Django：所有形式错误消息都作为单个字符串

Question

我正在尝试在视图中以文本形式访问表单错误消息，并将其用作单个字符串。

error_string = ' '.join(form.errors['email'].as_data())

我收到此错误：

sequence item 0: expected str instance, ValidationError found

我该怎么办？

Answer 1

form.errors = {
    'username': 
        ['This name is reserved and cannot be registered.'], 
    'password2': 
        ['This password is too short. It must contain at least 8 characters.', 
        'This password is too common.']
}

error_string = ' '.join([' '.join(x for x in l) for l in list(form.errors.values())])

print(error_string)
>>> This name is reserved and cannot be registered. This password is too short. It must contain at least 8 characters. This password is too common.

Answer 2

您想要将错误字符串列表连接在一起，因此请使用form.errors['email'].

error_string = ' '.join(form.errors['email'])

您不想使用该as_data()方法，因为它返回实例列表ValidationError而不是字符串。