南迁移失败

Question

我有一个南迁移问题。我还是不明白这是怎么回事，什么应该移动什么路径来解决迁移文件[0002_update_order_contact_information.py]打破这种

Romans-MacBook-Pro:holms$ ./manage.py migrate 
cRunning migrations for accounts: 
- Nothing to migrate. 
- Loading initial data for accounts. 
No fixtures found. 
Running migrations for allocations: 
- Nothing to migrate. 
- Loading initial data for allocations. 
No fixtures found. 
Running migrations for adyen: 
- Nothing to migrate. 
- Loading initial data for adyen. 
No fixtures found. 
Running migrations for blog: 
- Nothing to migrate. 
- Loading initial data for blog. 
No fixtures found. 
Running migrations for offers: 
- Nothing to migrate. 
- Loading initial data for offers. 
No fixtures found. 
Running migrations for orders: 
- Migrating forwards to 0011_update_price_fields. 
> orders:0002_update_order_contact_information 
Traceback (most recent call last): 
    File "./manage.py", line 15, in <module> 
    execute_manager(settings) 
    File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/django/core/management/__init__.py", line 438, in execute_manager 
    utility.execute() 
    File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/django/core/management/__init__.py", line 379, in execute 
    self.fetch_command(subcommand).run_from_argv(self.argv) 
    File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/django/core/management/base.py", line 191, in run_from_argv 
    self.execute(*args, **options.__dict__) 
    File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/django/core/management/base.py", line 220, in execute 
    output = self.handle(*args, **options) 
    File "/Users/holms/Development/xxx/xxx/settings/../../lib/south/management/commands/migrate.py", line 105, in handle 
    ignore_ghosts = ignore_ghosts, 
    File "/Users/holms/Development/xxx/xxx/settings/../../lib/south/migration/__init__.py", line 191, in migrate_app 
    success = migrator.migrate_many(target, workplan, database) 
    File "/Users/holms/Development/xxx/xxx/settings/../../lib/south/migration/migrators.py", line 221, in migrate_many 
    result = migrator.__class__.migrate_many(migrator, target, migrations, database) 
    File "/Users/holms/Development/xxx/xxx/settings/../../lib/south/migration/migrators.py", line 292, in migrate_many 
    result = self.migrate(migration, database) 
    File "/Users/holms/Development/xxx/xxx/settings/../../lib/south/migration/migrators.py", line 125, in migrate 
    result = self.run(migration) 
    File "/Users/holms/Development/xxx/xxx/settings/../../lib/south/migration/migrators.py", line 99, in run 
    return self.run_migration(migration) 
    File "/Users/holms/Development/xxx/xxx/settings/../../lib/south/migration/migrators.py", line 81, in run_migration 
    migration_function() 
    File "/Users/holms/Development/xxx/xxx/settings/../../lib/south/migration/migrators.py", line 57, in <lambda> 
    return (lambda: direction(orm)) 
    File "/Users/holms/Development/xxx/migrations/0002_update_order_contact_information.py", line 29, in forwards 
    for o in orders: 
    File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/django/db/models/query.py", line 107, in _result_iter 
    self._fill_cache() 
    File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/django/db/models/query.py", line 772, in _fill_cache 
    self._result_cache.append(self._iter.next()) 
    File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/django/db/models/query.py", line 273, in iterator 
    for row in compiler.results_iter(): 
    File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/django/db/models/sql/compiler.py", line 680, in results_iter 
    for rows in self.execute_sql(MULTI): 
    File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/django/db/models/sql/compiler.py", line 735, in execute_sql 
    cursor.execute(sql, params) 
    File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/django/db/backends/util.py", line 34, in execute 
    return self.cursor.execute(sql, params) 
    File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/django/db/backends/sqlite3/base.py", line 234, in execute 
    return Database.Cursor.execute(self, query, params) 
django.db.utils.DatabaseError: no such column: orders_order.pre_paid 

部分：

# encoding: utf-8 
import datetime 
from south.db import db 
from south.v2 import DataMigration 
from django.db import models 

class Migration(DataMigration): 

    def forwards(self, orm): 
     Order = models.get_model('orders', 'Order') 

     orders = Order.all_objects.select_related('buyer') 
     orders = orders.filter(first_name__isnull=True) 
     orders = orders.filter(buyer__isnull=False) 
     orders = orders.exclude(payment_status="UNFINISHED") 

     userfields = (
      'gender', 'birth_date', 'first_name', 'last_name', 'street_number', 

Answer 1

你不应该直接与您的模型进行交互。您使用django.models，但该版本的模型处于错误状态。您希望模型在迁移时的状态为0002。 south manual指出您应该通过参数orm访问您的模型。

注意，我们使用orm.User访问用户模型 - 这给了我们用户的创建此迁移时起版，所以如果我们要运行在未来的迁移，也不会得到完全不同的新的用户模型。 source

所以，你应该重写迁移这样的：

orders = orm.Order.objects.all() 

这样

甚至：

Order = orm.Order