Question

我从Django开始。我有一些网站设置与SQLite工作，但在更改数据库引擎后postgresql manage.py syncdb返回错误。我已谷歌搜索2天但仍然没有任何作用对我.Postgres用户'乔'拥有超级用户权限和本地'乔'db存在。

Postgresql正在运行：

/etc/init.d/postgresql status
Running clusters: 9.1/main

这是我的settings.py

部分

DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.postgresql_psycopg2',  #
        'NAME': 'joe',                                       # 
        'USER': 'joe',                                       # 
        'PASSWORD': 'asdf',                                  # 
        'HOST': 'localhost',                                 # 
        'PORT': '5432',                       .
    }
}

错误：

$ python manage.py syncdb
Syncing...
Traceback (most recent call last):
  File "manage.py", line 11, in <module>
    execute_manager(settings)
  File "/home/m/.virtualenvs/mayan/local/lib/python2.7/site-packages/django/core/management/__init__.py", line 438, in execute_manager
    utility.execute()
  File "/home/m/.virtualenvs/mayan/local/lib/python2.7/site-packages/django/core/management/__init__.py", line 379, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "/home/m/.virtualenvs/mayan/local/lib/python2.7/site-packages/django/core/management/base.py", line 191, in run_from_argv
    self.execute(*args, **options.__dict__)
  File "/home/m/.virtualenvs/mayan/local/lib/python2.7/site-packages/django/core/management/base.py", line 220, in execute
    output = self.handle(*args, **options)
  File "/home/m/.virtualenvs/mayan/local/lib/python2.7/site-packages/django/core/management/base.py", line 351, in handle
    return self.handle_noargs(**options)
  File "/home/m/.virtualenvs/mayan/local/lib/python2.7/site-packages/south/management/commands/syncdb.py", line 90, in handle_noargs
    syncdb.Command().execute(**options)
  File "/home/m/.virtualenvs/mayan/local/lib/python2.7/site-packages/django/core/management/base.py", line 220, in execute
    output = self.handle(*args, **options)
  File "/home/m/.virtualenvs/mayan/local/lib/python2.7/site-packages/django/core/management/base.py", line 351, in handle
    return self.handle_noargs(**options)
  File "/home/m/.virtualenvs/mayan/local/lib/python2.7/site-packages/django/core/management/commands/syncdb.py", line 59, in handle_noargs
    tables = connection.introspection.table_names()
  File "/home/m/.virtualenvs/mayan/local/lib/python2.7/site-packages/django/db/backends/__init__.py", line 792, in table_names
    return self.get_table_list(cursor)
  File "/home/m/.virtualenvs/mayan/local/lib/python2.7/site-packages/django/db/backends/postgresql/introspection.py", line 31, in get_table_list
    AND pg_catalog.pg_table_is_visible(c.oid)""")
  File "/home/m/.virtualenvs/mayan/local/lib/python2.7/site-packages/django/db/backends/util.py", line 34, in execute
    return self.cursor.execute(sql, params)
  File "/home/m/.virtualenvs/mayan/local/lib/python2.7/site-packages/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

谢谢！

Answer 1

我的建议是转到django.db.backends.postgresql_psycopg2.base并插入print query，以便CursorWrapper看起来像。

class CursorWrapper:
    ...
    def execute(self, query, args=None):
        print query # New print statement here
        try:
            return self.cursor.execute(query, args)

这将打印出每个查询数据库的查询，并希望您在尝试运行python manage.py syncdb时可以识别有问题的SQL查询

Answer 2

首先，您的数据库是否已正确同步？尝试运行python manage.py syncdb。如果这没有帮助，请继续阅读......

这是postgres在查询产生错误时所执行的操作，并且您尝试运行另一个查询而不首先在发生错误时回滚事务。所以你应该先rollback 出现问题时的DB状态。由于它以事务为基础，因此会引发问题。要修复它，您需要弄清楚代码中执行错误查询的位置。

使用postgresql服务器中的log_statement选项进行调试可能会有所帮助。

以下解决方案是我遇到同样错误时的问题。

from django.db import transaction

@transaction.commit_manually
def db_insert():
    try:
        YourModel(name='hello world').save() #trying to save
    except: #any error rollback
        transaction.rollback()
    else: #if all fine, commit
        transaction.commit()

希望这有帮助。

Answer 3

在我的情况下，我必须禁用某些应用，执行syncdb，再次启用应用和再次使用syncdb。

Django与postgresql - manage.py syncdb返回错误

3 个答案: