Django 在尝试保存对象属性时抛出 "invalid literal for int() with base 10: ' '"

Question

当我尝试保存两个对象属性的添加时，Django 不断抛出以下内容。

invalid literal for int() with base 10: ''

观点是:

def buy_pack(request, pack_name):
if request.method == 'POST':
    form = CardForm(request.POST, request.user)
    pack = Pack.objects.get(name=pack_name)
    stripe_user = request.user.username

    if form.is_valid():
        token = request.POST['stripeToken']
        charge = stripe.Charge.create(
            amount=pack.cost,
            currency="usd",
            card=token,
            description=stripe_user+"_"+pack.name,
        )

        datestring = charge.created
        dt = datetime.datetime.fromtimestamp(float(datestring))
        new_purchase = Purchase(user=request.user, date_time=dt, pack=pack, payment_id=charge.id, last_4_digits=charge.card.last4)
        new_purchase.save()

        user_profile = request.user.get_profile()
        t = user_profile.videos_remaining + pack.videos_allowed
        user_profile.videos_remaining = t
        user_profile.save()

有问题的模型是:

class UserProfile(models.Model):
    user = models.ForeignKey(User, unique=True)
    name = models.CharField(max_length=50)
    videos_remaining = models.IntegerField(default=1)
    last_4_digits = models.IntegerField(max_length=4, blank=True)
    stripe_id = models.CharField(max_length=255, blank=True)

    def __unicode__(self):
        return self.name

和:

class Pack(models.Model):
    name = models.CharField(max_length=25)
    videos_allowed = models.IntegerField()
    cost = models.IntegerField()

    def __unicode__(self):
        return self.name

回溯是:

Traceback:
File "/Library/Python/2.7/site-packages/django/core/handlers/base.py" in get_response
  111.                         response = callback(request, *callback_args, **callback_kwargs)
File "/Users/Jeff/Dropbox/xxxxx/Code/thankyouvid/../thankyouvid/main/views.py" in buy_pack
  48.           user_profile.save()
File "/Library/Python/2.7/site-packages/django/db/models/base.py" in save
  460.         self.save_base(using=using, force_insert=force_insert, force_update=force_update)
File "/Library/Python/2.7/site-packages/django/db/models/base.py" in save_base
  526.                         rows = manager.using(using).filter(pk=pk_val)._update(values)
File "/Library/Python/2.7/site-packages/django/db/models/query.py" in _update
  491.         return query.get_compiler(self.db).execute_sql(None)
File "/Library/Python/2.7/site-packages/django/db/models/sql/compiler.py" in execute_sql
  869.         cursor = super(SQLUpdateCompiler, self).execute_sql(result_type)
File "/Library/Python/2.7/site-packages/django/db/models/sql/compiler.py" in execute_sql
  725.             sql, params = self.as_sql()
File "/Library/Python/2.7/site-packages/django/db/models/sql/compiler.py" in as_sql
  834.                 val = field.get_db_prep_save(val, connection=self.connection)
File "/Library/Python/2.7/site-packages/django/db/models/fields/subclassing.py" in inner
  28.             return func(*args, **kwargs)
File "/Library/Python/2.7/site-packages/django/db/models/fields/subclassing.py" in inner
  28.             return func(*args, **kwargs)
File "/Library/Python/2.7/site-packages/django/db/models/fields/__init__.py" in get_db_prep_save
  276.         return self.get_db_prep_value(value, connection=connection, prepared=False)
File "/Library/Python/2.7/site-packages/django/db/models/fields/subclassing.py" in inner
  53.             return func(*args, **kwargs)
File "/Library/Python/2.7/site-packages/django/db/models/fields/subclassing.py" in inner
  53.             return func(*args, **kwargs)
File "/Library/Python/2.7/site-packages/django/db/models/fields/__init__.py" in get_db_prep_value
  271.             value = self.get_prep_value(value)
File "/Library/Python/2.7/site-packages/django/db/models/fields/__init__.py" in get_prep_value
  876.         return int(value)

Exception Type: ValueError at /buy_pack/most/
Exception Value: invalid literal for int() with base 10: ''

作为引用，user_profile.videos_remaining 的存储值为 1，pack.videos_allowed 的存储值为 100。我希望它将两个值相加并将它们存储为 101 在 user_profile.videos_remaining 对象属性中。

如果您能提供任何帮助，我将不胜感激。

编辑:问题最终是我没有传递整数字段 last_4_digits 的值。如果您有一个带有空白 = True 的 integerField 并且不为其提交值，似乎会发生这种情况。

Answer 1

问题最终是我没有为整数字段 last_4_digits 传递值。如果您有一个带有空白 = True 的 integerField 并且不为其提交值，似乎会发生这种情况。