self.cache_key_prefix + session_key) in self._cache or super().exists(session_key)
    4745
    4846    def save(self, must_create=False):
    4947        super().save(must_create)

  • django/contrib/sessions/backends/file.py 

    diff --git a/django/contrib/sessions/backends/file.py b/django/contrib/sessions/backends/file.py
    a b class SessionStore(SessionBase):  
    2727        try:
    2828            return cls._storage_path
    2929        except AttributeError:
    30             storage_path = getattr(settings, "SESSION_FILE_PATH", None)
    31             if not storage_path:
    32                 storage_path = tempfile.gettempdir()
     30            storage_path = getattr(settings, "SESSION_FILE_PATH", None) or tempfile.gettempdir()
    3331
    3432            # Make sure the storage path is valid.
    3533            if not os.path.isdir(storage_path):

  • django/contrib/staticfiles/storage.py 

    diff --git a/django/contrib/staticfiles/storage.py b/django/contrib/staticfiles/storage.py
    a b class HashedFilesMixin:  
    8585        # `name` is the base name to construct the new hashed filename from.
    8686        parsed_name = urlsplit(unquote(name))
    8787        clean_name = parsed_name.path.strip()
    88         if filename:
    89             filename = urlsplit(unquote(filename)).path.strip()
    90         filename = filename or clean_name
     88        filename = (filename and urlsplit(unquote(filename)).path.strip()) or clean_name
    9189        opened = False
    9290        if content is None:
    9391            if not self.exists(filename):

  • django/core/cache/backends/locmem.py 

    diff --git a/django/core/cache/backends/locmem.py b/django/core/cache/backends/locmem.py
    a b class LocMemCache(BaseCache):  
    9898
    9999    def _has_expired(self, key):
    100100        exp = self._expire_info.get(key, -1)
    101         if exp is None or exp > time.time():
    102             return False
    103         return True
     101        return exp is not None and exp <= time.time()
    104102
    105103    def _cull(self):
    106104        if self._cull_frequency == 0:

  • django/core/files/base.py 

    diff --git a/django/core/files/base.py b/django/core/files/base.py
    a b class File(FileProxyMixin):  
    5959        Read the file and yield chunks of ``chunk_size`` bytes (defaults to
    6060        ``UploadedFile.DEFAULT_CHUNK_SIZE``).
    6161        """
    62         if not chunk_size:
    63             chunk_size = self.DEFAULT_CHUNK_SIZE
     62        chunk_size = chunk_size or self.DEFAULT_CHUNK_SIZE
    6463
    6564        try:
    6665            self.seek(0)
    … … class File(FileProxyMixin):  
    8180        always return ``False`` -- there's no good reason to read from memory in
    8281        chunks.
    8382        """
    84         if not chunk_size:
    85             chunk_size = self.DEFAULT_CHUNK_SIZE
    86         return self.size > chunk_size
     83        return self.size > (chunk_size or self.DEFAULT_CHUNK_SIZE)
    8784
    8885    def __iter__(self):
    8986        # Iterate over this file-like object by newlines

  • django/core/handlers/wsgi.py 

    diff --git a/django/core/handlers/wsgi.py b/django/core/handlers/wsgi.py
    a b def get_script_name(environ):  
    176176    # rewrites. Unfortunately not every Web server (lighttpd!) passes this
    177177    # information through all the time, so FORCE_SCRIPT_NAME, above, is still
    178178    # needed.
    179     script_url = get_bytes_from_wsgi(environ, 'SCRIPT_URL', '')
    180     if not script_url:
    181         script_url = get_bytes_from_wsgi(environ, 'REDIRECT_URL', '')
     179    script_url = get_bytes_from_wsgi(environ, 'SCRIPT_URL', '') or get_bytes_from_wsgi(environ, 'REDIRECT_URL', '')
    182180
    183181    if script_url:
    184182        if b'//' in script_url:

  • django/core/mail/message.py 

    diff --git a/django/core/mail/message.py b/django/core/mail/message.py
    a b class EmailMessage:  
    309309            self.attachments.append(filename)
    310310        else:
    311311            assert content is not None
    312 
    313             if not mimetype:
    314                 mimetype, _ = mimetypes.guess_type(filename)
    315                 if not mimetype:
    316                     mimetype = DEFAULT_ATTACHMENT_MIME_TYPE
     312            mimetype = mimetype or mimetypes.guess_type(filename)[0] or DEFAULT_ATTACHMENT_MIME_TYPE
    317313            basetype, subtype = mimetype.split('/', 1)
    318314
    319315            if basetype == 'text':

