After i posted my comment and deside to refresh the page it adds the same comment over and over on every refresh how can i stop this?
The code for the comment review is at the far bottom in the template.html. And the review code is under "def product_detail" in the views.py
Hope someone can give me some tips so if i refresh it dosent do another post.
template
{% extends "base.html" %}
{% load static %}
{% block page_header %}
<div >
<div >
<div ></div>
</div>
</div>
{% endblock %}
{% block content %}
<div ></div>
<div >
<div >
<div >
<div >
{% if product.image %}
<a href="{{ product.image.url }}" target="_blank">
<img src="{{ product.image.url }}" alt="{{ product.name }}">
</a>
{% else %}
<a href="">
<img src="{{ MEDIA_URL }}noimage.png" alt="{{ product.name }}">
</a>
{% endif %}
</div>
</div>
<div >
<div >
<p >{{ product.name }}</p>
<p >${{ product.price }}</p>
{% if product.category %}
<p >
<a href="{% url 'products' %}?category={{ product.category.name }}">
<i ></i>{{ product.category.friendly_name }}
</a>
</p>
{% endif %}
{% if product.get_rating > 0 %}
<small ><i ></i>{{ product.get_rating }} / 5</small>
{% else %}
<small >No Rating</small>
{% endif %}
{% if request.user.is_superuser %}
<small >
<a href="{% url 'edit_product' product.id %}">Edit</a> |
<a href="{% url 'delete_product' product.id %}">Delete</a>
</small>
{% endif %}
<p >{{ product.description }}</p>
<form action="{% url 'add_to_bag' product.id %}" method="POST">
{% csrf_token %}
<div >
{% with product.has_sizes as s %}
{% if s %}
<div >
<p><strong>Size:</strong></p>
<select name="product_size" id='id_product_size'>
<option value="xs">XS</option>
<option value="s">S</option>
<option value="m" selected>M</option>
<option value="l">L</option>
<option value="xl">XL</option>
</select>
</div>
{% endif %}
<div >
<p ><strong>Quantity:</strong></p>
<div >
<div >
<div >
<button
data-item_id="{{ product.id }}" id="decrement-qty_{{ product.id }}">
<span >
<i ></i>
</span>
</button>
</div>
<input type="number"
name="quantity" value="1" min="1" max="99"
data-item_id="{{ product.id }}"
id="id_qty_{{ product.id }}">
<div >
<button
data-item_id="{{ product.id }}" id="increment-qty_{{ product.id }}">
<span >
<i ></i>
</span>
</button>
</div>
</div>
</div>
</div>
<div >
<a href="{% url 'products' %}" >
<span >
<i ></i>
</span>
<span >Keep Shopping</span>
</a>
<input type="submit" value="Add to Bag">
</div>
<input type="hidden" name="redirect_url" value="{{ request.path }}">
{% endwith %}
</div>
</form>
</div>
</div>
</div>
<div >
<h2 >Reviews</h2>
{% if request.user.is_authenticated %}
<form method="post" action="." >
{% csrf_token %}
<div>
<label>Rating</label><br>
<select name="rating">
<option value="1">1</option>
<option value="2">2</option>
<option value="3" selected>3</option>
<option value="4">4</option>
<option value="5">5</option>
</select>
</div>
<div >
<label for="comment">Comment</label>
<textarea rows="5" id="comment" name="content"></textarea>
</div>
<button type="submit" >Submit</button>
</form>
{% endif %}
{% for review in reviews %}
<div >
<strong>Author:</strong> {{ review.created_by }}<br>
<strong>Rating:</strong> {{ review.rating }}/5<br>
<strong>Date:</strong> {{ review.created_at|date:"Y-m-d" }}<br>
<strong>Comment:</strong><br>
{{ review.content }}
</div>
{% endfor %}
</div>
</div>
{% endblock %}
{% block postloadjs %}
{{ block.super }}
{% include 'products/includes/quantity_input_script.html' %}
{% endblock %}
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
# Create your views here.
def all_products(request):
""" A view to show all products, including sorting and search queries """
products = Product.objects.all()
query = None
categories = None
sort = None
direction = None
if request.GET:
if 'sort' in request.GET:
sortkey = request.GET['sort']
sort = sortkey
if sortkey == 'name':
sortkey = 'lower_name'
products = products.annotate(lower_name=Lower('name'))
if sortkey == 'category':
sortkey = 'category__name'
if 'direction' in request.GET:
direction = request.GET['direction']
if direction == 'desc':
sortkey = f'-{sortkey}'
products = products.order_by(sortkey)
if 'category' in request.GET:
categories = request.GET['category'].split(',')
products = products.filter(category__name__in=categories)
categories = Category.objects.filter(name__in=categories)
if 'q' in request.GET:
query = request.GET['q']
if not query:
messages.error(request, "You didn't enter any search criteria!")
return redirect(reverse('products'))
queries = Q(name__icontains=query) | Q(description__icontains=query)
products = products.filter(queries)
current_sorting = f'{sort}_{direction}'
context = {
'products': products,
'search_term': query,
'current_categories': categories,
'current_sorting': current_sorting,
}
return render(request, 'products/products.html', context)
def product_detail(request, product_id):
""" A view to show individual product details """
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 = Review.objects.create(
product=product,
rating=rating,
content=content,
created_by=request.user
)
reviews = Review.objects.filter(product=product)
context = {
'product': product,
'reviews': reviews
}
return render(request, 'products/product_detail.html', context)
@login_required
def add_product(request):
""" Add a product to the store """
if not request.user.is_superuser:
messages.error(request, 'Sorry, only store owners can do that.')
return redirect(reverse('home'))
if request.method == 'POST':
form = ProductForm(request.POST, request.FILES)
if form.is_valid():
product = form.save()
messages.success(request, 'Successfully added product!')
return redirect(reverse('product_detail', args=[product.id]))
else:
messages.error(request, 'Failed to add product. Please ensure the form is valid.')
else:
form = ProductForm()
template = 'products/add_product.html'
context = {
'form': form,
}
return render(request, template, context)
@login_required
def edit_product(request, product_id):
""" Edit a product in the store """
if not request.user.is_superuser:
messages.error(request, 'Sorry, only store owners can do that.')
return redirect(reverse('home'))
product = get_object_or_404(Product, pk=product_id)
if request.method == 'POST':
form = ProductForm(request.POST, request.FILES, instance=product)
if form.is_valid():
form.save()
messages.success(request, 'Successfully updated product!')
return redirect(reverse('product_detail', args=[product.id]))
else:
messages.error(request, 'Failed to update product. Please ensure the form is valid.')
else:
form = ProductForm(instance=product)
messages.info(request, f'You are editing {product.name}')
template = 'products/edit_product.html'
context = {
'form': form,
'product': product,
}
return render(request, template, context)
@login_required
def delete_product(request, product_id):
""" Delete a product from the store """
if not request.user.is_superuser:
messages.error(request, 'Sorry, only store owners can do that.')
return redirect(reverse('home'))
product = get_object_or_404(Product, pk=product_id)
product.delete()
messages.success(request, 'Product deleted!')
return redirect(reverse('products'))
CodePudding user response：
You should implement the Post/Redirect/Get architectural pattern [wiki], and thus return a redirect such that the browser will make a GET request next, and thus prevent making another POST request when refreshing the page:
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