Question

我希望我的表单检查PostgreSQL中是否已经存在相同的名称和日期，所以它不会产生重复。

models.py：

class Event(models.Model):
  week = models.DateField(blank=False)
  name = models.ForeignKey(Employee, default=None, on_delete=models.CASCADE)
  sunday = models.CharField(max_length=50, default=None, null=True)
  monday = models.CharField(max_length=50)
  tuesday = models.CharField(max_length=50)
  wednesday = models.CharField(max_length=50)
  thursday = models.CharField(max_length=50)
  friday = models.CharField(max_length=50)
  saturday = models.CharField(max_length=50, default=None, null=True)

  def __str__(self):
    return self.week

views.py：

def test2(request):
  locationList = Location.objects.all().order_by('name') #Pulls location data from location table
  clientList = Client.objects.all().order_by('name') #Pull client data from client table

  if request.method == 'POST':
    form1 = EventForm2(request.POST) #Displays form to be filled out by user
    if form1.is_valid():
      event = form1.save() #Saves form if valid data is entered
      messages.info(request, 'Successfully added')
      return HttpResponseRedirect(reverse('test2')) #Refreshes page to default
    else:
      form1 = EventForm2() #Form remains the same until valid data has been entered
      eventList = Event.objects.all().order_by('week', 'name')

  return render(request, 'app/test2.html', { # brings all the data into selected html
    "form": form1,
    "locationList": locationList,
    "clientList": clientList,
    "eventList": eventList,
  })

因此，例如2019年1月27日;鲍勃·迪伦（Bob Dylan）已存在于数据库中，该表格将无法提交

Answer 1

在视图中，您可以执行以下操作：

name = form1.cleaned_data['name']
week = form1.cleaned_data['week']
E = Event.objects.filter(name=name, week=week)

因此，如果len（e）> 0，则数据库中存在一个具有相同数据的对象

如果len（E）== 0：然后根据需要添加

提交表单时检查字段数据的组合是否存在

1 个答案: