Class-based-views - 使用 FormView 将多个模型组合在一起

Question

我正在尝试构建一个调查应用程序。我已经为调查、问题、响应定义了一个模型，如下所示。

我想做的是创建一个调查（在管理员中，我可以做）然后将此调查显示为用户可以填写的页面。

我是第一次使用 Class 基于视图，我对如何呈现调查表单以及相关问题并允许输入答案感到困惑。

在管理员中，我创建了一个调查并成功地向其中添加了问题。 FormView（和 UpdateView，尝试作为另一个 SO 答案的一部分）允许我显示 Survey 模型的 'name' 和 'description' 属性 - 但问题没有出现。

我需要做什么才能使调查及其问题在我的表单中可用（并允许用户输入回复）？

型号

class Survey(models.Model):
    name = models.CharField(max_length=400)
    description = models.TextField()

    def survey_questions(self):
        if self.pk:
            return Question.objects.filter(survey=self.pk)
        else:
            return None

    def publish(self):
        self.published_date = timezone.now()
        self.save()

class Question(models.Model):
    survey = models.ForeignKey(Survey, on_delete=models.CASCADE)
    question = models.TextField()

class Response(models.Model):
    member = models.ForeignKey(user_model, on_delete=models.SET_NULL, null=True, blank=True)
    survey = models.ForeignKey(Survey, on_delete=models.CASCADE)
    created = models.DateTimeField(auto_now_add=True)
    updated = models.DateTimeField(auto_now_add=True)

class AnswerBase(models.Model):
    question = models.ForeignKey(Question, on_delete=models.CASCADE)
    response = models.ForeignKey(Response, on_delete=models.CASCADE)
    created = models.DateTimeField(auto_now_add=True)
    updated = models.DateTimeField(auto_now=True)

class AnswerText(AnswerBase):
    body = models.TextField(blank=True, null=True)

网址

urlpatterns = [path('survey/<int:pk>/', views.SurveyResponseView.as_view(), name='survey_detail')]

观看次数

class SurveyResponseView(FormView):
    template_name = 'survey/survey_detail.html'
    form_class = ResponseForm

表格

class ResponseForm(forms.ModelForm):

    class Meta():
        model = Survey
        fields = '__all__'

Answer 1

好的，方法是使用 FormSets. They're a bit of a faff to setup, but shouldn't take you too long. I recommend using this small js library to help。

我还重写了您的一些代码，希望能让您的生活更轻松一些：

models.py

class SurveyTemplate(models.Model):
    name = models.CharField(max_length=400)
    description = models.TextField()
    # You were missing this I believe
    published_date = models.DateTimeField(blank=True, null=True)

    def publish(self):
        self.published_date = timezone.now()
        self.save()


class Question(models.Model):
    # Now you can do SurveyTemplate.questions.all()
    survey = models.ForeignKey(Survey, on_delete=models.CASCADE, related_name='questions')
    question = models.TextField()


class SurveyResponse(models.Model):
    member = models.ForeignKey(user_model, on_delete=models.SET_NULL, null=True, blank=True)
    survey = models.ForeignKey(Survey, on_delete=models.CASCADE)
    created = models.DateTimeField(auto_now_add=True)
    updated = models.DateTimeField(auto_now_add=True)


class Answer(models.Model):
    # Now you can do Question.answers.all()
    question = models.ForeignKey(Question, on_delete=models.CASCADE, related_name='answers')
    # Now you can do Response.answers.all()
    response = models.ForeignKey(Response, on_delete=models.CASCADE, related_name='answers')
    created = models.DateTimeField(auto_now_add=True)
    updated = models.DateTimeField(auto_now=True)

views.py

from django.views.generic import CreateView


# CreateView is Django's built in View for creating an object, you would be best to use it
class SurveyResponseView(CreateView):
    model = Survey
    template = 'survey/survey_detail.html'
    form_class = ResponseForm

forms.py

class ResponseForm(forms.ModelForm):
    class Meta():
        model = Survey
        fields = '__all__'

Class-based-views - 使用 FormView 将多个模型组合在一起

Class-based-views - Pulling together multiple models using FormView

forms

django

django-class-based-views