(Django) 将字符串保存到 EmailField 会引发“以 10 为基数的 int() 的文字无效”

Question

在我的用户数据编辑表单中，我有一个布尔字段，用于在新闻通讯中添加/删除电子邮件。我为此表单编写了一个自定义保存方法：

def save(self, *args, **kwargs):      
    mail = None
    if self.cleaned_data['inf_newsletter']:
        mail = NewsletterEmails(self.instance.user.email)
        mail.save() 
    else:
        try:
            mail = NewsletterEmails.objects.get(email=self.instance.user.email)
        except NewsletterEmails.DoesNotExist:
            pass
        if mail:
            mail.delete()

问题是，当我添加新的 NewsletterEmail 对象时，我将从用户电子邮件中读取的字符串值发送到电子邮件字段中，这会引发错误（或者至少我这么认为）：

Traceback:
File "/home/myapp/site-packages/django/core/handlers/base.py" in get_response
  92.                 response = callback(request, *callback_args, **callback_kwargs)
File "/home/myapp/site-packages/django/contrib/auth/decorators.py" in __call__
  78.             return self.view_func(request, *args, **kwargs)
File "/home/myapp/accounts/views.py" in profile_edit
  95.             form.save()
File "/home/myapp/accounts/forms.py" in save
  58.             mail.save() 
File "/home/myapp/site-packages/django/db/models/base.py" in save
  410.         self.save_base(force_insert=force_insert, force_update=force_update)
File "/home/myapp/site-packages/django/db/models/base.py" in save_base
  470.                         manager.filter(pk=pk_val).extra(select={'a': 1}).values('a').order_by())):
File "/home/myapp/site-packages/django/db/models/manager.py" in filter
  129.         return self.get_query_set().filter(*args, **kwargs)
File "/home/myapp/site-packages/django/db/models/query.py" in filter
  498.         return self._filter_or_exclude(False, *args, **kwargs)
File "/home/myapp/site-packages/django/db/models/query.py" in _filter_or_exclude
  516.             clone.query.add_q(Q(*args, **kwargs))
File "/home/myapp/site-packages/django/db/models/sql/query.py" in add_q
  1675.                             can_reuse=used_aliases)
File "/home/myapp/site-packages/django/db/models/sql/query.py" in add_filter
  1614.                 connector)
File "/home/myapp/site-packages/django/db/models/sql/where.py" in add
  56.                 obj, params = obj.process(lookup_type, value)
File "/home/myapp/site-packages/django/db/models/sql/where.py" in process
  269.                 params = self.field.get_db_prep_lookup(lookup_type, value)
File "/home/myapp/site-packages/django/db/models/fields/__init__.py" in get_db_prep_lookup
  210.             return [self.get_db_prep_value(value)]
File "/home/myapp/site-packages/django/db/models/fields/__init__.py" in get_db_prep_value
  361.         return int(value)

Exception Type: ValueError at /user/profile/
Exception Value: invalid literal for int() with base 10: '[email protected]'

我的 NewsletterEmail 模型：

class NewsletterEmails(models.Model):
    email = models.EmailField(_(u"Email"),)

如何解决这个问题？

Answer 1

mail = NewsletterEmails(self.instance.user.email)

您将输入的电子邮件地址分配给隐式创建的主键字段，而不是电子邮件字段。

使用：

mail = NewsletterEmails(email=self.instance.user.email)