  • django/core/management/color.py 

    diff --git a/django/core/management/color.py b/django/core/management/color.py
    a b def supports_color():  
    1919
    2020    # isatty is not always implemented, #6223.
    2121    is_a_tty = hasattr(sys.stdout, 'isatty') and sys.stdout.isatty()
    22     if not supported_platform or not is_a_tty:
    23         return False
    24     return True
     22    return supported_platform and is_a_tty
    2523
    2624
    2725class Style:

  • django/core/management/commands/makemessages.py 

    diff --git a/django/core/management/commands/makemessages.py b/django/core/management/commands/makemessages.py
    a b class Command(BaseCommand):  
    502502                        if os.path.abspath(dirpath).startswith(os.path.dirname(path)):
    503503                            locale_dir = path
    504504                            break
    505                     if not locale_dir:
    506                         locale_dir = self.default_locale_path or NO_LOCALE_DIR
     505                    locale_dir = locale_dir or self.default_locale_path or NO_LOCALE_DIR
    507506                    all_files.append(self.translatable_file_class(dirpath, filename, locale_dir))
    508507        return sorted(all_files)
    509508

  • django/core/serializers/base.py 

    diff --git a/django/core/serializers/base.py b/django/core/serializers/base.py
    a b class Serializer:  
    9696                        self.handle_m2m_field(obj, field)
    9797            self.end_object(obj)
    9898            progress_bar.update(count)
    99             if self.first:
    100                 self.first = False
     99            self.first = self.first and False
    101100        self.end_serialization()
    102101        return self.getvalue()
    103102

  • django/db/backends/mysql/schema.py 

    diff --git a/django/db/backends/mysql/schema.py b/django/db/backends/mysql/schema.py
    a b class DatabaseSchemaEditor(BaseDatabaseSchemaEditor):  
    6161                field.get_internal_type() == 'ForeignKey' and
    6262                field.db_constraint):
    6363            return False
    64         if self._is_limited_data_type(field):
    65             return False
    66         return create_index
     64        return not self._is_limited_data_type(field) and create_index
    6765
    6866    def _delete_composed_index(self, model, fields, *args):
    6967        """

  • django/db/backends/postgresql/creation.py 

    diff --git a/django/db/backends/postgresql/creation.py b/django/db/backends/postgresql/creation.py
    a b class DatabaseCreation(BaseDatabaseCreation):  
    1616            suffix += " ENCODING '{}'".format(encoding)
    1717        if template:
    1818            suffix += " TEMPLATE {}".format(self._quote_name(template))
    19         if suffix:
    20             suffix = "WITH" + suffix
    21         return suffix
     19        return suffix and "WITH" + suffix
    2220
    2321    def sql_table_creation_suffix(self):
    2422        test_settings = self.connection.settings_dict['TEST']

  • django/db/backends/postgresql/operations.py 

    diff --git a/django/db/backends/postgresql/operations.py b/django/db/backends/postgresql/operations.py
    a b class DatabaseOperations(BaseDatabaseOperations):  
    131131        sql = []
    132132        for sequence_info in sequences:
    133133            table_name = sequence_info['table']
    134             column_name = sequence_info['column']
    135             if not column_name:
     134            column_name = sequence_info['column'] or 'id'
    136135                # This will be the case if it's an m2m using an autogenerated
    137136                # intermediate table (see BaseDatabaseIntrospection.sequence_list)
    138                 column_name = 'id'
    139137            sql.append("%s setval(pg_get_serial_sequence('%s','%s'), 1, false);" % (
    140138                style.SQL_KEYWORD('SELECT'),
    141139                style.SQL_TABLE(self.quote_name(table_name)),

  • django/db/models/aggregates.py 

    diff --git a/django/db/models/aggregates.py b/django/db/models/aggregates.py
    a b class Aggregate(Func):  
    3131        return source_expressions
    3232
    3333    def set_source_expressions(self, exprs):
    34         if self.filter:
    35             self.filter = exprs.pop()
     34        self.filter = self.filer and exprs.pop()
    3635        return super().set_source_expressions(exprs)
    3736
    3837    def resolve_expression(self, query=None, allow_joins=True, reuse=None, summarize=False, for_save=False):
    3938        # Aggregates are not allowed in UPDATE queries, so ignore for_save
    4039        c = super().resolve_expression(query, allow_joins, reuse, summarize)
    41         if c.filter:
    42             c.filter = c.filter.resolve_expression(query, allow_joins, reuse, summarize)
     40        c.filter = c.filter and c.filter.resolve_expression(query, allow_joins, reuse, summarize)
    4341        if not summarize:
    4442            # Call Aggregate.get_source_expressions() to avoid
    4543            # returning self.filter and including that in this loop.

