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routing: Transparently convert a MultiDict containing parameters. #724

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Improve performance of MultiDict conversion for routing

This uses a more explicit version than the more elegant comprehension to get
rid of the duplicate getlist call.
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Markus Oehme
Markus Oehme committed Apr 12, 2015
commit 868c5c8a9b51c64ca60911c0c024bc786f45437c
@@ -109,7 +109,7 @@
from werkzeug._internal import _get_environ, _encode_idna
from werkzeug._compat import itervalues, iteritems, to_unicode, to_bytes, \
text_type, string_types, native_string_result, \
implements_to_string, wsgi_decoding_dance
implements_to_string, wsgi_decoding_dance, iterlists
from werkzeug.datastructures import ImmutableDict, MultiDict


@@ -1748,11 +1748,12 @@ def build(self, endpoint, values=None, method=None, force_external=False,
self.map.update()
if values:
if isinstance(values, MultiDict):
temp = dict(
(k, (values.getlist(k)
if len(values.getlist(k)) > 1
else values[k]))
for k in values)
temp = {}
for key, list_value in iterlists(values):
if len(list_value) == 1:
temp[key] = list_value[0]
else:
temp[key] = list_value
else:
temp = values
values = dict((k, v) for k, v in iteritems(temp) if v is not None)
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