Django:子模型编辑注释无效

Question

当我按下模板中的编辑注释时，我的编辑注释出现了问题，没有错误，但是被重定向到同一页的顶部。有人知道我怎样才能让它让我编辑评论吗？

这篇文章只编辑了所需的代码，我修复了之前的删除注释，这样代码就被删除了.

这是我的代码：

views.py:

from django.shortcuts import render, redirect, reverse, get_object_or_404
from django.contrib import messages
from django.contrib.auth.decorators import login_required
from django.db.models import Q
from django.db.models.functions import Lower

from .models import Product, Category, Review
from .forms import ProductForm, ReviewForm




def product_detail(request, product_id):
    product = get_object_or_404(Product, pk=product_id)
    if request.method == 'POST':
        rating = request.POST.get('rating', 3)
        content = request.POST.get('content', '')
        Review.objects.create(
            product=product,
            rating=rating,
            content=content,
            created_by=request.user
        )
        # redirect to the same page
        return redirect('product_detail', product_id=product_id)

    reviews = Review.objects.filter(product=product)
    context = {
        'product': product,
        'reviews': reviews
    }
    return render(request, 'products/product_detail.html', context)





 @login_required
def edit_review(request, review_id):
    """
    Saves review form edited by user
    """
    review = get_object_or_404(Review, pk=review_id)
    product = Product.objects.get(name=review.product)
    if request.method == 'POST':
        review_form = ReviewForm(request.POST or None, instance=review)
        if review_form.is_valid():
            review_form.save()
            messages.success(request, 'Successfully updated product!')
            return redirect(reverse('product_detail', args=[product.id]))

        # Success message if added
        messages.success(request, 'Thank You! Review was edited')
    else:
        # Error message if form was invalid
        messages.error(request, 'Something went wrong. '
                                'Make sure the form is valid.')

    form = ReviewForm(instance=review)
    messages.info(request, f'You are editing {review_id}')

    template = 'products/edit_review.html'
    context = {
        'form': form,
        'product': review,
    }
    return redirect(reverse('product_detail', args=[product.id]))

models.py:

from django.db import models
from django.contrib.auth.models import User





class Review(models.Model):
    product = models.ForeignKey(Product, related_name='reviews', on_delete=models.CASCADE)
    rating = models.IntegerField(default=3)
    content = models.TextField()
    created_by = models.ForeignKey(User, related_name='reviews', on_delete=models.CASCADE)
    created_at = models.DateTimeField(auto_now_add=True)

    def __str__(self):
        return '%s - %s' % (self.product.name, self.created_by)

urls.py:

from django.urls import path
from . import views

urlpatterns = [
    path('', views.all_products, name='products'),
    path('<int:product_id>/', views.product_detail, name='product_detail'),
    path('add/', views.add_product, name='add_product'),
    path('edit/<int:product_id>/', views.edit_product, name='edit_product'),
    path('delete/<int:product_id>/', views.delete_product, name='delete_product'),
    path('delete_review/<int:review_id>/delete_review', views.delete_review, name='delete-review'),
    path('edit_review/<review_id>', views.edit_review, name="edit_review"),
]

forms.py:

from django import forms
from .widgets import CustomClearableFileInput
from .models import Product, Category, Review




class ReviewForm(forms.ModelForm):
    class Meta:
        model = Review
        fields = ('content', 'rating')
        widgets = {
            'content': forms.Textarea(attrs={'class': 'form-control'}),
            'rating': forms.Select(attrs={'class': 'form-control'}),
        }

edit_review.html模板

{% extends "base.html" %}
{% load static %}


{% block content %}
    <div class="overlay"></div>
    <div class="container">
        <div class="row">
            <div class="col-12 col-md-6">
                <hr>
                <h2 class="logo-font mb-4">Reviews</h2>
                <h5 class="text-muted">Edit you're Review</h5>
                <hr>
            </div>
        </div>

        <div class="row">
            <div class="col-12 col-md-6">
                <form method="POST" action="{% url 'edit_review' review.id %}" class="form mb-2" enctype="multipart/form-data">
                    {% csrf_token %}
                    {% for field in form %}
                        {% if field.name != 'image' %}
                            {{ field | as_crispy_field }}
                        {% else %}
                            {{ field }}
                        {% endif %}
                    {% endfor %}
                    <div class="text-right">
                        <a class="btn btn-outline-black rounded-0" href="{% url 'reviews' %}">Cancel</a>
                        <button class="btn btn-black rounded-0" type="submit">Update Review</button>
                    </div>
                </form>
            </div>
        </div>
    </div>
{% endblock %}

Answer 1

对于delete视图中的第一个问题，必须引用带有大写Review的模型

@login_required
def delete_review(request, review_id):
    review = Review.objects.filter(review_id).last()

对于第二个问题，您可以从Here看到有关此错误的详细信息以及如何处理该错误。