Django South Postgres数据迁移问题

我正在添加一个运行模式迁移的新模型。然后用数据迁移向该表添加数据。我在Postgres数据库上运行这个。我已经在本地成功运行SQLite数据库，所以我猜这是一个数据库特定的问题。在将datamigration出现的错误是：Django South Postgres数据迁移问题

Error in migration: app:0109_add_reservation_rates 
DatabaseError: column "rate_currency" specified more than once 
LINE 1: ...rate_currency", "rate", "reservation_id", "date", "rate_curr... 
                  ^

有没有更好的错误，南南合作给我，我还没有找到一种方法来产生南是应该运行的SQL。我检查了schemamigration，datamigration并没有重复字段名...

下面是实际的迁移： 0108_etc ... PY

# -*- coding: utf-8 -*- 
import datetime 
from south.db import db 
from south.v2 import SchemaMigration 
from django.db import models 


class Migration(SchemaMigration): 

    def forwards(self, orm): 
     # Adding model 'ReservationRate' 
     db.create_table(u'app_reservationrate', (
      (u'id', self.gf('django.db.models.fields.AutoField')(primary_key=True)), 
      ('created_on', self.gf('django.db.models.fields.DateTimeField')(auto_now_add=True, blank=True)), 
      ('updated_on', self.gf('django.db.models.fields.DateTimeField')(auto_now=True, blank=True)), 
      ('reservation', self.gf('django.db.models.fields.related.ForeignKey')(related_name='reservation_rates', to=orm['app.Reservation'])), 
      ('room', self.gf('django.db.models.fields.related.ForeignKey')(related_name='reservation_rates', to=orm['app.Room'])), 
      ('date', self.gf('django.db.models.fields.DateField')(db_index=True)), 
      ('rate_currency', self.gf('djmoney.models.fields.CurrencyField')(default='USD')), 
      ('rate', self.gf('djmoney.models.fields.MoneyField')(max_digits=10, decimal_places=2, default_currency='USD')), 
     )) 
     db.send_create_signal(u'app', ['ReservationRate']) 

     # Adding unique constraint on 'ReservationRate', fields ['reservation', 'room', 'date'] 
     db.create_unique(u'app_reservationrate', ['reservation_id', 'room_id', 'date'])

0109_etc ... PY

coding: 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): 
     for reservation in orm.Reservation.objects.all(): 
      # Loop through some code, get rates, and dates for creating ReservationRate objects... 
      orm.ReservationRate.objects.create(reservation=reservation, room=stay.room, date=date, rate=rate)

有人有线索如何解决这个问题？

来源

2013-07-01 tzenderman

它不是数据库特定的。它明确指出'rate_currency'出现两次 – karthikr

这不是。现在将实际的迁移片段添加到问题中。 – tzenderman

不完全确定为什么，但运行./manage.py migrate -v2 app使一切工作正常。我相信这个选项应该运行迁移并输出关于它正在运行的更多信息。

来源

2013-07-01 23:28:30 tzenderman

Django South Postgres数据迁移问题

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