python - 如何在发表评论后重定向我的用户

Question

所以我刚刚学会了如何在我的博客上添加评论。现在的问题是我无法将我的用户重定向到相关的博客文章。这真的很令人沮丧，因为我在互联网上看到很多人谈论 get_absolute_url 这让我很困惑。

from django.shortcuts import render, redirect
from django.http import HttpResponse
from .models import Annonce, Comments
from django.shortcuts import get_object_or_404
from django.core.paginator import Paginator

def annonceView(request, annonce_id):
    annonce = get_object_or_404(Annonce, pk=annonce_id)
    comments = Comments.objects.filter(auteur=annonce_id)
    if request.method == "POST":
        content = request.POST["add_comment"]
        if content:
        new_comment = Comments.objects.create(content=content, auteur=annonce)
        new_comment.save()
        return redirect(annonce)

    context = {
        "annonce": annonce,
        "comments": comments,
    }

    return render(request, "annonces/annonce.html", context)

Answer 1

您是正确的，您可以使用 get_absolute_url [Django-doc]这里。您可以将此类方法添加到模型中，例如:

# app/models.py

from django.db import models
from django.urls import <b>reverse</b>

class Annonce(models.Model):

    # ...

    def <b>get_absolute_url</b>(self):
        return reverse('annonce_detail', kwargs={'pk': self.pk})

这里 annonce_detail 是假设 View 的名称，因此在您的 urls.py 中，我们有一个如下路径:

# app/urls.py

from django.urls import path
from app import views

urlpatterns = [
    path('annonce/<int:pk>', views.annonce_detail, name=<b>'annonce_detail'</b>),
    # ...
]

这意味着对于给定的 Annonce 对象，我们可以询问 some_annonce.get_absolute_url()，它会返回类似 /annonce/123.

现在redirect [Django-doc]考虑带有 get_absolute_url 的模型对象。事实上，正如文档所说:

Returns an HttpResponseRedirect to the appropriate URL for the arguments passed.

The arguments could be:

• A model: the model's get_absolute_url() function will be called.
• A view name, possibly with arguments: reverse() will be used to reverse-resolve the name.
• An absolute or relative URL, which will be used as-is for the redirect location.

By default issues a temporary redirect; pass permanent=True to issue a permanent redirect.

如果您在该模型上定义了这样的get_absolute_url，则可以将该对象传递给redirect，例如:

def annonceView(request, annonce_id):
    annonce = get_object_or_404(Annonce, pk=annonce_id)
    comments = Comments.objects.filter(auteur=annonce_id)
    if request.method == "POST":
        content = request.POST["add_comment"]
        if content:
        new_comment = Comments.objects.create(content=content, auteur=annonce)
        new_comment.save()
        return <b>redirect(annonce)</b>

    context = {
        "annonce": annonce,
        "comments": comments,
    }

    return render(request, "annonces/annonce.html", context)

Note: models typically have singular names, so Comment, not Comments.

 

Note: you might want to consider working with forms [Django-doc] since the given input is not per se valid, and a form can do proper validation, as well as removing a lot of boilerplate code.