3

从 git repo 运行 Django 1.5.x。使用南方来管理迁移。我有一个这样的模型：

class Company(models.Model):
    name = models.CharField(max_length = 100)
    subdomain = models.CharField(max_length = 50)
    is_active = models.BooleanField(default=True)
    prefs = models.TextField(max_length=8*1024, null=True, blank=True, default=None)

    is_dev = models.BooleanField(default=False) # this is a development company - internal to 15Five

    trial_start_date = models.DateField(null=True, blank=True, default=None)
    trial_length_days = models.PositiveIntegerField(default = 28)

    email_domain = models.CharField(max_length = 100, null=True, blank=True, default=None)
    cohort = models.ForeignKey(Cohort, null=True, blank=True, default=None)

    create_ts = models.DateTimeField(_('Created'), default=timezone.now)
    update_ts = models.DateTimeField(_('Updated'), default=timezone.now)
    deactivate_ts = models.DateTimeField(_('Deactivated'), null=True, blank=True, default=None)
    converted_to_paying_ts = models.DateTimeField(_('Converted'), null=True, blank=True, default=None)

    features = models.ManyToManyField(Feature,
                                      verbose_name=_('feature'), blank=True,
                                      help_text='A feature which can be turned on or off for a company')

我在 django admin 中创建了一家公司。我曾经manage.py dumpdata ff.company --indent=2导出一个 JSON 夹具：

[
{
  "pk": 1,
  "model": "ff.company",
  "fields": {
    "cohort": null,
    "subdomain": "zzz",
    "name": "zzz",
    "trial_start_date": null,
    "trial_length_days": 0,
    "converted_to_paying_ts": "2012-12-02T11:06:10Z",
    "is_active": true,
    "update_ts": "2012-12-02T11:06:11Z",
    "is_dev": true,
    "deactivate_ts": null,
    "create_ts": "2012-12-02T11:05:56Z",
    "email_domain": "zzz.com",
    "prefs": "",
    "features": []
  }
}
]

我清除了我的 ff_company 表并运行了我的迁移，但我收到了一个错误：

Error in migration: ff:0004_create_default_companies
DoesNotExist: Problem installing fixture 'C:\<redacted>/migrations/fixtures/create_default_companies.json': Company matching query does not exist. Lookup parameters were {'id': 1}

知道问题可能是什么吗？我认为南不是问题，因为如果我手动加载夹具也会出现错误：

>manage.py loaddata ..\migrations\fixtures\create_default_companies.json
DoesNotExist: Problem installing fixture 'C:\<redacted>\migrations\fixtures\create_default_companies.json': Company matching query does not exist. Lookup parameters were {'id': 1}
4

1 回答 1

14

我的公司模型上有 pre_save 和 post_save 信号触发器。这些没有检查raw参数，而是试图对不存在的数据库值做一些聪明的事情。

于 2012-12-02T11:21:36.780 回答