DJANGO : 양식에 유효성 검사 오류가 표시되지 않습니다.

Question

양식 오류를 표시하는 대신 "예외 값 : 열 project_id, employee_id가 고유하지 않습니다"라는 오류 페이지가 표시됩니다. 대신 양식 오류를 표시하려면 어떻게해야합니까?

모델 : (프로젝트 및 직원 조합 이미 회원에 존재하는 "과 같이 표시되어야합니다) :

class Project(models.Model): 
    projecttype = models.ForeignKey(Projecttype) 
    department = models.ForeignKey(Department) 
    members = models.ManyToManyField(Employee, through='Membership') 
    def __unicode__(self): 
     return self.projecttype.name 

class Membership(models.Model): 
    project = models.ForeignKey(Project) 
    department = models.ForeignKey(Department) 
    employee = models.ForeignKey(Employee) 
    role = models.ManyToManyField(Role, blank=True, null=True) 
    class Meta: 
     unique_together = (("program", "employee",),) 

보기 :

def employee_edit(request, employee_id): 
    i = get_object_or_404(Employee, pk=employee_id) 
    MembershipForm = make_membership_form(i) 
    MembershipFormSet = modelformset_factory(Membership, form=MembershipForm) 
    f = MembershipFormSet(queryset=Membership.objects.filter(employee=i),) 
    if request.method == "POST": 
     f = MembershipFormSet(request.POST) 
     m = f.save(commit=False) 
     for instances in m: 
      instances.employee = i 
      instances.department = i.department 
     if f.is_valid(): 
      instances.save() 
      f.save_m2m() 
    return render_to_response('testdb/edit.html', {'item': i, 'formset': f, }, context_instance=RequestContext(request)) 

def make_membership_form(i): 
    class MembershipForm(forms.ModelForm): 
     project = forms.ModelChoiceField(queryset=Project.objects.filter(department=i.department)) 
     class Meta: 
      model = Membership 
      exclude = ('department', 'employee') 
      unique_together = (("project", "employee",),) 
    return MembershipForm 

Answer 1

당신은 예외가에 save 호출에 던져지지 잡을 수 있습니다 양식과 inject a custom error을 반환하기 전에 양식에 입력하십시오. (매우 테스트되지 않음) :

from django.db import IntegrityException 
... 
formset = MembershipFormSet(request.POST) 
for form in formset: 
    try: 
     form.save(commit=False) 
    catch IntegrityException: 
     errors = form._errors.setdefault("field", ErrorList()) 
     errors.append(u"error")