  • django/db/models/base.py 

    diff --git a/django/db/models/base.py b/django/db/models/base.py
    a b class Model(metaclass=ModelBase):  
    549549        self.__dict__.update(state)
    550550
    551551    def _get_pk_val(self, meta=None):
    552         if not meta:
    553             meta = self._meta
     552        meta = meta or self._meta
    554553        return getattr(self, meta.pk.attname)
    555554
    556555    def _set_pk_val(self, value):
    … … class Model(metaclass=ModelBase):  
    852851            # exists.
    853852            return update_fields is not None or filtered.exists()
    854853        if self._meta.select_on_save and not forced_update:
    855             if filtered.exists():
     854            return (filtered.exists() and
    856855                # It may happen that the object is deleted from the DB right after
    857856                # this check, causing the subsequent UPDATE to return zero matching
    858857                # rows. The same result can occur in some rare cases when the
    … … class Model(metaclass=ModelBase):  
    860859                # successfully (a row is matched and updated). In order to
    861860                # distinguish these two cases, the object's existence in the
    862861                # database is again checked for if the UPDATE query returns 0.
    863                 return filtered._update(values) > 0 or filtered.exists()
    864             else:
    865                 return False
     862                (filtered._update(values) > 0 or filtered.exists()))
    866863        return filtered._update(values) > 0
    867864
    868865    def _do_insert(self, manager, using, fields, update_pk, raw):

  • django/db/models/fields/__init__.py 

    diff --git a/django/db/models/fields/__init__.py b/django/db/models/fields/__init__.py
    a b class Field(RegisterLookupMixin):  
    694694        return self._db_tablespace or settings.DEFAULT_INDEX_TABLESPACE
    695695
    696696    def set_attributes_from_name(self, name):
    697         if not self.name:
    698             self.name = name
     697        self.name = self.name or name
    699698        self.attname, self.column = self.get_attname_column()
    700699        self.concrete = self.column is not None
    701700        if self.verbose_name is None and self.name:

  • django/db/models/fields/files.py 

    diff --git a/django/db/models/fields/files.py b/django/db/models/fields/files.py
    a b class FileField(Field):  
    314314        if data is not None:
    315315            # This value will be converted to str and stored in the
    316316            # database, so leaving False as-is is not acceptable.
    317             if not data:
    318                 data = ''
    319             setattr(instance, self.name, data)
     317            setattr(instance, self.name, data or '')
    320318
    321319    def formfield(self, **kwargs):
    322320        return super().formfield(**{

  • django/db/models/lookups.py 

    diff --git a/django/db/models/lookups.py b/django/db/models/lookups.py
    a b class FieldGetDbPrepValueMixin:  
    177177    def get_db_prep_lookup(self, value, connection):
    178178        # For relational fields, use the output_field of the 'field' attribute.
    179179        field = getattr(self.lhs.output_field, 'field', None)
    180         get_db_prep_value = getattr(field, 'get_db_prep_value', None)
    181         if not get_db_prep_value:
    182             get_db_prep_value = self.lhs.output_field.get_db_prep_value
     180        get_db_prep_value = getattr(field, 'get_db_prep_value', None) or self.lhs.output_field.get_db_prep_value
    183181        return (
    184182            '%s',
    185183            [get_db_prep_value(v, connection, prepared=True) for v in value]

  • django/db/models/manager.py 

    diff --git a/django/db/models/manager.py b/django/db/models/manager.py
    a b class BaseManager:  
    107107        })
    108108
    109109    def contribute_to_class(self, model, name):
    110         if not self.name:
    111             self.name = name
     110        self.name = self.name or name
    112111        self.model = model
    113112
    114113        setattr(model, name, ManagerDescriptor(self))

