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Moved bilateral transform fetching to models.lookups

This commit is contained in:
Anssi Kääriäinen 2014-11-15 13:04:02 +02:00 committed by Tim Graham
parent 524e71c9c2
commit 4252a14c39
2 changed files with 17 additions and 9 deletions
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15
django/db/models/lookups.py
View File

@ -78,14 +78,25 @@ class Transform(RegisterLookupMixin):
def get_group_by_cols(self):
return self.lhs.get_group_by_cols()
def get_bilateral_transforms(self):
if hasattr(self.lhs, 'get_bilateral_transforms'):
bilateral_transforms = self.lhs.get_bilateral_transforms()
else:
bilateral_transforms = []
if self.bilateral:
bilateral_transforms.append((self.__class__, self.init_lookups))
return bilateral_transforms
class Lookup(RegisterLookupMixin):
lookup_name = None
def __init__(self, lhs, rhs, bilateral_transforms=None):
def __init__(self, lhs, rhs):
self.lhs, self.rhs = lhs, rhs
self.rhs = self.get_prep_lookup()
if bilateral_transforms is None:
if hasattr(self.lhs, 'get_bilateral_transforms'):
bilateral_transforms = self.lhs.get_bilateral_transforms()
else:
bilateral_transforms = []
if bilateral_transforms:
# We should warn the user as soon as possible if he is trying to apply

11
django/db/models/sql/query.py
View File

@ -1077,7 +1077,6 @@ class Query(object):
and get_transform().
"""
lookups = lookups[:]
bilaterals = []
while lookups:
name = lookups[0]
# If there is just one part left, try first get_lookup() so
@ -1089,21 +1088,19 @@ class Query(object):
# We didn't find a lookup. We are going to interpret
# the name as transform, and do an Exact lookup against
# it.
lhs = self.try_transform(lhs, name, lookups, bilaterals)
lhs = self.try_transform(lhs, name, lookups)
final_lookup = lhs.get_lookup('exact')
return final_lookup(lhs, rhs, bilaterals)
lhs = self.try_transform(lhs, name, lookups, bilaterals)
return final_lookup(lhs, rhs)
lhs = self.try_transform(lhs, name, lookups)
lookups = lookups[1:]
def try_transform(self, lhs, name, rest_of_lookups, bilaterals):
def try_transform(self, lhs, name, rest_of_lookups):
"""
Helper method for build_lookup. Tries to fetch and initialize
a transform for name parameter from lhs.
"""
next = lhs.get_transform(name)
if next:
if getattr(next, 'bilateral', False):
bilaterals.append((next, rest_of_lookups))
return next(lhs, rest_of_lookups)
else:
raise FieldError(