def _populate(self):
lookups = MultiValueDict()
namespaces = {}
apps = {}
language_code = get_language()
for pattern in reversed(self.url_patterns):
p_pattern = pattern.regex.pattern
if p_pattern.startswith('^'):
p_pattern = p_pattern[1:]
if isinstance(pattern, RegexURLResolver):
if pattern.namespace:
namespaces[pattern.namespace] = (p_pattern, pattern)
if pattern.app_name:
apps.setdefault(pattern.app_name, []).append(pattern.namespace)
else:
parent = normalize(pattern.regex.pattern)
for name in pattern.reverse_dict:
for matches, pat, defaults in pattern.reverse_dict.getlist(name):
new_matches = []
for piece, p_args in parent:
new_matches.extend([(piece + suffix, p_args + args) for (suffix, args) in matches])
lookups.appendlist(name, (new_matches, p_pattern + pat, dict(defaults, **pattern.default_kwargs)))
for namespace, (prefix, sub_pattern) in pattern.namespace_dict.items():
namespaces[namespace] = (p_pattern + prefix, sub_pattern)
for app_name, namespace_list in pattern.app_dict.items():
apps.setdefault(app_name, []).extend(namespace_list)
else:
bits = normalize(p_pattern)
lookups.appendlist(pattern.callback, (bits, p_pattern, pattern.default_args))
if pattern.name is not None:
lookups.appendlist(pattern.name, (bits, p_pattern, pattern.default_args))
self._reverse_dict[language_code] = lookups
self._namespace_dict[language_code] = namespaces
self._app_dict[language_code] = apps
def _reverse_with_prefix(self, lookup_view, _prefix, *args, **kwargs):
if args and kwargs:
raise ValueError("Don't mix *args and **kwargs in call to reverse()!")
try:
lookup_view = get_callable(lookup_view, True)
except (ImportError, AttributeError) as e:
raise NoReverseMatch("Error importing '%s': %s." % (lookup_view, e))
possibilities = self.reverse_dict.getlist(lookup_view)
prefix_norm, prefix_args = normalize(_prefix)[0]
for possibility, pattern, defaults in possibilities:
for result, params in possibility:
if args:
if len(args) != len(params) + len(prefix_args):
continue
unicode_args = [force_text(val) for val in args]
candidate = (prefix_norm + result) % dict(zip(prefix_args + params, unicode_args))
else:
if set(kwargs.keys()) | set(defaults.keys()) != set(params) | set(defaults.keys()) | set(prefix_args):
continue
matches = True
for k, v in defaults.items():
if kwargs.get(k, v) != v:
matches = False
break
if not matches:
continue
unicode_kwargs = dict([(k, force_text(v)) for (k, v) in kwargs.items()])
candidate = (prefix_norm + result) % unicode_kwargs
if re.search('^%s%s' % (_prefix, pattern), candidate, re.UNICODE):
return candidate
# lookup_view can be URL label, or dotted path, or callable, Any of
# these can be passed in at the top, but callables are not friendly in
# error messages.
m = getattr(lookup_view, '__module__', None)
n = getattr(lookup_view, '__name__', None)
if m is not None and n is not None:
lookup_view_s = "%s.%s" % (m, n)
else:
lookup_view_s = lookup_view
raise NoReverseMatch("Reverse for '%s' with arguments '%s' and keyword "
"arguments '%s' not found." % (lookup_view_s, args, kwargs))
def test_group_backreference(self):
pattern = r"(?P<first_group_name>.*)-(?P=first_group_name)"
expected = [('%(first_group_name)s-%(first_group_name)s',
['first_group_name'])]
result = regex_helper.normalize(pattern)
self.assertEqual(result, expected)
def test_empty(self):
pattern = r""
expected = [('', [])]
result = regex_helper.normalize(pattern)
self.assertEqual(result, expected)
def test_group_named(self):
pattern = r"(?P<first_group_name>.*)-(?P<second_group_name>.*)"
expected = [('%(first_group_name)s-%(second_group_name)s',
['first_group_name', 'second_group_name'])]
result = regex_helper.normalize(pattern)
self.assertEqual(result, expected)
def test_group_noncapturing(self):
pattern = r"(?:non-capturing)"
expected = [('non-capturing', [])]
result = regex_helper.normalize(pattern)
self.assertEqual(result, expected)
def test_group_ignored(self):
pattern = r"(?i)(?L)(?m)(?s)(?u)(?#)"
expected = [('', [])]
result = regex_helper.normalize(pattern)
self.assertEqual(result, expected)
def test_group_positional(self):
pattern = r"(.*)-(.+)"
expected = [('%(_0)s-%(_1)s', ['_0', '_1'])]
result = regex_helper.normalize(pattern)
self.assertEqual(result, expected)
def test_escape(self):
pattern = r"\\\^\$\.\|\?\*\+\(\)\["
expected = [('\\^$.|?*+()[', [])]
result = regex_helper.normalize(pattern)
self.assertEqual(result, expected)
