Create recommendation system from values in Django template - django

Question

I'm trying to create a recommendation system in Django where I get the user with the highest rating. The rating is linked to the user as a Foreign-Key as seen in the code below:
models.py
class Bid(models.Model):
project = models.ForeignKey(
ProjectOrder, default="null", on_delete=models.CASCADE)
made_by = models.ForeignKey(
settings.AUTH_USER_MODEL,
null=True,
blank=True,
default="null",
on_delete=models.CASCADE
)
date = models.DateField(auto_now_add=True)
assign = models.BooleanField(default=False)
def __str__(self):
return self.project.title + " - " + self.made_by.username
class Meta:
ordering = ['-date']
class Rating(models.Model):
username = models.ForeignKey(User, on_delete=models.CASCADE)
score = models.IntegerField(default=0, validators=[
MaxValueValidator(5),
MinValueValidator(0),
])
review = models.TextField(max_length=250, blank=True, null=True)
reviewed_by = models.ForeignKey(User, on_delete=models.CASCADE,
blank=True,
null=True,
related_name="reviewed_by")
def __str__(self):
return str(self.username)
Template
{% for bid in client_bids_assign %}
<div
class="p-2 my-2 d-fle"
style="
border-radius: 10px;
gap: 10px;
box-shadow: 0 0.5px 2px rgba(128, 128, 128, 0.651);
"
>
<small id="">
<p class="badge bg-info">{{ bid.made_by }}</p>
<!-- star rating -->
<fieldset class="starability-result mx-auto" data-rating="{{rating}}">
Rated: {{rating}} stars
</fieldset>
<p class="text-muted">{{ bid.date }}</p>
</small>
<form method="POST">
{% csrf_token %}
<fieldset class="d-none">
<input type="text" name="bidId" id="bidId" value="{{ bid.id }}" />
</fieldset>
{% if bid.assign is False %}
<button
class="btn btn-sm btn-outline-success"
type="submit"
value="{{ bid.id }}"
>
Assign <i class="fa fa-check-circle"></i>
</button>
{% else %}
<button
class="btn btn-sm btn-outline-danger"
type="submit"
value="{{ bid.id }}"
>
Un-assign <i class="fa fa-exclamation-circle"></i>
</button>
{% endif %}
</form>
</div>
{% endfor %}
I am using a class based view therefore, this is how I get the rating.
this is a DetailView that handles a POST request and some other functionalities.
Views.py
class ProjectDetailView(LoginRequiredMixin, UserPassesTestMixin, DetailView):
model = ProjectOrder
#....
def test_func(self):
usergroup = None
usergroup = self.request.user.groups.values_list(
'name', flat=True).first()
if usergroup == "Writers" or usergroup == "Admin" or usergroup == "Clients":
return True
return False
# Get detail template according to user.
def get_template_names(self):
usergroup = None
usergroup = self.request.user.groups.values_list(
'name', flat=True).first()
if usergroup == "Writers":
return ["writer/projectorder_detail.html"]
elif usergroup == "Clients" or usergroup == "Admin":
return ["client/projectorder_detail.html"]
else:
return HttpResponseBadRequest("You are not allowed to access this page")
def get_context_data(self, **kwargs):
context = super(ProjectDetailView, self).get_context_data(**kwargs)
project = self.get_object()
user = self.request.user
client_bids = Bid.objects.filter(project__id=project.id)
client_bids_assign = Bid.objects.filter(
project__id=project.id, assign=True)
#get the rating of the user from the bid
def get_rating():
for bid in client_bids_assign:
user = bid.made_by #this user need to come from the bid inside the loop on the template
rating = user.rating_set.all()
agg = 0
count = 0
for rating in rating:
agg = agg + rating.score
count += 1
rating = agg/count
return rating
context.update({
'bForm': BidForm,
'client_bids': client_bids,
'client_bids_assign': client_bids_assign,
'rating': get_rating()
})
return context
# Post request handler (Bid form)
def post(self, request, *args, **kwargs):
bform = BidForm(request.POST)
# bidForm section
if bform.is_valid():
project = self.get_object()
bids = project.bid_set.all()
if bids.exists():
for bid in bids:
if bid.made_by == request.user:
bid.delete()
messages.info(request, "Bid reverted successfully")
else:
try:
new_bform = bform.save(commit=False)
new_bform.project = self.get_object()
new_bform.made_by = self.request.user
new_bform.save()
messages.success(
request, "Your bid has been submitted successfully")
except:
messages.error(
request, "Bid sending error, Try again later")
else:
try:
new_bform = bform.save(commit=False)
new_bform.project = self.get_object()
new_bform.made_by = self.request.user
new_bform.save()
messages.success(
request, "Your bid has been submitted successfully")
except:
messages.error(
request, "Bid sending error, Try again later")
context.update({
'bForm': BidForm,
'client_bids': client_bids,
'client_bids_assign': client_bids_assign,
'rating': get_rating()
})
# check usergroup to return appropriate page client/writer
if usergroup == "Writers":
return render(request, "writer/projectorder_detail.html", context)
else:
return render(request, "client/projectorder_detail.html", context)
my problem is that I can't seem to be able to get the user that submitted the bid from the template to be the user in the view whose rating I want to get. I have also tried having the mathematical operations in the template but this is not best practice and it seems to break the template i.e. parse error
Note: The Bid in the template loops through the current bids made
Thanks in advance.