  • django/db/models/sql/compiler.py 

    diff --git a/django/db/models/sql/compiler.py b/django/db/models/sql/compiler.py
    a b class SQLCompiler:  
    521521                if grouping:
    522522                    if distinct_fields:
    523523                        raise NotImplementedError('annotate() + distinct(fields) is not implemented.')
    524                     if not order_by:
    525                         order_by = self.connection.ops.force_no_ordering()
     524                    order_by = order_by or self.connection.ops.force_no_ordering()
    526525                    result.append('GROUP BY %s' % ', '.join(grouping))
    527526
    528527                if having:
    … … class SQLCompiler:  
    588587        if opts is None:
    589588            opts = self.query.get_meta()
    590589        only_load = self.deferred_to_columns()
    591         if not start_alias:
    592             start_alias = self.query.get_initial_alias()
     590        start_alias = start_alias or self.query.get_initial_alias()
    593591        # The 'seen_models' is used to optimize checking the needed parent
    594592        # alias for a given field. This also includes None -> start_alias to
    595593        # be used by local fields.
    … … class SQLCompiler:  
    657655        # of the field is specified.
    658656        if field.is_relation and opts.ordering and getattr(field, 'attname', None) != name:
    659657            # Firstly, avoid infinite loops.
    660             if not already_seen:
    661                 already_seen = set()
     658            already_seen = already_seen or set()
    662659            join_tuple = tuple(getattr(self.query.alias_map[j], 'join_cols', None) for j in joins)
    663660            if join_tuple in already_seen:
    664661                raise FieldError('Infinite loop caused by ordering.')
    … … class SQLCompiler:  
    680677        same input, as the prefixes of get_ordering() and get_distinct() must
    681678        match. Executing SQL where this is not true is an error.
    682679        """
    683         if not alias:
    684             alias = self.query.get_initial_alias()
     680        alias = alias or self.query.get_initial_alias()
    685681        field, targets, opts, joins, path = self.query.setup_joins(
    686682            pieces, opts, alias)
    687683        alias = joins[-1]
    … … class SQLCompiler:  
    10371033        is needed, as the filters describe an empty set. In that case, None is
    10381034        returned, to avoid any unnecessary database interaction.
    10391035        """
    1040         if not result_type:
    1041             result_type = NO_RESULTS
     1036        result_type = result_type or NO_RESULTS
    10421037        try:
    10431038            sql, params = self.as_sql()
    10441039            if not sql:

  • django/db/models/sql/query.py 

    diff --git a/django/db/models/sql/query.py b/django/db/models/sql/query.py
    a b class Query:  
    805805        if isinstance(self.group_by, tuple):
    806806            self.group_by = tuple([col.relabeled_clone(change_map) for col in self.group_by])
    807807        self.select = tuple([col.relabeled_clone(change_map) for col in self.select])
    808         if self._annotations:
    809             self._annotations = OrderedDict(
    810                 (key, col.relabeled_clone(change_map)) for key, col in self._annotations.items())
     808        self._annotations = self._annotations and OrderedDict(
     809            (key, col.relabeled_clone(change_map)) for key, col in self._annotations.items())
    811810
    812811        # 2. Rename the alias in the internal table/alias datastructures.
    813812        for old_alias, new_alias in change_map.items():
    … … class Query:  
    10611060        and get_transform().
    10621061        """
    10631062        # __exact is the default lookup if one isn't given.
    1064         if not lookups:
    1065             lookups = ['exact']
     1063        lookups = lookups or ['exact']
    10661064
    10671065        for name in lookups[:-1]:
    10681066            lhs = self.try_transform(lhs, name)
    … … class Query:  
    20502048        # used. The proper fix would be to defer all decisions where
    20512049        # is_nullable() is needed to the compiler stage, but that is not easy
    20522050        # to do currently.
    2053         if connections[DEFAULT_DB_ALIAS].features.interprets_empty_strings_as_nulls and field.empty_strings_allowed:
    2054             return True
    2055         else:
    2056             return field.null
     2051        return connections[DEFAULT_DB_ALIAS].features.interprets_empty_strings_as_nulls and field.empty_strings_allowed or field.null
    20572052
    20582053
    20592054def get_order_dir(field, default='ASC'):

