django grok YML？django没有加载夹具YML文件(yml不是已知的序列化)

Question

我已经成功创建了我的第一个django项目.

我的项目foo和foobar中有两个应用程序.

我在每个app文件夹中创建了一个名为"fixtures"的文件夹.我没有在settings.yml中指定fixtures目录,所以(根据文档),django应该在我的{app}/fixtures文件夹中查找.

在{app}/fixtures文件夹中,我有几个YML文件.我已将各个模块的初始数据拆分为单独的YML文件,确保没有跨文件依赖关系(即所有相关模型都在同一个YML文件中,并且祖先在使用它们的模型之前出现在文件中).

但是,当我成功创建db对象后运行./manage.py syncdb时,会出现以下消息:

找不到固定装置

然后我尝试使用loaddata命令手动加载灯具:

./manage.py loaddata 0100_foobar.yml
Problem installing fixture '0100_foobar': yml is not a known serialization 

上面的链接中给出的文档是错误的吗？或者我是否需要安装模块才能让django解决YML问题？

顺便说一下,YML文件正确解析并且已经检查了它的正确性(我在另一个项目中成功使用它们) - 所以这不是问题

[编辑]

我按照Manoj的说明安装了PyYaml并重命名了我的灯具文件.我能够进一步下线,但我仍然遇到问题(顺便说一下,我正在使用PyYaml 3.0.9).

这是我的项目ORM中的模型(即{app} /model.py):

class Currency(models.Model):
    short_name = models.CharField(max_length=3, db_index=True, unique=True, null=False) # ISO Code
    long_name = models.CharField(max_length=64, db_index=True, unique=True, null=False)
    spot_settle = models.IntegerField(null=False, default=0)
    rounding = models.IntegerField(null=False, default=2)

这是我导入的YAML文件:

Currency:    
  currency_aud : { short_name: AUD , long_name: Australia - Dollars , spot_settle: 0, rounding: 2 }    
  currency_cad : { short_name: CAD , long_name: Canada - Dollars , spot_settle: 0, rounding: 2 }    
  currency_eur : { short_name: EUR , long_name: Euro Member Countries - Euro , spot_settle: 0, rounding: 2 }    
  currency_gbp : { short_name: GBP , long_name: United Kingdom - Pounds , spot_settle: 0, rounding: 2 }    
  currency_jpy : { short_name: JPY , long_name: Japan - Yen , spot_settle: 0, rounding: 2 }    
  currency_usd : { short_name: USD , long_name: United States Of America - Dollars , spot_settle: 0, rounding: 2 }    
  currency_zar : { short_name: ZAR , long_name: South Africa - Rand, spot_settle: 0, rounding: 2 }    
  currency_hkd : { short_name: HKD , long_name: Hong Kong Dollar, spot_settle: 0, rounding: 2 }    
  currency_nzd : { short_name: NZD , long_name: New Zealand Dollar, spot_settle: 0, rounding: 2 }    
  currency_sgd : { short_name: SGD , long_name: Singapore Dollar, spot_settle: 0, rounding: 2 }    
  currency_dkk : { short_name: DKK , long_name: Danish Krone, spot_settle: 0, rounding: 2 }    
  currency_sek : { short_name: SEK , long_name: Swedish Krona, spot_settle: 0, rounding: 2 }    
  currency_chf : { short_name: CHF , long_name: Swiss Franc, spot_settle: 0, rounding: 2 }

这是运行时的堆栈跟踪./manage.py loaddata myapp/fixtures/currency.yaml

me@somebox:~/work/demo/myproj$ ./manage.py loaddata reference/fixtures/0100_currency.yaml 
Installing yaml fixture 'reference/fixtures/0100_currency' from absolute path.
Problem installing fixture 'reference/fixtures/0100_currency.yaml': Traceback (most recent call last):
  File "/usr/local/lib/python2.6/dist-packages/django/core/management/commands/loaddata.py", line 165, in handle
    for obj in objects:
  File "/usr/local/lib/python2.6/dist-packages/django/core/serializers/pyyaml.py", line 57, in Deserializer
    for obj in PythonDeserializer(yaml.load(stream), **options):
  File "/usr/local/lib/python2.6/dist-packages/django/core/serializers/python.py", line 84, in Deserializer
    Model = _get_model(d["model"])
TypeError: string indices must be integers, not str

Answer 1

我试图在我的一个项目中重现你的问题.显然loaddata希望文件的扩展名与序列化格式相匹配.在您的情况下,您应该将文件重命名为 0100_foobar.yaml(注意新的扩展名).

局部测试显示我的假设是正确的.

PS:YAML序列化需要PyYAML库.如果您还没有,请安装PyYAML.

更新

我将OP的模型复制到我的一个项目中.当我试图按原样加载OP给出的样本YAML时,我得到了同样的错误.

之后,我使用admin应用程序添加了一些数据,并用于django.core.serializers.serialize以YAML格式转储数据.

from django.core.serializers import serialize
from app.models import Currency
print serializers.serialize("yaml", Currency.objects.all())

我得到的结果与OP发布的结果大不相同.见下文.我为模型添加了三个实例,它们正在显示.

- fields: {long_name: Australia - Dollars, rounding: 2, short_name: AUD, spot_settle: 0}
  model: app.currency
  pk: 1
- fields: {long_name: Canada - Dollars, rounding: 2, short_name: CAD, spot_settle: 0}
  model: app.currency
  pk: 2
- fields: {long_name: Euro Member Countries - Euro, rounding: 2, short_name: EUR,
    spot_settle: 0}
  model: app.currency
  pk: 3

我能够毫无困难地加载这些数据.

鉴于上述情况,我怀疑OP的YAML文件有问题.@skyeagle,您可以尝试转储现有数据然后尝试加载转储吗？