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faster first time parse generator

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* Generating the set of valid unicode characters is expensive in terms
of memory storage. Instead, we define the grammer by the negation of
allowed unicode characters. Much faster.
This commit is contained in:
Chris Meyers 2017-04-03 12:43:27 -04:00
parent a8213661fd
commit 6cbdb8d0e6
2 changed files with 14 additions and 10 deletions
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14
awx/main/fields.py
View File

@ -4,7 +4,8 @@
# Python
import json
import re
from pyparsing import infixNotation, opAssoc, Word, Optional, Literal
import sys
from pyparsing import infixNotation, opAssoc, Word, Optional, Literal, CharsNotIn
# Django
from django.db.models.signals import (
@ -298,11 +299,8 @@ class ImplicitRoleField(models.ForeignKey):
Role.rebuild_role_ancestor_list([], child_ids)
unicode_printables = u''.join(unichr(c) for c in xrange(65536) if not unichr(c).isspace())
unicode_printables += u'.'
unicode_printables_spaces = u''.join(unichr(c) for c in xrange(65536))
unicode_spaces = [unichr(c) for c in xrange(sys.maxunicode) if unichr(c).isspace()]
unicode_spaces_other = unicode_spaces + [u'(', u')', u'=', u'"']
def string_to_type(t):
if t == 'true':
@ -461,8 +459,8 @@ class DynamicFilterField(models.TextField):
* handle optional value quoted: a.b.c=""
'''
atom = Word(unicode_printables, excludeChars=['(', ')', '=', '"'])
atom_inside_quotes = Word(unicode_printables_spaces, excludeChars=['"'])
atom = CharsNotIn(unicode_spaces_other)
atom_inside_quotes = CharsNotIn(u'"')
atom_quoted = Literal('"') + Optional(atom_inside_quotes) + Literal('"')
EQUAL = Literal('=')

10
awx/main/tests/unit/test_fields.py
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@ -32,10 +32,16 @@ class TestDynamicFilterFieldFilterStringToQ():
'a__b__c__ space =ggg',
])
def test_invalid_filter_strings(self, filter_string):
with pytest.raises(ParseException):
DynamicFilterField.filter_string_to_q(filter_string)
@pytest.mark.parametrize("filter_string,q_expected", [
(u'(a=abc\u1F5E3def)', Q(**{u"a": u"abc\u1F5E3def"})),
])
def test_unicode(self, filter_string, q_expected):
q = DynamicFilterField.filter_string_to_q(filter_string)
assert str(q) == str(q_expected)
@pytest.mark.parametrize("filter_string,q_expected", [
('(a=b)', Q(**{"a": "b"})),
('a=b and c=d', Q(**{"a": "b"}) & Q(**{"c": "d"})),