  • django/forms/boundfield.py 

    diff --git a/django/forms/boundfield.py b/django/forms/boundfield.py
    a b class BoundField:  
    7979        attributes passed as attrs. If a widget isn't specified, use the
    8080        field's default widget.
    8181        """
    82         if not widget:
    83             widget = self.field.widget
     82        widget = widget or self.field.widget
    8483
    8584        if self.field.localize:
    8685            widget.is_localized = True
    … … class BoundField:  
    219218        return data
    220219
    221220    def build_widget_attrs(self, attrs, widget=None):
    222         if not widget:
    223             widget = self.field.widget
     221        widget = widget or self.field.widget
    224222        attrs = dict(attrs)  # Copy attrs to avoid modifying the argument.
    225223        if widget.use_required_attribute(self.initial) and self.field.required and self.form.use_required_attribute:
    226224            attrs['required'] = True

  • django/forms/fields.py 

    diff --git a/django/forms/fields.py b/django/forms/fields.py
    a b class FileField(Field):  
    591591        return data
    592592
    593593    def has_changed(self, initial, data):
    594         if self.disabled:
    595             return False
    596         if data is None:
    597             return False
    598         return True
     594        return not self.disabled and data is not None
    599595
    600596
    601597class ImageField(FileField):

  • django/http/request.py 

    diff --git a/django/http/request.py b/django/http/request.py
    a b class QueryDict(MultiValueDict):  
    376376
    377377    def __init__(self, query_string=None, mutable=False, encoding=None):
    378378        super().__init__()
    379         if not encoding:
    380             encoding = settings.DEFAULT_CHARSET
    381         self.encoding = encoding
     379        self.encoding = encoding = encoding or settings.DEFAULT_CHARSET
    382380        query_string = query_string or ''
    383381        parse_qsl_kwargs = {
    384382            'keep_blank_values': True,

  • django/middleware/http.py 

    diff --git a/django/middleware/http.py b/django/middleware/http.py
    a b class ConditionalGetMiddleware(MiddlewareMixin):  
    2323
    2424        etag = response.get('ETag')
    2525        last_modified = response.get('Last-Modified')
    26         if last_modified:
    27             last_modified = parse_http_date_safe(last_modified)
     26        last_modified = last_modified and parse_http_date_safe(last_modified)
    2827
    2928        if etag or last_modified:
    3029            return get_conditional_response(

  • django/test/client.py 

    diff --git a/django/test/client.py b/django/test/client.py
    a b def encode_file(boundary, key, file):  
    236236
    237237    if content_type is None:
    238238        content_type = 'application/octet-stream'
    239     if not filename:
    240         filename = key
     239    filename = filename or key
    241240    return [
    242241        to_bytes('--%s' % boundary),
    243242        to_bytes('Content-Disposition: form-data; name="%s"; filename="%s"'

  • django/test/html.py 

    diff --git a/django/test/html.py b/django/test/html.py
    a b class Element:  
    7171                    other_value = other_attr
    7272                if attr != other_attr or value != other_value:
    7373                    return False
    74         if self.children != element.children:
    75             return False
    76         return True
     74        return self.children == element.children
    7775
    7876    def __hash__(self):
    7977        return hash((self.name,) + tuple(a for a in self.attributes))

  • django/test/utils.py 

    diff --git a/django/test/utils.py b/django/test/utils.py
    a b class Approximate:  
    5050        return repr(self.val)
    5151
    5252    def __eq__(self, other):
    53         if self.val == other:
    54             return True
    55         return round(abs(self.val - other), self.places) == 0
     53        return self.val == other or round(abs(self.val - other), self.places) == 0
    5654
    5755
    5856class ContextList(list):
    … … def teardown_databases(old_config, verbosity, parallel=0, keepdb=False):  
    300298
    301299
    302300def get_runner(settings, test_runner_class=None):
    303     if not test_runner_class:
    304         test_runner_class = settings.TEST_RUNNER
    305 
     301    test_runner_class = test_runner_class or settings.TEST_RUNNER
    306302    test_path = test_runner_class.split('.')
    307303    # Allow for relative paths
    308304    if len(test_path) > 1:

  • django/urls/resolvers.py 

    diff --git a/django/urls/resolvers.py b/django/urls/resolvers.py
    a b class URLResolver:  
    393393        warnings = []
    394394        for pattern in self.url_patterns:
    395395            warnings.extend(check_resolver(pattern))
    396         if not warnings:
    397             warnings = self.pattern.check()
    398         return warnings
     396        return warnings or self.pattern.check()
    399397
    400398    def _populate(self):
    401399        # Short-circuit if called recursively in this thread to prevent

