Question

我有几个型号：产品，评论和评论。产品有评论，评论有评论。我编写了如下代码：

class Comment(models.Model):
    author = models.CharField(max_length=50)
    content = models.TextField(max_length = 200)
    date = models.DateTimeField(auto_now_add=True, blank = True)

    def __unicode__(self):
        return '%s on %s' % (self.author, self.date)

class Review(models.Model):
    stars = models.FloatField()
    author = models.CharField(max_length = 50)
    title = models.CharField(max_length = 50)
    description = models.TextField(max_length = 500)
    date = models.DateTimeField(auto_now_add = True, blank = True)
    video = models.FileField(upload_to='upload', null = True, blank = True)
    image = models.FileField(upload_to='upload', null = True, blank = True)
    comments = models.ManyToManyField(Comment)

    def __unicode__(self):
        return '%s by %s' % (self.author, self.title)

class Product(models.Model):
    name = models.CharField(max_length=50)
    description = models.TextField(max_length = 500)
    image = models.FileField(upload_to='upload', null = True, blank = True)
    reviews = models.ManyToManyField(Review)

    def __unicode__(self):
        return '%s' % (self.name)

同样，我有基于模型的ModelForms，如下所示：

class CommentForm(forms.ModelForm):
    class Meta:
        model = Comment
        exclude = ['author']
        labels = {
            'content': _('Comment:'),
        }

class ProductForm(forms.ModelForm):
    class Meta:
        model = Product
        exclude = ['reviews']

class ReviewForm(forms.ModelForm):
    class Meta:
        model = Review
        exclude = ['author', 'comments']

直到这里，一切都很好。现在，我希望能够动态地向产品添加问题。因此，当管理员创建新产品时，他将能够向其添加特定于产品的问题（例如，产品的颜色等）（他想要多少问题 - 动态）。然后，当用户查看产品时，他会看到管理员提出的产品特定问题，并且他将能够回答这些问题。

所以，我的主要问题是：一个。如何动态地将字段添加到数据库模型？湾如何在评论中处理这些问题？一个产品可能会有多个评论，每个评论由不同的人进行，每个评论都应显示这些产品特定的问题。

谢谢！

Answer 1

为了给你一个快速举例说明我的评论（用记事本完成，也许有拼写错误）：

class Comment(models.Model):
    pass

class Review(models.Model):
    comments = models.ManyToManyField(Comment)

class Product(models.Model):
    reviews = models.ManyToManyField(Review)

class Question(models.Model):.
    content = models.TextField(max_length = 500)
    product = models.ForeignKey(Product)

class QuestionAnswer(models.Model):
    content = models.TextField(max_length = 500)
    review = models.ForeignKey(Review)
    question = models.ForeignKey(Question)

动态地将字段添加到Django中的ModelForm

1 个答案: