我正在一个项目中,我想让很多用户注册许多offering_funds,所以我添加了一个ManyToManyField。我还希望Django能够自动找出哪个用户已经登录,并自动填充用户字段,所以我把它写在了我的views.py文件中。然而在这样做时,我遇到了错误:Django:“NOT NULL约束失败:users_investment.user_id”错误
NOT NULL constraint failed: users_investment.user_id
这里是我的models.py:
# Not sure if this class is relevant to my question
class UserProfile(models.Model):
user = models.OneToOneField(User)
first_name = models.CharField(max_length=24)
last_name = models.CharField(max_length=24)
phone_number = models.CharField(max_length=12)
account_type = models.CharField(max_length=55, choices=ACCOUNT_TYPES)
def __str__(self):
return self.user.username
class Investment(models.Model):
user = models.ManyToManyField(User, blank=True)
offered_fund = models.ForeignKey(OfferedFunds)
amount = models.IntegerField(default=0)
purchase_date = models.DateTimeField(auto_now_add=True)
def __int__(self):
return self.offered_fund.fund_name.name
我forms.py:
class InvestmentForm(forms.ModelForm):
class Meta:
model = Investment
fields = ('offered_fund','amount')
exclude = ['user']
终于,我的看法。 py:
def of_details(request, slug):
context_dict = {}
of = get_object_or_404(OfferedFunds, slug=slug)
context_dict['of'] = of
default_state = OfferedFunds.objects.get(slug=slug)
form = InvestmentForm(request.POST or None, initial={'offered_fund': default_state})
if form.is_valid():
instance = form.save(commit=False)
#instance.user = request.user
instance.offered_fund = default_state
instance.save()
instance.user.add(request.user) # Where the problem started
context_dict['form'] = form
return render(request, 'funds/offered-funds-details.html', context_dict)
在我的views.py中我有评论编辑导致这个问题的代码位。我无法想象为什么Django会疯狂,用户字段有一个值(非空)。任何人有任何想法,我如何解决这个问题?我没有一个python manage.py flush来清除我的数据库,但仍然没有运气。由于
被记录在用户查看哪些用户例如在'请求。?。用户' – Rohan
是的,用户登录后,我做了一个'print(“request.user”)'来检查。 – ng150716