Pre-populate 将字段插入到 Django 站点的表单字段中

Question

我创建了一个用于在网站上发布 post 的表单。在模型中有一个 SlugField，它是 admin.py 中的一个 pre-populated 字段，用于 post.

的标题

forms.py

class TestPostModelForm(forms.ModelForm):
    title = forms.CharField(
                max_length=70,
                label="Titolo",
                help_text="Write post title here. The title must be have max 70 characters",
                widget=forms.TextInput(attrs={"class": "form-control form-control-lg"}),
                )
    slug_post = forms.SlugField(
                    max_length=70,
                    label="Slug",
                    help_text="Slug is a field in autocomplete mode, but if you want you can modify its contents",
                    widget=forms.TextInput(attrs={"class": "form-control form-control-sm"}),
                    )
.....
    class Meta:
        model = TestPostModel
        fields = [
                "title",
                "slug_post",
                "description",
                "contents",
....
                ]

如果我从管理面板创建一个 post，则 slug 会自动正确填充，但如果我从表单创建一个 post，则不会发生同样的事情。在第二种情况下，创建了 post 但 slug 字段仍然为空。

我读到我必须使用 slugify 在我的表单中创建一个 pre-populated 字段，但我不清楚我可以用哪种方法来做到这一点。

我可以举个例子吗？

Answer 1

这是示例，在您的 views.py

form = PostForm(request.POST):
   if form.is_valid():
     post = form.save(commit=False)
     post.slug = slugify(post.title)
     post.save()
    ...

Answer 2

关于 coderasha 指示的一些精确说明：从表单中删除 slug 字段很重要。

就我而言：

class TestPostModelForm(forms.ModelForm):
    title = forms.CharField(
                max_length=70,
                label="Titolo",
                help_text="Write post title here. The title must be have max 70 characters",
                widget=forms.TextInput(attrs={"class": "form-control form-control-lg"}),
                )

.....
    class Meta:
        model = TestPostModel
        fields = [
                "title",
                "description",
                "contents",
....
                ]

Answer 3

class Post(models.Model):
    title = models.CharField(max_length=150)
    image = models.ImageField(upload_to='images/', blank=True)
    date_created = models.DateTimeField(auto_now_add=True)
    slug = models.SlugField(unique=True)

def pre_save_slugify_receiver(sender, instance, *args, **kwargs):
    slug = slugify(instance.title)
    instance.slug = slug

pre_save.connect(pre_save_slugify_receiver, sender=Post)

Answer 4

只是想加上我的两分钱，因为我自己也在努力解决这个问题，因为自动获得了 slug。以下是 forms.py 和 views.py 中的示例。 if "POST" 部分是 return 回到首页。否则出示表格。

forms.py

class PostForm(forms.ModelForm):
    class Meta:
        model = Post
        fields = ['title', 'intro','body', 'status']

其中 Post 的模型有许多其他字段，例如 'slug'、'published'、'created'、'updated' 等

views.py

def add_post(request):
    if request.method == 'POST':
        #a post was added
        post_form = PostForm(data=request.POST)
        if post_form.is_valid():
            #create a post object but don't save to database yet
            new_post = post_form.save(commit=False)
            #assign the current slug and user to the post
            new_post.author = request.user
            new_post.slug = slugify(new_post.title)
            #save post to database
            new_post.save()
            return HttpResponsePermanentRedirect(reverse('blog:post_list'))
    else:
        post_form = PostForm()
        return render(request, 'blog/post/add_post.html', {'post_form': post_form})

要访问模板中的表单，您可以使用以下命令。

HTML

<form method="post">
    {{ post_form.as_p }}
    {% csrf_token %}
    <p><input type="submit" value="Post" style="cursor: pointer;"></p>
</form>

Pre-populate 将字段插入到 Django 站点的表单字段中

Pre-populate slug field into a form field of a Django site

django

django-forms

slug

django-2.1