def formfield(self, **kwargs):
db = kwargs.pop('using', None)
if isinstance(self.remote_field.model, six.string_types):
raise ValueError("Cannot create form field for %r yet, because "
"its related model %r has not been loaded yet" %
(self.name, self.remote_field.model))
defaults = {
'form_class': forms.ModelChoiceField,
'queryset': self.remote_field.model._default_manager.using(db),
'to_field_name': self.remote_field.field_name,
}
defaults.update(kwargs)
return super(ForeignKey, self).formfield(**defaults)
python类string_types()的实例源码
def test_chart_view_get(self):
ChartViewSubClass = type('ChartViewSubClass', (ChartView, ), {
'chart_instance': LineChart()
})
chart_view = ChartViewSubClass()
request_factory = RequestFactory()
request = request_factory.get('/test-url')
response = chart_view.get(request)
self.assertEquals(response.status_code, 200)
charset = getattr(response, 'charset', 'utf-8')
content = response.content.decode(charset)
data = json.loads(content)
self.assertIn('data', data)
self.assertIn('options', data)
self.assertIn('type', data)
self.assertTrue(isinstance(data['data'], dict))
self.assertTrue(isinstance(data['options'], dict))
self.assertTrue(isinstance(data['type'], (six.string_types, six.text_type)))
self.assertIn(data['type'], ['bar', 'line', 'radar', 'polarArea', 'pie', 'bubble'])
self.assertIn('title', data['options'])
def test_chart_view_get(self):
ChartViewSubClass = type('ChartViewSubClass', (ChartView, ), {
'chart_instance': LineChart()
})
chart_view = ChartViewSubClass()
request_factory = RequestFactory()
request = request_factory.get('/test-url')
response = chart_view.get(request)
self.assertEquals(response.status_code, 200)
charset = getattr(response, 'charset', 'utf-8')
content = response.content.decode(charset)
data = json.loads(content)
self.assertIn('data', data)
self.assertIn('options', data)
self.assertIn('type', data)
self.assertTrue(isinstance(data['data'], dict))
self.assertTrue(isinstance(data['options'], dict))
self.assertTrue(isinstance(data['type'], (six.string_types, six.text_type)))
self.assertIn(data['type'], ['bar', 'line', 'radar', 'polarArea', 'pie', 'bubble'])
self.assertIn('title', data['options'])
def prepare_value(self, value):
"""Converts value to string for widget usage"""
if not isinstance(value, six.string_types):
value = value or ()
value = self.collection_type(
self.item_type(item) for item in value
)
if isinstance(value, set) or not self.unique_items:
collection = value
else:
collection = []
# Remove the duplicates while keeping order:
[
collection.append(item)
for item in value if item not in collection
]
if self.sort:
collection = sorted(collection)
value = self.format_separator().join(
six.text_type(item) for item in collection
)
return value
def get_model_label(model):
"""
Take a model class or model label and return its model label.
>>> get_model_label(MyModel)
"myapp.MyModel"
>>> get_model_label("myapp.MyModel")
"myapp.MyModel"
"""
if isinstance(model, six.string_types):
return model
else:
return "%s.%s" % (
model._meta.app_label,
model.__name__
)
def load_object(import_path):
"""
Loads an object from an 'import_path', like in MIDDLEWARE_CLASSES and the
likes.
Import paths should be: "mypackage.mymodule.MyObject". It then imports the
module up until the last dot and tries to get the attribute after that dot
from the imported module.
If the import path does not contain any dots, a TypeError is raised.
If the module cannot be imported, an ImportError is raised.
If the attribute does not exist in the module, a AttributeError is raised.
"""
if not isinstance(import_path, six.string_types):
return import_path
if '.' not in import_path:
raise TypeError(
"'import_path' argument to 'django_load.core.load_object' must "
"contain at least one dot.")
module_name, object_name = import_path.rsplit('.', 1)
module = import_module(module_name)
return getattr(module, object_name)
def make_models(self, model_def, app_name):
if not isinstance(model_def, string_types):
model = self.make_model(model_def, app_name)
return [model] if model else []
match = self.MULTIPLE_MODELS_RE.match(model_def)
if not match:
model = self.make_model(model_def, app_name)
return [model] if model else []
prefix = match.group(1)
prefix = self.get_model_name(app_name,prefix)
return [
m
for m in [
self.convert_native_model(native_model,app_name)
for native_model in self.all_models
if self.get_native_model_name(native_model).startswith(prefix)
]
if m
]
def Deserializer(stream_or_string, **options):
"""
Deserialize a stream or string of JSON data.
