嗨我在保存时遇到重复对象的问题。 我怎么能防止这种情况?
提前致谢。
#models.py
class Candidate(models.Model):
user = models.OneToOneField(User, primary_key=True)
birth = models.CharField(max_length=50)
...
class Job(models.Model):
candidate = models.ManyToManyField('Candidate', through='CandidateToJob')
title = models.CharField(max_length=500)
...
class CandidateToJob(models.Model):
job = models.ForeignKey(Job, related_name='applied_to')
candidate = models.ForeignKey(Candidate, related_name='from_user')
STATUS_CHOICES = (
('1', 'Not approved'),
('2', 'Approved'),
('3', 'Hired')
)
status = models.CharField(max_length=2, choices=STATUS_CHOICES)
class Meta:
unique_together = ("candidate", "job")
这是视图
#views.py
class JobDetails(generic.DetailView):
model = Job
template_name = 'companies/job-detail.html'
form_class = ApplyForm
def get_context_data(self, **kwargs):
context = super(JobDetails, self).get_context_data(**kwargs)
context['company_detail'] = Company.objects.all()
return context
def post(self, request, *args, **kwargs):
form = self.form_class(request.POST)
messages.success(request, 'Sucesso!')
if form.is_valid():
form.save(commit=False)
#create job
job = self.get_object(queryset=Job.objects.all())
#create candidate
candidate = Candidate.objects.get(pk=request.user)
#assign to the through table
candidatetojob = CandidateToJob.objects.create(job=job, candidate=candidate)
candidatetojob.save()
return HttpResponseRedirect('/jobs/')
表格
#forms.py
class ApplyForm(ModelForm):
class Meta:
model = CandidateToJob
exclude = ['candidate', 'job', 'status']
尽管unique_together,该函数总是保存复制它们的对象。
答案 0 :(得分:2)
我得到了它的工作。这是我的代码:
def post(self, request, *args, **kwargs):
form = self.form_class(request.POST)
#create job
job = self.get_object(queryset=Job.objects.all())
#create candidate
candidate = Candidate.objects.get(pk=request.user)
#check if objects exists before save
if CandidateToJob.objects.filter(job = job, candidate = candidate).exists():
messages.error(request, 'You have applied already for this position')
return HttpResponseRedirect(reverse('jobdetail', kwargs={'pk': job.pk}))
else:
if form.is_valid():
form.save(commit=False)
#assign to the through table
candidatetojob = CandidateToJob.objects.create(job=job, candidate=candidate, status='0')
candidatetojob.save()
messages.success(request, 'Success! Good luck.')
return HttpResponseRedirect('/jobs/')