  • django/utils/cache.py 

    diff --git a/django/utils/cache.py b/django/utils/cache.py
    a b def get_conditional_response(request, etag=None, last_modified=None, response=No  
    142142    # Get HTTP request headers.
    143143    if_match_etags = parse_etags(request.META.get('HTTP_IF_MATCH', ''))
    144144    if_unmodified_since = request.META.get('HTTP_IF_UNMODIFIED_SINCE')
    145     if if_unmodified_since:
    146         if_unmodified_since = parse_http_date_safe(if_unmodified_since)
     145    if_unmodified_since = if_unmodified_since and parse_http_date_safe(if_unmodified_since)
    147146    if_none_match_etags = parse_etags(request.META.get('HTTP_IF_NONE_MATCH', ''))
    148147    if_modified_since = request.META.get('HTTP_IF_MODIFIED_SINCE')
    149     if if_modified_since:
    150         if_modified_since = parse_http_date_safe(if_modified_since)
     148    if_modified_since = if_modified_since and parse_http_date_safe(if_modified_since)
    151149
    152150    # Step 1 of section 6 of RFC 7232: Test the If-Match precondition.
    153151    if if_match_etags and not _if_match_passes(etag, if_match_etags):

  • django/utils/crypto.py 

    diff --git a/django/utils/crypto.py b/django/utils/crypto.py
    a b def pbkdf2(password, salt, iterations, dklen=0, digest=None):  
    7878    """Return the hash of password using pbkdf2."""
    7979    if digest is None:
    8080        digest = hashlib.sha256
    81     if not dklen:
    82         dklen = None
     81    dklen = dklen or None
    8382    password = force_bytes(password)
    8483    salt = force_bytes(salt)
    8584    return hashlib.pbkdf2_hmac(digest().name, password, salt, iterations, dklen)

  • django/utils/dateparse.py 

    diff --git a/django/utils/dateparse.py b/django/utils/dateparse.py
    a b def parse_time(value):  
    8989    match = time_re.match(value)
    9090    if match:
    9191        kw = match.groupdict()
    92         if kw['microsecond']:
    93             kw['microsecond'] = kw['microsecond'].ljust(6, '0')
     92        kw['microsecond'] = kw['microsecond'] and kw['microsecond'].ljust(6, '0')
    9493        kw = {k: int(v) for k, v in kw.items() if v is not None}
    9594        return datetime.time(**kw)
    9695
    … … def parse_datetime(value):  
    107106    match = datetime_re.match(value)
    108107    if match:
    109108        kw = match.groupdict()
    110         if kw['microsecond']:
    111             kw['microsecond'] = kw['microsecond'].ljust(6, '0')
     109        kw['microsecond'] = kw['microsecond'] and kw['microsecond'].ljust(6, '0')
    112110        tzinfo = kw.pop('tzinfo')
    113111        if tzinfo == 'Z':
    114112            tzinfo = utc

  • django/utils/deprecation.py 

    diff --git a/django/utils/deprecation.py b/django/utils/deprecation.py
    a b class MiddlewareMixin:  
    8888        response = None
    8989        if hasattr(self, 'process_request'):
    9090            response = self.process_request(request)
    91         if not response:
    92             response = self.get_response(request)
     91        response = response or self.get_response(request)
    9392        if hasattr(self, 'process_response'):
    9493            response = self.process_response(request, response)
    9594        return response

  • django/utils/feedgenerator.py 

    diff --git a/django/utils/feedgenerator.py b/django/utils/feedgenerator.py
    a b class SyndicationFeed:  
    8686                 feed_url=None, feed_copyright=None, feed_guid=None, ttl=None, **kwargs):
    8787        def to_str(s):
    8888            return str(s) if s is not None else s
    89         if categories:
    90             categories = [str(c) for c in categories]
     89        categories = categories and [str(c) for c in categories]
    9190        self.feed = {
    9291            'title': to_str(title),
    9392            'link': iri_to_uri(link),
    … … class SyndicationFeed:  
    117116        """
    118117        def to_str(s):
    119118            return str(s) if s is not None else s
    120         if categories:
    121             categories = [to_str(c) for c in categories]
     119        categories = categories and [to_str(c) for c in categories]
    122120        self.items.append({
    123121            'title': to_str(title),
    124122            'link': iri_to_uri(link),

