我正在寻找一个表单字段，它为给定字段获取多个值，验证它们，并将它们存储为列表。
例如，可以运行以下 curl 命令并发布几个名为“电子邮件”的 POST 参数
curl -X POST -d email=test@example.com -d email=test2@example.com http://url/here/
在我看来，我可以执行以下操作以直接从 POST 数据中获取电子邮件列表。
email = request.POST.getlist('email')
但是，我想利用表单验证来清除 POST 数据中指定的所有电子邮件。
理想情况下，我想运行 form.is_valid() 然后访问表单上的 clean_data['email'] 键将返回有效电子邮件地址列表。
我已经研究过使用 MultipleChoice 字段和类似字段（因为它们接受具有相同名称的多个输入），但这些字段要求您事先定义选择。我也考虑过使用表单集，但是对于我在这种情况下尝试做的事情来说，这些似乎过于复杂。
有谁知道以这种方式表现的任何领域？谢谢阅读。
我正在寻找类似的东西，我发现了这个：http ://djangosnippets.org/snippets/497/
from django import newforms as forms
class SeparatedValuesField(forms.Field):
"""
A Django newforms field which takes another newforms field during
initialization and validates every item in a separated list with
this field class. Please use it like this::
from django.newforms import EmailField
emails = SeparatedValuesField(EmailField)
You would be able to enter a string like 'john@doe.com,guido@python.org'
because every email address would be validated when clean() is executed.
This of course also applies to any other Field class.
You can define the sepator (default: ',') during initialization with the
``separator`` parameter like this::
from django.newforms import EmailField
emails = SeparatedValuesField(EmailField, separator='###')
If validation succeeds it returns the original data, though the already
splitted value list can be accessed with the get_list() method.
>>> f = SeparatedValuesField(forms.EmailField)
>>> f.clean('foo@bar.com,bar@foo.com')
'foo@bar.com,bar@foo.com'
>>> f.get_list()
['foo@bar.com', 'bar@foo.com']
>>> f.clean('foobar,foo@bar.com,bar@foo.com')
Traceback (most recent call last):
...
ValidationError: <unprintable ValidationError object>
>>> u = SeparatedValuesField(forms.URLField)
>>> u.clean('http://foo.bar.com,http://foobar.com')
'http://foo.bar.com,http://foobar.com'
>>> u.clean('http:foo.bar.com')
Traceback (most recent call last):
...
ValidationError: <unprintable ValidationError object>
>>> f = SeparatedValuesField(forms.EmailField, separator='###')
>>> f.clean('foo@bar.com###bar@foo.com')
'foo@bar.com###bar@foo.com'
>>> f.clean('foobar###foo@bar.com###bar@foo.com')
Traceback (most recent call last):
...
ValidationError: <unprintable ValidationError object>
"""
def __init__(self, base_field=None, separator=',', *args, **kwargs):
super(SeparatedValuesField, self).__init__(*args, **kwargs)
self.base_field = base_field
self.separator = separator
def clean(self, data):
if not data:
raise forms.ValidationError('Enter at least one value.')
self.value_list = data.split(self.separator)
if self.base_field is not None:
base_field = self.base_field()
for value in self.value_list:
base_field.clean(value)
return data
def get_list(self):
return self.value_list
def _test():
import doctest
doctest.testmod()
if __name__ == "__main__":
_test()
但是，这并不完全令人满意：例如，对于电子邮件列表，如果只有一封电子邮件无效，则整个字段都无效。
人们可能会重写 clean 方法，使其仅返回有效的“base_fields”，而不是完全抛出 ValidationError。
在 2018 年，这个问题仍然没有令人满意的答案，所以我编写了自己的字段，其行为就像 OP 想要的那样。在这里查看。
解决原来的问题：
表格.py：
import django.forms as forms
from multivaluefield import MultiValueField
class MultiEmailForm(forms.Form):
emails = MultiValueField(forms.EmailField(), "email")
查看代码：
form = MultiEmailForm(request.POST)
if form.is_valid:
emails = form.cleaned_data["emails"]
# do something with emails
else:
errors = form.errors
# do something with errors
django-multi-email-field可以这样做：https ://github.com/fle/django-multi-email-field
示例表单代码：
from django import forms
from multi_email_field.forms import MultiEmailField
class SendMessageForm(forms.Form):
emails = MultiEmailField()
示例视图代码：
assert form.is_valid()
print(form.cleaned_data["emails"])