django.db.utils.DatabaseError答案

【问题标题】：django.db.utils.DatabaseErrordjango.db.utils.DatabaseError
【发布时间】：2010-12-26 05:34:24
【问题描述】：

我正在设置一个 django 模型来存储区域，例如美国、德国等。我为表设置了唯一的区域名称。我有一个从列表中填充数据库的脚本，如果有重复的区域名称 IntegrityError 按预期抛出，但随后发生另一个错误，我无法从错误消息中判断原因。有任何想法吗？谢谢！

django.db.utils.DatabaseError: current transaction is aborted, commands ignored until end of transaction block

型号：

class Region(models.Model):
    name = models.CharField(max_length=512, unique=True)

    def __unicode__(self):
        return self.name

填充代码：

    try:
        Region(name=server['locale']).save()
        print 'Added region: %(locale)s' % server
    except IntegrityError:
        pass

我已经确认 IntegrityError 正在发生，但随后我收到了这个我没想到的错误：

  File "/home/daedalus/webapps/wowstatus/lib/python2.6/django/db/models/base.py", line 456, in save
    self.save_base(using=using, force_insert=force_insert, force_update=force_update)
  File "/home/daedalus/webapps/wowstatus/lib/python2.6/django/db/models/base.py", line 549, in save_base
    result = manager._insert(values, return_id=update_pk, using=using)
  File "/home/daedalus/webapps/wowstatus/lib/python2.6/django/db/models/manager.py", line 195, in _insert
    return insert_query(self.model, values, **kwargs)
  File "/home/daedalus/webapps/wowstatus/lib/python2.6/django/db/models/query.py", line 1518, in insert_query
    return query.get_compiler(using=using).execute_sql(return_id)
  File "/home/daedalus/webapps/wowstatus/lib/python2.6/django/db/models/sql/compiler.py", line 788, in execute_sql
    cursor = super(SQLInsertCompiler, self).execute_sql(None)
  File "/home/daedalus/webapps/wowstatus/lib/python2.6/django/db/models/sql/compiler.py", line 732, in execute_sql
    cursor.execute(sql, params)
  File "/home/daedalus/webapps/wowstatus/lib/python2.6/django/db/backends/util.py", line 15, in execute
    return self.cursor.execute(sql, params)
  File "/home/daedalus/webapps/wowstatus/lib/python2.6/django/db/backends/postgresql_psycopg2/base.py", line 44, in execute
    return self.cursor.execute(query, args)
django.db.utils.DatabaseError: current transaction is aborted, commands ignored until end of transaction block

【问题讨论】：

标签： python django

【解决方案1】：

如果出现故障，您应该重置您的数据库状态例如：

from django.db import transaction

@transaction.commit_manually
def Populate():
    try:
        Region(name=server['locale']).save()
        print 'Added region: %(locale)s' % server
    except IntegrityError:
        transaction.rollback()
    else:
        transaction.commit()

【讨论】：

+1，它帮助我解决了一个问题。只是一个小技巧：我必须在渲染模板后提交/回滚事务。

【解决方案2】：

从 django shell 访问数据库时，有时会出现此错误。我通过关闭连接来修复它：

from django.db import connection
connection.close()
cur = connection.cursor()
sql = 'select distinct category from uploads_document'
cur.execute(sql)

在我犯了“select dissinct ..”之类的错误之后

【讨论】：