Question

我有以下代码：

class SampleModel(models.Model):
    sample_model_id = models.AutoField(primary_key=True)
    some_date = models.TextField()

def some_function():
    s = G(SampleModel, sample_model_id=1234, some_data='abcd')
    assert s.sample_model_id == 1
    assert s.some_data == 'abcd'

断言语句通过（它们是真实的语句）。知道为什么我不能设置sample_model_id吗？

我使用的是Python 2.7，Django 1.4.5和django-dynamic-fixture 1.6.5（最新版本）。

Answer 1

class SampleModel(models.Model):
    some_data = models.TextField()

如果我使用上面的类（使用自动id字段），我会得到预期的结果。

>>> from django_dynamic_fixture import G, get
>>> s = G(SampleModel, id=1234, some_data='abcd')
>>> s.id
1234
>>> s.some_data
'abcd'

使用问题中给出的样本模型，得到与问题相同的结果。

指定id而不是sample_model_id会引发异常。

>>> s = G(SampleModel, id=1234, some_data='abcd')
Traceback (most recent call last):
  File "<console>", line 1, in <module>
  File "/home/falsetru/.virtualenvs/django15/local/lib/python2.7/site-packages/django_dynamic_fixture/__init__.py", line 107, in get
    return d.get(model, shelve=shelve, **kwargs)
  File "/home/falsetru/.virtualenvs/django15/local/lib/python2.7/site-packages/django_dynamic_fixture/ddf.py", line 507, in get
    instance = self.new(model_class, shelve=shelve, named_shelve=named_shelve, **kwargs)
  File "/home/falsetru/.virtualenvs/django15/local/lib/python2.7/site-packages/django_dynamic_fixture/ddf.py", line 436, in new
    self.set_data_for_a_field(model_class, instance, field, persist_dependencies=persist_dependencies, **configuration)
  File "/home/falsetru/.virtualenvs/django15/local/lib/python2.7/site-packages/django_dynamic_fixture/ddf.py", line 348, in set_data_for_a_field
    data = self._process_field_with_default_fixture(field, model_class, persist_dependencies)
  File "/home/falsetru/.virtualenvs/django15/local/lib/python2.7/site-packages/django_dynamic_fixture/ddf.py", line 335, in _process_field_with_default_fixture
    data = self.data_fixture.generate_data(field)
  File "/usr/lib/python2.7/code.py", line 216, in interact
    sys.ps2
UnsupportedFieldError: polls.models.SampleModel.sample_model_id

<强>更新

解决方法

同时指定id和sample_model_id。

>>> s = G(SampleModel, id=1234, sample_model_id=1234, some_data='abcd')
>>> s.sample_model_id
1234
>>> s.some_data
'abcd'

实际上，id值不在内部使用;您可以为id指定任何值。

>>> s = G(SampleModel, id=None, sample_model_id=5555, some_data='abcd')
>>> s.sample_model_id
5555
>>> s.some_data
'abcd'

为什么我不能在django-dynamic-fixture装置中设置主键？

1 个答案:

解决方法