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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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25
django/db/backends/postgresql_psycopg2/base.py
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@@ -169,6 +169,31 @@ def get_sql_flush(style, tables, sequences):
return sql
else:
return []
def get_sql_sequence_reset(style, model_list):
"Returns a list of the SQL statements to reset sequences for the given models."
from django.db import models
output = []
for model in model_list:
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(quote_name(f.column)),
style.SQL_KEYWORD('FROM'),
style.SQL_TABLE(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(quote_name('id')),
style.SQL_KEYWORD('FROM'),
style.SQL_TABLE(f.m2m_db_table())))
return output
OPERATOR_MAPPING = {
'exact': '= %s',