How can I show rating in product comments - django

Question

My models:
class Comment(models.Model):
product = models.ForeignKey(Product ,on_delete=models.CASCADE, related_name='comments')
user = models.ForeignKey(User ,on_delete=models.CASCADE, max_length=80, related_name='comments_user')
body = models.TextField()
created_on = jmodels.jDateField(auto_now_add=True)
created_on_time = models.TimeField(auto_now_add=True,null=True)
active = models.BooleanField(default=False)
class Meta:
ordering = ['created_on']
def __str__(self):
return 'Comment {} by {}'.format(self.body, self.user)
class Rating(models.Model):
product = models.ForeignKey(Product ,on_delete=models.CASCADE)
user = models.ForeignKey(User ,on_delete=models.CASCADE)
score = models.IntegerField(default=0,
validators=[
MaxValueValidator(5),
MinValueValidator(0),
]
)
def __str__(self):
return 'rate {} by {} for {}'.format(self.score, self.user, self.product)
In product single page, I have comments part that I want show user rating if that user put comment in next of username and comment date.
My views :
def product_details(request, category_url, subcategory_url, product_url):
product = get_object_or_404(Product, product_url=product_url)
stocks = Stock.objects.filter(product=product)
rate = Rating.objects.filter(product=product, user=request.user)
all_rates = Rating.objects.filter(product=product)
all_rate_count = Rating.objects.filter(product=product).count()
all_rate = sum([all_rate.score for all_rate in all_rates])
all_rate = all_rate/all_rate_count
all_rate = all_rate*100/5
comments = product.comments.filter(product=product, active=True)
if request.method == "POST":
body = request.POST['body']
new_comment = Comment(user=request.user,product=product, body=body)
new_comment.save()
message_good = "نظر شما با موفقیت ثبت شد بعد از برسی نمایش داده میشود!"
ctx = {'product':product, 'stocks':stocks, 'rate':rate, 'all_rate':all_rate,
'comments':comments,
'message_good':message_good,
'all_rate_count':all_rate_count}
return render(request, 'products/product_details.html', ctx)
ctx = {'product':product, 'stocks':stocks, 'rate':rate, 'all_rate':all_rate,
'comments':comments,
'all_rate_count':all_rate_count}
return render(request, 'products/product_details.html', ctx)
And my html :
{% for comment in comments %}
<div class="comments" style="padding: 10px;">
<p class="font-weight-bold">
{{ comment.user }}
<span class=" text-muted font-weight-normal">
{{ comment.created_on }}
</span>
<span class=" text-muted font-weight-normal">
{{ comment.created_on_time|date:"G:i" }}
</span>
</p>
{{ comment.body | linebreaks }}
</div>
{% endfor %}
I updated my codes, and showed my views and my single html
so if please can help me about showing product rate by user for each comment that filtered by user.
or any better suggestion for other ways about rating or showing comments for single product page. thanks for helping

Answer 1

I would add a unique_together constraint to enforce that a user can only leave a single rating for a product.
class Rating(models.Model):
product = models.ForeignKey(Product ,on_delete=models.CASCADE)
user = models.ForeignKey(User ,on_delete=models.CASCADE)
score = models.IntegerField(default=0,
validators=[
MaxValueValidator(5),
MinValueValidator(0),
]
)
class Meta:
unique_together = ('product', 'user')
def __str__(self):
return 'rate {} by {} for {}'.format(self.score, self.user, self.product)
In your views, since you will only have one rating for a product per user.
rate = Rating.objects.get(product=product, user=request.user)
In your templates:
{% for comment in comments %}
<div class="comments" style="padding: 10px;">
<p class="font-weight-bold">
{{ comment.user }}
<span class=" text-muted font-weight-normal">
{{ comment.created_on }}
</span>
<span class=" text-muted font-weight-normal">
{{ comment.created_on_time|date:"G:i" }}
</span>
</p>
{{ comment.body | linebreaks }}
{{ rate.score }}
</div>
{% endfor %}