"""
if not isinstance(stream_or_string, (bytes, six.string_types)):
stream_or_string = stream_or_string.read()
if isinstance(stream_or_string, bytes):
stream_or_string = stream_or_string.decode('utf-8')
try:
objects = json.loads(stream_or_string)
for obj in PythonDeserializer(objects, **options):
yield obj
except GeneratorExit:
raise
except Exception as e:
# Map to deserializer error
six.reraise(DeserializationError, DeserializationError(e), sys.exc_info()[2])
def Deserializer(stream_or_string, **options):
"""
Deserialize a stream or string of YAML data.
"""
if isinstance(stream_or_string, bytes):
stream_or_string = stream_or_string.decode('utf-8')
if isinstance(stream_or_string, six.string_types):
stream = StringIO(stream_or_string)
else:
stream = stream_or_string
try:
for obj in PythonDeserializer(yaml.load(stream, Loader=SafeLoader), **options):
yield obj
except GeneratorExit:
raise
except Exception as e:
# Map to deserializer error
six.reraise(DeserializationError, DeserializationError(e), sys.exc_info()[2])
def regex(self):
"""
Returns a compiled regular expression, depending upon the activated
language-code.
"""
language_code = get_language()
if language_code not in self._regex_dict:
if isinstance(self._regex, six.string_types):
regex = self._regex
else:
regex = force_text(self._regex)
try:
compiled_regex = re.compile(regex, re.UNICODE)
except re.error as e:
raise ImproperlyConfigured(
'"%s" is not a valid regular expression: %s' %
(regex, six.text_type(e)))
self._regex_dict[language_code] = compiled_regex
return self._regex_dict[language_code]
def permission_required(perm, login_url=None, raise_exception=False):
"""
Decorator for views that checks whether a user has a particular permission
enabled, redirecting to the log-in page if necessary.
If the raise_exception parameter is given the PermissionDenied exception
is raised.
"""
def check_perms(user):
if isinstance(perm, six.string_types):
perms = (perm, )
else:
perms = perm
# First check if the user has the permission (even anon users)
if user.has_perms(perms):
return True
# In case the 403 handler should be called raise the exception
if raise_exception:
raise PermissionDenied
# As the last resort, show the login form
return False
return user_passes_test(check_perms, login_url=login_url)
def _check_query(self, query, country=False, city=False, city_or_country=False):
"Helper routine for checking the query and database availability."
# Making sure a string was passed in for the query.
if not isinstance(query, six.string_types):
raise TypeError('GeoIP query must be a string, not type %s' % type(query).__name__)
# Extra checks for the existence of country and city databases.
if city_or_country and not (self._country or self._city):
raise GeoIPException('Invalid GeoIP country and city data files.')
elif country and not self._country:
raise GeoIPException('Invalid GeoIP country data file: %s' % self._country_file)
elif city and not self._city:
raise GeoIPException('Invalid GeoIP city data file: %s' % self._city_file)
# Return the query string back to the caller. GeoIP only takes bytestrings.
return force_bytes(query)
def check_srs(self, source_srs):
"Checks the compatibility of the given spatial reference object."
if isinstance(source_srs, SpatialReference):
sr = source_srs
elif isinstance(source_srs, self.spatial_backend.spatial_ref_sys()):
sr = source_srs.srs
elif isinstance(source_srs, (int, six.string_types)):
sr = SpatialReference(source_srs)
else:
# Otherwise just pulling the SpatialReference from the layer
sr = self.layer.srs
if not sr:
raise LayerMapError('No source reference system defined.')
else:
return sr
def __init__(self, type_input):
"Figures out the correct OGR Type based upon the input."
if isinstance(type_input, OGRGeomType):
num = type_input.num
elif isinstance(type_input, six.string_types):
type_input = type_input.lower()
if type_input == 'geometry':
type_input = 'unknown'
num = self._str_types.get(type_input)
if num is None:
raise GDALException('Invalid OGR String Type "%s"' % type_input)
elif isinstance(type_input, int):
if type_input not in self._types:
raise GDALException('Invalid OGR Integer Type: %d' % type_input)
num = type_input
else:
raise TypeError('Invalid OGR input type given.')
# Setting the OGR geometry type number.
self.num = num
def database_forwards(self, app_label, schema_editor, from_state, to_state):
to_model = to_state.apps.get_model(app_label, self.model_name)
if self.allow_migrate_model(schema_editor.connection.alias, to_model):
from_model = from_state.apps.get_model(app_label, self.model_name)
from_field = from_model._meta.get_field(self.name)
to_field = to_model._meta.get_field(self.name)