  • django/utils/numberformat.py 

    diff --git a/django/utils/numberformat.py b/django/utils/numberformat.py
    a b def format(number, decimal_sep, decimal_pos=None, grouping=0, thousand_sep='',  
    4242        int_part, dec_part = str_number, ''
    4343    if decimal_pos is not None:
    4444        dec_part = dec_part + ('0' * (decimal_pos - len(dec_part)))
    45     if dec_part:
    46         dec_part = decimal_sep + dec_part
     45    dec_part = dec_part and decimal_sep + dec_part
    4746    # grouping
    4847    if use_grouping:
    4948        try:

  • django/utils/timesince.py 

    diff --git a/django/utils/timesince.py b/django/utils/timesince.py
    a b def timesince(d, now=None, reversed=False):  
    3535    if now and not isinstance(now, datetime.datetime):
    3636        now = datetime.datetime(now.year, now.month, now.day)
    3737
    38     if not now:
    39         now = datetime.datetime.now(utc if is_aware(d) else None)
     38    now = now or datetime.datetime.now(utc if is_aware(d) else None)
    4039
    4140    if reversed:
    4241        d, now = now, d

  • django/views/i18n.py 

    diff --git a/django/views/i18n.py b/django/views/i18n.py
    a b def set_language(request):  
    3535    if ((next or not request.is_ajax()) and
    3636            not is_safe_url(url=next, allowed_hosts={request.get_host()}, require_https=request.is_secure())):
    3737        next = request.META.get('HTTP_REFERER')
    38         if next:
    39             next = unquote(next)  # HTTP_REFERER may be encoded.
     38        next = next and unquote(next)  # HTTP_REFERER may be encoded.
    4039        if not is_safe_url(url=next, allowed_hosts={request.get_host()}, require_https=request.is_secure()):
    4140            next = '/'
    4241    response = HttpResponseRedirect(next) if next else HttpResponse(status=204)

  • tests/auth_tests/test_auth_backends.py 

    diff --git a/tests/auth_tests/test_auth_backends.py b/tests/auth_tests/test_auth_backends.py
    a b class SimpleRowlevelBackend:  
    339339        return False
    340340
    341341    def has_module_perms(self, user, app_label):
    342         if not user.is_anonymous and not user.is_active:
    343             return False
    344         return app_label == "app1"
     342        return (user.is_anonymous or user.is_active) and app_label == "app1"
    345343
    346344    def get_all_permissions(self, user, obj=None):
    347345        if not obj:

  • tests/fixtures/tests.py 

    diff --git a/tests/fixtures/tests.py b/tests/fixtures/tests.py
    a b class DumpDataAssertMixin:  
    5151                         natural_foreign_keys=False, natural_primary_keys=False,
    5252                         use_base_manager=False, exclude_list=[], primary_keys=''):
    5353        new_io = StringIO()
    54         if filename:
    55             filename = os.path.join(tempfile.gettempdir(), filename)
     54        filename = filename and os.path.join(tempfile.gettempdir(), filename)
    5655        management.call_command('dumpdata', *args, **{'format': format,
    5756                                                      'stdout': new_io,
    5857                                                      'stderr': new_io,

  • tests/gis_tests/test_data.py 

    diff --git a/tests/gis_tests/test_data.py b/tests/gis_tests/test_data.py
    a b class TestGeom(TestObj):  
    6262            self.coords = tuplize(coords)
    6363        if centroid:
    6464            self.centroid = tuple(centroid)
    65         if ext_ring_cs:
    66             ext_ring_cs = tuplize(ext_ring_cs)
    67         self.ext_ring_cs = ext_ring_cs
     65        self.ext_ring_cs = ext_ring_cs and tuplize(ext_ring_cs)
    6866
    6967        super().__init__(**kwargs)
    7068

  • tests/multiple_database/routers.py 

    diff --git a/tests/multiple_database/routers.py b/tests/multiple_database/routers.py
    a b class AuthRouter:  
    4343
    4444    def allow_relation(self, obj1, obj2, **hints):
    4545        "Allow any relation if a model in Auth is involved"
    46         if obj1._meta.app_label == 'auth' or obj2._meta.app_label == 'auth':
    47             return True
    48         return None
     46        return obj1._meta.app_label == 'auth' or obj2._meta.app_label == 'auth' or None
    4947
    5048    def allow_migrate(self, db, app_label, **hints):
    5149        "Make sure the auth app only appears on the 'other' db"
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