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Made Extracts aware of full lookup path

This commit is contained in:
Anssi Kääriäinen 2013-12-21 22:47:23 +02:00
parent 27a57b7aed
commit ed8fab7fe8
2 changed files with 11 additions and 9 deletions
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3
django/db/models/lookups.py
View File

@ -6,8 +6,9 @@ from django.utils.functional import cached_property
class Extract(object): class Extract(object):
def __init__(self, lhs): def __init__(self, lhs, lookups):
self.lhs = lhs self.lhs = lhs
self.init_lookups = lookups[:]
def get_lookup(self, lookup): def get_lookup(self, lookup):
return self.output_type.get_lookup(lookup) return self.output_type.get_lookup(lookup)

15
django/db/models/sql/query.py
View File

@ -1082,26 +1082,27 @@ class Query(object):
def build_lookup(self, lookups, lhs, rhs): def build_lookup(self, lookups, lhs, rhs):
lookups = lookups[:] lookups = lookups[:]
lookups.reverse()
while lookups: while lookups:
lookup = lookups.pop() lookup = lookups[0]
next = lhs.get_lookup(lookup) next = lhs.get_lookup(lookup)
if next: if next:
if not lookups: if len(lookups) == 1:
# This was the last lookup, so return value lookup. # This was the last lookup, so return value lookup.
if issubclass(next, Extract): if issubclass(next, Extract):
lhs = next(lhs) lookups.append('exact')
next = lhs.get_lookup('exact') lhs = next(lhs, lookups)
else:
return next(lhs, rhs) return next(lhs, rhs)
else: else:
lhs = next(lhs) lhs = next(lhs, lookups)
# A field's get_lookup() can return None to opt for backwards # A field's get_lookup() can return None to opt for backwards
# compatibility path. # compatibility path.
elif len(lookups) > 1: elif len(lookups) > 2:
raise FieldError( raise FieldError(
"Unsupported lookup for field '%s'" % lhs.output_type.name) "Unsupported lookup for field '%s'" % lhs.output_type.name)
else: else:
return None return None
lookups = lookups[1:]
def build_filter(self, filter_expr, branch_negated=False, current_negated=False, def build_filter(self, filter_expr, branch_negated=False, current_negated=False,
can_reuse=None, connector=AND): can_reuse=None, connector=AND):