# If the field is a relatedfield with an unresolved rel.to, just
# set it equal to the other field side. Bandaid fix for AlterField
# migrations that are part of a RenameModel change.
if from_field.remote_field and from_field.remote_field.model:
if isinstance(from_field.remote_field.model, six.string_types):
from_field.remote_field.model = to_field.remote_field.model
elif to_field.remote_field and isinstance(to_field.remote_field.model, six.string_types):
to_field.remote_field.model = from_field.remote_field.model
if not self.preserve_default:
to_field.default = self.field.default
schema_editor.alter_field(from_model, from_field, to_field)
if not self.preserve_default:
to_field.default = NOT_PROVIDED
def references_model(self, name, app_label=None):
strings_to_check = [self.name]
# Check we didn't inherit from the model
for base in self.bases:
if isinstance(base, six.string_types):
strings_to_check.append(base.split(".")[-1])
# Check we have no FKs/M2Ms with it
for fname, field in self.fields:
if field.remote_field:
if isinstance(field.remote_field.model, six.string_types):
strings_to_check.append(field.remote_field.model.split(".")[-1])
# Now go over all the strings and compare them
for string in strings_to_check:
if string.lower() == name.lower():
return True
return False
def connect(self, receiver, sender=None, weak=True, dispatch_uid=None):
if isinstance(sender, six.string_types):
try:
app_label, model_name = sender.split('.')
except ValueError:
raise ValueError(
"Specified sender must either be a model or a "
"model name of the 'app_label.ModelName' form."
)
try:
sender = apps.get_registered_model(app_label, model_name)
except LookupError:
ref = (app_label, model_name)
refs = self.unresolved_references.setdefault(ref, [])
refs.append((receiver, weak, dispatch_uid))
return
super(ModelSignal, self).connect(
receiver, sender=sender, weak=weak, dispatch_uid=dispatch_uid
)
def _check_referencing_to_swapped_model(self):
if (self.remote_field.model not in self.opts.apps.get_models() and
not isinstance(self.remote_field.model, six.string_types) and
self.remote_field.model._meta.swapped):
model = "%s.%s" % (
self.remote_field.model._meta.app_label,
self.remote_field.model._meta.object_name
)
return [
checks.Error(
("Field defines a relation with the model '%s', "
"which has been swapped out.") % model,
hint="Update the relation to point at 'settings.%s'." % self.remote_field.model._meta.swappable,
obj=self,
id='fields.E301',
)
]
return []
def find_template_loader(self, loader):
if isinstance(loader, (tuple, list)):
args = list(loader[1:])
loader = loader[0]
else:
args = []
if isinstance(loader, six.string_types):
loader_class = import_string(loader)
if getattr(loader_class, '_accepts_engine_in_init', False):
args.insert(0, self)
else:
warnings.warn(
"%s inherits from django.template.loader.BaseLoader "
"instead of django.template.loaders.base.Loader. " %
loader, RemovedInDjango110Warning, stacklevel=2)
return loader_class(*args)
else:
raise ImproperlyConfigured(
"Invalid value in template loaders configuration: %r" % loader)
def assertJSONEqual(self, raw, expected_data, msg=None):
"""
Asserts that the JSON fragments raw and expected_data are equal.
Usual JSON non-significant whitespace rules apply as the heavyweight
is delegated to the json library.
"""
try:
data = json.loads(raw)
except ValueError:
self.fail("First argument is not valid JSON: %r" % raw)
if isinstance(expected_data, six.string_types):
try:
expected_data = json.loads(expected_data)
except ValueError:
self.fail("Second argument is not valid JSON: %r" % expected_data)
self.assertEqual(data, expected_data, msg=msg)
def assertJSONNotEqual(self, raw, expected_data, msg=None):
"""
Asserts that the JSON fragments raw and expected_data are not equal.
Usual JSON non-significant whitespace rules apply as the heavyweight
is delegated to the json library.
"""
try:
data = json.loads(raw)
except ValueError:
self.fail("First argument is not valid JSON: %r" % raw)
if isinstance(expected_data, six.string_types):
try:
expected_data = json.loads(expected_data)
except ValueError:
self.fail("Second argument is not valid JSON: %r" % expected_data)
self.assertNotEqual(data, expected_data, msg=msg)
def enable(self):
self.options = {}
for name, operations in self.operations:
try:
# When called from SimpleTestCase.setUpClass, values may be
# overridden several times; cumulate changes.
value = self.options[name]
except KeyError:
value = list(getattr(settings, name, []))
for action, items in operations.items():
