Django importexport error`has\u errors（）`正在针对资源或整个模型进行验证？

Question

我试着跟着：https://github.com/bmihelac/django-import-export/blob/master/docs/getting_started.rst

我将资源定义如下：

from import_export import resources
from core_backend.models.exhibitor import Exhibitor
from django.contrib.auth.models import User
from import_export import fields


class ExhibitorResource(resources.ModelResource):
    email = fields.Field()

    class Meta:
        model = Exhibitor
        fields = ('id', 'stand_id', 'email', 'title')

    def dehydrate_email(self, exhibitor):
        email = User.objects.filter(id=exhibitor.user_id)[0].email
        return email

然后在shell中我尝试：

^{pr2}$

什么原因？has_errors()正在根据资源或整个模型进行验证？

我的资源定义是：

a）模型Exhibitor的字段子集

b）添加了额外字段email不在Exhibitor类中

更新：

我用raise_errors=True运行

res = my_res.import_data(dataset, dry_run=True,raise_errors=True)

它打印：

Traceback (most recent call last):
  File "<console>", line 1, in <module>
  File "/Users/andi/.virtualenvs/daftdjango/lib/python2.7/site-packages/import_export/resources.py", line 350, in import_data
    six.reraise(*sys.exc_info())
  File "/Users/andi/.virtualenvs/daftdjango/lib/python2.7/site-packages/import_export/resources.py", line 335, in import_data
    self.import_obj(instance, row, real_dry_run)
  File "/Users/andi/.virtualenvs/daftdjango/lib/python2.7/site-packages/import_export/resources.py", line 201, in import_obj
    self.import_field(field, obj, data)
  File "/Users/andi/.virtualenvs/daftdjango/lib/python2.7/site-packages/import_export/resources.py", line 193, in import_field
    field.save(obj, data)
  File "/Users/andi/.virtualenvs/daftdjango/lib/python2.7/site-packages/import_export/fields.py", line 83, in save
    setattr(obj, self.attribute, self.clean(data))
  File "/Users/andi/.virtualenvs/daftdjango/lib/python2.7/site-packages/import_export/fields.py", line 51, in clean
    value = self.widget.clean(value)
  File "/Users/andi/.virtualenvs/daftdjango/lib/python2.7/site-packages/import_export/widgets.py", line 137, in clean
    return self.model.objects.get(pk=pk) if pk else None
  File "/Users/andi/.virtualenvs/daftdjango/lib/python2.7/site-packages/django/db/models/manager.py", line 151, in get
    return self.get_queryset().get(*args, **kwargs)
  File "/Users/andi/.virtualenvs/daftdjango/lib/python2.7/site-packages/django/db/models/query.py", line 307, in get
    self.model._meta.object_name)
DoesNotExist: Stand matching query does not exist.

Answer 1

这是一个很老的问题，但这里有一个可能的答案，如果有人得到同样的问题。Django提出这个问题的原因，是因为模型Exhibitor在Stand模型中有一个附加到外键的字段。（我在我的项目中解决了一个类似的问题，在模型中添加了相应的值）。在

对于这种情况，stand_id应该存在于Stand模型中：

展台型号：

stand_id, my_column
2, my_value

然后我们可以使用：

^{pr2}$

由于stand_id2存在，错误应该会消失。。。在