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Code Issues 32 Releases Wiki Activity

Fixed #3790 -- Fixed a problem with sequence resetting during fixture loads when using Postgres. Thanks to Jon Ballard and scott@staplefish.com for the report, and to Zach Thompson for suggesting a solution.

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git-svn-id: http://code.djangoproject.com/svn/django/trunk@4937 bcc190cf-cafb-0310-a4f2-bffc1f526a37
This commit is contained in:
Russell Keith-Magee
2007-04-06 02:25:58 +00:00
parent e339a41222
commit dabd96646c
14 changed files with 121 additions and 26 deletions
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38
django/core/management.py
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@@ -410,30 +410,10 @@ get_sql_initial_data.help_doc = "RENAMED: see 'sqlcustom'"
get_sql_initial_data.args = ''
def get_sql_sequence_reset(app):
"Returns a list of the SQL statements to reset PostgreSQL sequences for the given app."
"Returns a list of the SQL statements to reset sequences for the given app."
from django.db import backend, models
output = []
for model in models.get_models(app):
for f in model._meta.fields:
if isinstance(f, models.AutoField):
output.append("%s setval('%s', (%s max(%s) %s %s));" % \
(style.SQL_KEYWORD('SELECT'),
style.SQL_FIELD('%s_%s_seq' % (model._meta.db_table, f.column)),
style.SQL_KEYWORD('SELECT'),
style.SQL_FIELD(backend.quote_name(f.column)),
style.SQL_KEYWORD('FROM'),
style.SQL_TABLE(backend.quote_name(model._meta.db_table))))
break # Only one AutoField is allowed per model, so don't bother continuing.
for f in model._meta.many_to_many:
output.append("%s setval('%s', (%s max(%s) %s %s));" % \
(style.SQL_KEYWORD('SELECT'),
style.SQL_FIELD('%s_id_seq' % f.m2m_db_table()),
style.SQL_KEYWORD('SELECT'),
style.SQL_FIELD(backend.quote_name('id')),
style.SQL_KEYWORD('FROM'),
style.SQL_TABLE(f.m2m_db_table())))
return output
get_sql_sequence_reset.help_doc = "Prints the SQL statements for resetting PostgreSQL sequences for the given app name(s)."
return backend.get_sql_sequence_reset(style, models.get_models(app))
get_sql_sequence_reset.help_doc = "Prints the SQL statements for resetting sequences for the given app name(s)."
get_sql_sequence_reset.args = APP_ARGS
def get_sql_indexes(app):
@@ -1333,13 +1313,14 @@ def load_data(fixture_labels, verbosity=1):
"Installs the provided fixture file(s) as data in the database."
from django.db.models import get_apps
from django.core import serializers
from django.db import connection, transaction
from django.db import connection, transaction, backend
from django.conf import settings
import sys
# Keep a count of the installed objects and fixtures
count = [0,0]
models = set()
humanize = lambda dirname: dirname and "'%s'" % dirname or 'absolute path'
# Get a cursor (even though we don't need one yet). This has
@@ -1401,6 +1382,7 @@ def load_data(fixture_labels, verbosity=1):
objects = serializers.deserialize(format, fixture)
for obj in objects:
count[0] += 1
models.add(obj.object.__class__)
obj.save()
label_found = True
except Exception, e:
@@ -1422,6 +1404,12 @@ def load_data(fixture_labels, verbosity=1):
else:
if verbosity > 0:
print "Installed %d object(s) from %d fixture(s)" % tuple(count)
sequence_sql = backend.get_sql_sequence_reset(style, models)
if sequence_sql:
if verbosity > 1:
print "Resetting sequences"
for line in sequence_sql:
cursor.execute(line)
transaction.commit()
transaction.leave_transaction_management()