# items my be a single value or an iterable.
if isinstance(items, six.string_types):
items = [items]
if action == 'append':
value = value + [item for item in items if item not in value]
elif action == 'prepend':
value = [item for item in items if item not in value] + value
elif action == 'remove':
value = [item for item in value if item not in items]
else:
raise ValueError("Unsupported action: %s" % action)
self.options[name] = value
super(modify_settings, self).enable()
def append(self, element):
if isinstance(element, six.string_types):
element = force_text(element)
element = normalize_whitespace(element)
if self.children:
if isinstance(self.children[-1], six.string_types):
self.children[-1] += element
self.children[-1] = normalize_whitespace(self.children[-1])
return
elif self.children:
# removing last children if it is only whitespace
# this can result in incorrect dom representations since
# whitespace between inline tags like <span> is significant
if isinstance(self.children[-1], six.string_types):
if self.children[-1].isspace():
self.children.pop()
if element:
self.children.append(element)
def finalize(self):
def rstrip_last_element(children):
if children:
if isinstance(children[-1], six.string_types):
children[-1] = children[-1].rstrip()
if not children[-1]:
children.pop()
children = rstrip_last_element(children)
return children
rstrip_last_element(self.children)
for i, child in enumerate(self.children):
if isinstance(child, six.string_types):
self.children[i] = child.strip()
elif hasattr(child, 'finalize'):
child.finalize()
def _count(self, element, count=True):
if not isinstance(element, six.string_types):
if self == element:
return 1
i = 0
for child in self.children:
# child is text content and element is also text content, then
# make a simple "text" in "text"
if isinstance(child, six.string_types):
if isinstance(element, six.string_types):
if count:
i += child.count(element)
elif element in child:
return 1
else:
i += child._count(element, count=count)
if not count and i:
return i
return i
def parse_html(html):
"""
Takes a string that contains *valid* HTML and turns it into a Python object
structure that can be easily compared against other HTML on semantic
equivalence. Syntactical differences like which quotation is used on
arguments will be ignored.
"""
parser = Parser()
parser.feed(html)
parser.close()
document = parser.root
document.finalize()
# Removing ROOT element if it's not necessary
if len(document.children) == 1:
if not isinstance(document.children[0], six.string_types):
document = document.children[0]
return document
def sanitize_separators(value):
"""
Sanitizes a value according to the current decimal and
thousand separator setting. Used with form field input.
"""
if settings.USE_L10N and isinstance(value, six.string_types):
parts = []
decimal_separator = get_format('DECIMAL_SEPARATOR')
if decimal_separator in value:
value, decimals = value.split(decimal_separator, 1)
parts.append(decimals)
if settings.USE_THOUSAND_SEPARATOR:
thousand_sep = get_format('THOUSAND_SEPARATOR')
if thousand_sep == '.' and value.count('.') == 1 and len(value.split('.')[-1]) != 3:
# Special case where we suspect a dot meant decimal separator (see #22171)
pass
else:
for replacement in {
thousand_sep, unicodedata.normalize('NFKD', thousand_sep)}:
value = value.replace(replacement, '')
parts.append(value)
value = '.'.join(reversed(parts))
return value
def _archive_cls(file):
cls = None
if isinstance(file, six.string_types):
filename = file
else:
try:
filename = file.name
except AttributeError:
raise UnrecognizedArchiveFormat(
"File object not a recognized archive format.")
base, tail_ext = os.path.splitext(filename.lower())
cls = extension_map.get(tail_ext)
if not cls:
base, ext = os.path.splitext(base)
cls = extension_map.get(ext)
if not cls:
raise UnrecognizedArchiveFormat(
"Path not a recognized archive format: %s" % filename)
return cls
def get_formats():
"""
Returns all formats strings required for i18n to work
"""
FORMAT_SETTINGS = (
'DATE_FORMAT', 'DATETIME_FORMAT', 'TIME_FORMAT',
'YEAR_MONTH_FORMAT', 'MONTH_DAY_FORMAT', 'SHORT_DATE_FORMAT',
'SHORT_DATETIME_FORMAT', 'FIRST_DAY_OF_WEEK', 'DECIMAL_SEPARATOR',
'THOUSAND_SEPARATOR', 'NUMBER_GROUPING',
'DATE_INPUT_FORMATS', 'TIME_INPUT_FORMATS', 'DATETIME_INPUT_FORMATS'
)
result = {}
for module in [settings] + get_format_modules(reverse=True):
for attr in FORMAT_SETTINGS:
result[attr] = get_format(attr)
formats = {}
for k, v in result.items():
if isinstance(v, (six.string_types, int)):
formats[k] = smart_text(v)
elif isinstance(v, (tuple, list)):
formats[k] = [smart_text(value) for value in v]
return formats
def i18n_patterns(prefix, *args):
"""
Adds the language code prefix to every URL pattern within this
function. This may only be used in the root URLconf, not in an included
URLconf.
"""
if isinstance(prefix, six.string_types):
warnings.warn(
"Calling i18n_patterns() with the `prefix` argument and with tuples "
"instead of django.conf.urls.url() instances is deprecated and "
"will no longer work in Django 1.10. Use a list of "
"django.conf.urls.url() instances instead.",
RemovedInDjango110Warning, stacklevel=2
)
pattern_list = patterns(prefix, *args)
else:
pattern_list = [prefix] + list(args)
if not settings.USE_I18N:
return pattern_list
return [LocaleRegexURLResolver(pattern_list)]
