Question

而不是显示我的表单错误，我得到错误页面说“异常值：列project_id，employee_id不是唯一的”。如何才能显示我的表单错误？（应该显示类似的内容：项目和员工组合已存在于成员资格中“）

模型：

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",),)

查看：

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

在返回表单之前，您可以捕获save对表单的调用和inject a custom error中抛出的异常。像这样（非常未经测试）：

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")

DJANGO：验证错误未显示在表单中

1 个答案: