Django:创建与管理界面类似的内联表单集

Question

我是一个Django新手,我有一个关于在生产代码中重用管理界面的内联formset的问题.考虑以下模型:

class Attribute(models.Model):
    name       = models.CharField(max_length=50)

class Person(models.Model):
    lastName   = models.CharField(max_length=50)
    firstName  = models.CharField(max_length=50)
    email      = models.CharField(max_length=50)
    attributes = models.ManyToManyField(Attribute, through='AttributeValue')

class AttributeValue(models.Model):
    person     = models.ForeignKey(Person, on_delete=models.CASCADE)
    attribute  = models.ForeignKey(Attribute, on_delete=models.PROTECT)
    isConsumer = models.BooleanField()
    value      = models.CharField(max_length=50)

这个管理界面出来很漂亮.我使用了以下admin.py:

class AttributeValueInline(admin.TabularInline):
    model = AttributeValue
    extra = 3

class PersonAdmin(admin.ModelAdmin):
    list_display = ('lastName', 'firstName','email')
    fieldsets = [
       ('Name',        {'fields': ['firstName', 'lastName']}),
       ('Contact Info',{'fields': ['email','phoneNumber']})
    ]
    inlines = [AttributeValueInline]

admin.site.register(Person, PersonAdmin)
admin.site.register(Attribute)

这几乎就是我想要的.它看起来像这样:

当我尝试在非管理员网站中实现相同的功能时,除了实际的业务逻辑之外,我还必须编写相当多的代码来执行内联表单集,表单处理.除此之外,我还遇到了这里提到的问题.

我无法将管理界面暴露给最终用户,因为我们需要一个自定义的网页设计和页面流.但是,我可以重用部分管理界面代码而不是重新实现相同的功能吗？

任何其他减少代码的建议都是最受欢迎的.

Answer 1

这是如何在 Django 管理中实现内联表单集的答案 http://kevindias.com/writing/django-class-based-views-multiple-inline-formsets/ 但是只描述了 CreateWiew。如果你还想实现 UpdateView，你需要做一些调整来复制你的代码

def get(self, request, *args, **kwargs):
    """
    Handles GET requests and instantiates blank versions of the form
    and its inline formsets.
    """
    self.object = self.get_object()
    form_class = self.get_form_class()
    form = self.get_form(form_class)
    sample_form = SampleFormSet(instance=self.object)
    return self.render_to_response(
        self.get_context_data(form=form,
                              sample_form=sample_form))

def post(self, request, *args, **kwargs):
    """
    Handles POST requests, instantiating a form instance and its inline
    formsets with the passed POST variables and then checking them for
    validity.
    """
    self.object = self.get_object()
    form_class = self.get_form_class()
    form = self.get_form(form_class)
    sample_form = SampleFormSet(self.request.POST, instance=self.object)
    if (form.is_valid() and sample_form.is_valid()):
        return self.form_valid(form, sample_form)
    else:
        return self.form_invalid(form, sample_form)

def form_valid(self, form, sample_form):
    """
    Called if all forms are valid. Creates a Recipe instance along with
    associated Ingredients and Instructions and then redirects to a
    success page.
    """
    self.object = form.save()
    sample_form.save()
    return HttpResponseRedirect(self.get_success_url())

并且不要忘记将 DELETE formset 字段添加到您的模板中

          {% for form in sample_form %}
          {{ form.id }}
          <div class="inline {{ sample_form.prefix }}">
              {{ form.description.errors }}
              {{ form.description.label_tag }}
              ...
              {{ form.DELETE }}
          </div>
          {% endfor %}