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Code Issues 32 Releases Wiki Activity

Fixed #1142 -- Added multiple database support.

Browse Source 
This monster of a patch is the result of Alex Gaynor's 2009 Google Summer of Code project.
Congratulations to Alex for a job well done.

Big thanks also go to:
 * Justin Bronn for keeping GIS in line with the changes,
 * Karen Tracey and Jani Tiainen for their help testing Oracle support
 * Brett Hoerner, Jon Loyens, and Craig Kimmerer for their feedback.
 * Malcolm Treddinick for his guidance during the GSoC submission process.
 * Simon Willison for driving the original design process
 * Cal Henderson for complaining about ponies he wanted.

... and everyone else too numerous to mention that helped to bring this feature into fruition.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@11952 bcc190cf-cafb-0310-a4f2-bffc1f526a37
This commit is contained in:
Russell Keith-Magee
2009-12-22 15:18:51 +00:00
parent 7ef212af14
commit ff60c5f9de
231 changed files with 7860 additions and 5668 deletions
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21
tests/regressiontests/queries/models.py
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@@ -7,7 +7,7 @@ import pickle
import sys
from django.conf import settings
from django.db import models
from django.db import models, DEFAULT_DB_ALIAS
from django.db.models.query import Q, ITER_CHUNK_SIZE
# Python 2.3 doesn't have sorted()
@@ -822,8 +822,8 @@ We can do slicing beyond what is currently in the result cache, too.
Bug #7045 -- extra tables used to crash SQL construction on the second use.
>>> qs = Ranking.objects.extra(tables=['django_site'])
>>> s = qs.query.as_sql()
>>> s = qs.query.as_sql() # test passes if this doesn't raise an exception.
>>> s = qs.query.get_compiler(qs.db).as_sql()
>>> s = qs.query.get_compiler(qs.db).as_sql() # test passes if this doesn't raise an exception.
Bug #7098 -- Make sure semi-deprecated ordering by related models syntax still
works.
@@ -912,9 +912,9 @@ We should also be able to pickle things that use select_related(). The only
tricky thing here is to ensure that we do the related selections properly after
unpickling.
>>> qs = Item.objects.select_related()
>>> query = qs.query.as_sql()[0]
>>> query = qs.query.get_compiler(qs.db).as_sql()[0]
>>> query2 = pickle.loads(pickle.dumps(qs.query))
>>> query2.as_sql()[0] == query
>>> query2.get_compiler(qs.db).as_sql()[0] == query
True
Check pickling of deferred-loading querysets
@@ -1051,7 +1051,7 @@ sufficient that this query runs without error.
Calling order_by() with no parameters removes any existing ordering on the
model. But it should still be possible to add new ordering after that.
>>> qs = Author.objects.order_by().order_by('name')
>>> 'ORDER BY' in qs.query.as_sql()[0]
>>> 'ORDER BY' in qs.query.get_compiler(qs.db).as_sql()[0]
True
Incorrect SQL was being generated for certain types of exclude() queries that
@@ -1085,7 +1085,8 @@ performance problems on backends like MySQL.
Nested queries should not evaluate the inner query as part of constructing the
SQL (so we should see a nested query here, indicated by two "SELECT" calls).
>>> Annotation.objects.filter(notes__in=Note.objects.filter(note="xyzzy")).query.as_sql()[0].count('SELECT')
>>> qs = Annotation.objects.filter(notes__in=Note.objects.filter(note="xyzzy"))
>>> qs.query.get_compiler(qs.db).as_sql()[0].count('SELECT')
2
Bug #10181 -- Avoid raising an EmptyResultSet if an inner query is provably
@@ -1222,20 +1223,20 @@ FieldError: Infinite loop caused by ordering.
# In Oracle, we expect a null CharField to return u'' instead of None.
if settings.DATABASE_ENGINE == "oracle":
if settings.DATABASES[DEFAULT_DB_ALIAS]['ENGINE'] == "django.db.backends.oracle":
__test__["API_TESTS"] = __test__["API_TESTS"].replace("<NONE_OR_EMPTY_UNICODE>", "u''")
else:
__test__["API_TESTS"] = __test__["API_TESTS"].replace("<NONE_OR_EMPTY_UNICODE>", "None")
if settings.DATABASE_ENGINE == "mysql":
if settings.DATABASES[DEFAULT_DB_ALIAS]['ENGINE'] == "django.db.backends.mysql":
__test__["API_TESTS"] += """
When grouping without specifying ordering, we add an explicit "ORDER BY NULL"
portion in MySQL to prevent unnecessary sorting.
>>> query = Tag.objects.values_list('parent_id', flat=True).order_by().query
>>> query.group_by = ['parent_id']
>>> sql = query.as_sql()[0]
>>> sql = query.get_compiler(DEFAULT_DB_ALIAS).as_sql()[0]
>>> fragment = "ORDER BY "
>>> pos = sql.find(fragment)
>>> sql.find(fragment, pos + 1) == -1