我在Django中为我的表使用数据库路由器，但由于一些奇怪的原因，South继续将表添加到默认数据库而不是正确的数据库。南方不支持路由器吗？我的包含模型的应用程序名为backend。
我的settings.py：
DATABASE_ROUTERS = ['project.router.DatabaseAppsRouter']
DATABASE_APPS_MAPPING = {'backend': 'darwin_evolution'}
DATABASES = {
'default': {
'ENGINE': 'django.db.backends.mysql',
'NAME': 'darwin_django',
'USER': '',
'PASSWORD': '',
'PORT': '8889',
},
'weblaege_conditions': {
'ENGINE': 'django.db.backends.mysql',
'NAME': 'darwin_evolution',
'USER': '',
'PASSWORD': '',
# 'HOST': '/Applications/MAMP/tmp/mysql/mysql.sock', # Or an IP Address that your DB is hosted on
'PORT': '8889',
}
}
router.py：
来自django.conf导入设置
class DatabaseAppsRouter(object):
"""
A router to control all database operations on models for different
databases.
In case an app is not set in settings.DATABASE_APPS_MAPPING, the router
will fallback to the `default` database.
Settings example:
DATABASE_APPS_MAPPING = {'app1': 'db1', 'app2': 'db2'}
"""
def db_for_read(self, model, **hints):
""""Point all read operations to the specific database."""
if settings.DATABASE_APPS_MAPPING.has_key(model._meta.app_label):
return settings.DATABASE_APPS_MAPPING[model._meta.app_label]
return None
def db_for_write(self, model, **hints):
"""Point all write operations to the specific database."""
if settings.DATABASE_APPS_MAPPING.has_key(model._meta.app_label):
return settings.DATABASE_APPS_MAPPING[model._meta.app_label]
return None
def allow_relation(self, obj1, obj2, **hints):
"""Allow any relation between apps that use the same database."""
db_obj1 = settings.DATABASE_APPS_MAPPING.get(obj1._meta.app_label)
db_obj2 = settings.DATABASE_APPS_MAPPING.get(obj2._meta.app_label)
if db_obj1 and db_obj2:
if db_obj1 == db_obj2:
return True
else:
return False
return None
def allow_syncdb(self, db, model):
"""Make sure that apps only appear in the related database."""
if db in settings.DATABASE_APPS_MAPPING.values():
return settings.DATABASE_APPS_MAPPING.get(model._meta.app_label) == db
elif settings.DATABASE_APPS_MAPPING.has_key(model._meta.app_label):
return False
return None
syncdb问题：
./manage.py syncdb
Syncing...
Creating tables ...
Traceback (most recent call last):
File "./manage.py", line 10, in <module>
execute_from_command_line(sys.argv)
File "/usr/local/lib/python2.7/dist-packages/django/core/management/__init__.py", line 399, in execute_from_command_line
utility.execute()
File "/usr/local/lib/python2.7/dist-packages/django/core/management/__init__.py", line 392, in execute
self.fetch_command(subcommand).run_from_argv(self.argv)
File "/usr/local/lib/python2.7/dist-packages/django/core/management/base.py", line 242, in run_from_argv
self.execute(*args, **options.__dict__)
File "/usr/local/lib/python2.7/dist-packages/django/core/management/base.py", line 285, in execute
output = self.handle(*args, **options)
File "/usr/local/lib/python2.7/dist-packages/django/core/management/base.py", line 415, in handle
return self.handle_noargs(**options)
File "/usr/local/lib/python2.7/dist-packages/south/management/commands/syncdb.py", line 92, in handle_noargs
syncdb.Command().execute(**options)
File "/usr/local/lib/python2.7/dist-packages/django/core/management/base.py", line 285, in execute
output = self.handle(*args, **options)
File "/usr/local/lib/python2.7/dist-packages/django/core/management/base.py", line 415, in handle
return self.handle_noargs(**options)
File "/usr/local/lib/python2.7/dist-packages/django/core/management/commands/syncdb.py", line 112, in handle_noargs
emit_post_sync_signal(created_models, verbosity, interactive, db)
File "/usr/local/lib/python2.7/dist-packages/django/core/management/sql.py", line 216, in emit_post_sync_signal
interactive=interactive, db=db)
File "/usr/local/lib/python2.7/dist-packages/django/dispatch/dispatcher.py", line 185, in send
response = receiver(signal=self, sender=sender, **named)
File "/usr/local/lib/python2.7/dist-packages/django/contrib/auth/management/__init__.py", line 101, in create_permissions
auth_app.Permission.objects.using(db).bulk_create(perms)
File "/usr/local/lib/python2.7/dist-packages/django/db/models/query.py", line 356, in bulk_create
self._batched_insert(objs_without_pk, fields, batch_size)
File "/usr/local/lib/python2.7/dist-packages/django/db/models/query.py", line 835, in _batched_insert
using=self.db)
File "/usr/local/lib/python2.7/dist-packages/django/db/models/manager.py", line 232, in _insert
return insert_query(self.model, objs, fields, **kwargs)
File "/usr/local/lib/python2.7/dist-packages/django/db/models/query.py", line 1511, in insert_query
return query.get_compiler(using=using).execute_sql(return_id)
File "/usr/local/lib/python2.7/dist-packages/django/db/models/sql/compiler.py", line 899, in execute_sql
cursor.execute(sql, params)
File "/usr/local/lib/python2.7/dist-packages/django/db/backends/util.py", line 69, in execute
return super(CursorDebugWrapper, self).execute(sql, params)
File "/usr/local/lib/python2.7/dist-packages/django/db/backends/util.py", line 53, in execute
return self.cursor.execute(sql, params)
File "/usr/local/lib/python2.7/dist-packages/django/db/backends/mysql/base.py", line 124, in execute
return self.cursor.execute(query, args)
File "/usr/lib/python2.7/dist-packages/MySQLdb/cursors.py", line 176, in execute
if not self._defer_warnings: self._warning_check()
File "/usr/lib/python2.7/dist-packages/MySQLdb/cursors.py", line 92, in _warning_check
warn(w[-1], self.Warning, 3)
_mysql_exceptions.Warning: Data truncated for column 'name' at row 29
答案 0 :(得分：0)
要在schemamigration之后反映数据库中的更改，您需要运行
./manage.py migrate --database=weblaege_conditions
根据documentation，它在默认数据库上运行，但通过提供--database参数，您可以在不同的数据库中创建表。