We Keep Coding

Double post after refresh django

After I posted my comment and decided 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.
Can someone give me some tips so if I refresh it dosen't do another post?
template file:
{% extends "base.html" %}
{% load static %}
{% block page_header %}
<div class="container header-container">
<div class="row">
<div class="col"></div>
</div>
</div>
{% endblock %}
{% block content %}
<div class="overlay"></div>
<div class="container-fluid">
<div class="row">
<div class="col-12 col-md-6 col-lg-4 offset-lg-2">
<div class="image-container my-5">
{% if product.image %}
<a href="{{ product.image.url }}" target="_blank">
<img class="card-img-top img-fluid" src="{{ product.image.url }}" alt="{{ product.name }}">
</a>
{% else %}
<a href="">
<img class="card-img-top img-fluid" src="{{ MEDIA_URL }}noimage.png" alt="{{ product.name }}">
</a>
{% endif %}
</div>
</div>
<div class="col-12 col-md-6 col-lg-4">
<div class="product-details-container mb-5 mt-md-5">
<p class="mb-0">{{ product.name }}</p>
<p class="lead mb-0 text-left font-weight-bold">${{ product.price }}</p>
{% if product.category %}
<p class="small mt-1 mb-0">
<a class="text-muted" href="{% url 'products' %}?category={{ product.category.name }}">
<i class="fas fa-tag mr-1"></i>{{ product.category.friendly_name }}
</a>
</p>
{% endif %}
{% if product.get_rating > 0 %}
<small class="text-muted"><i class="fas fa-star mr-1"></i>{{ product.get_rating }} / 5</small>
{% else %}
<small class="text-muted">No Rating</small>
{% endif %}
{% if request.user.is_superuser %}
<small class="ml-3">
Edit |
<a class="text-danger" href="{% url 'delete_product' product.id %}">Delete</a>
</small>
{% endif %}
<p class="mt-3">{{ product.description }}</p>
<form class="form" action="{% url 'add_to_bag' product.id %}" method="POST">
{% csrf_token %}
<div class="form-row">
{% with product.has_sizes as s %}
{% if s %}
<div class="col-12">
<p><strong>Size:</strong></p>
<select class="form-control rounded-0 w-50" 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 class="col-12">
<p class="mt-3"><strong>Quantity:</strong></p>
<div class="form-group w-50">
<div class="input-group">
<div class="input-group-prepend">
<button class="decrement-qty btn btn-black rounded-0"
data-item_id="{{ product.id }}" id="decrement-qty_{{ product.id }}">
<span class="icon">
<i class="fas fa-minus"></i>
</span>
</button>
</div>
<input class="form-control qty_input" type="number"
name="quantity" value="1" min="1" max="99"
data-item_id="{{ product.id }}"
id="id_qty_{{ product.id }}">
<div class="input-group-append">
<button class="increment-qty btn btn-black rounded-0"
data-item_id="{{ product.id }}" id="increment-qty_{{ product.id }}">
<span class="icon">
<i class="fas fa-plus"></i>
</span>
</button>
</div>
</div>
</div>
</div>
<div class="col{% if s %}-12 mt-2{% endif %}">
<a href="{% url 'products' %}" class="btn btn-outline-black rounded-0 mt-5">
<span class="icon">
<i class="fas fa-chevron-left"></i>
</span>
<span class="text-uppercase">Keep Shopping</span>
</a>
<input type="submit" class="btn btn-black rounded-0 text-uppercase mt-5" value="Add to Bag">
</div>
<input type="hidden" name="redirect_url" value="{{ request.path }}">
{% endwith %}
</div>
</form>
</div>
</div>
</div>
<div class="w-full mt-6">
<h2 class="text-xl">Reviews</h2>
{% if request.user.is_authenticated %}
<form method="post" action="." class="mt-6 mb-6 p-6 bg-gray-100 rounded-xl">
{% csrf_token %}
<div>
<label>Rating</label><br>
<select class="form-control" 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 class="form-group">
<label for="comment">Comment</label>
<textarea class="form-control" rows="5" id="comment" name="content"></textarea>
</div>
<button type="submit" class="btn btn-primary mb-2">Submit</button>
</form>
{% endif %}
{% for review in reviews %}
<div class="px-4 py-6 bg-gray-100 rounded-xl mb-4">
<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'))

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 🖟
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)

django.db.utils.OperationalError: no such column: home_post.assign_to_id

I want to assign a task to one of the users who commented on the post. But when I try to go on post_detail.html an error occurs, and i.e.
OperationalError at /home/
no such column: home_post.assign_to_id
PS: I have done python manage.py makemigrations and python manage.py migrate
So, here is the code snippet. I can give more information if needed. Thanks in advance!
views.py
def SaveAssigned(request):
if request.method == "POST":
if request.POST.get('assigned'):
savevalue = Post()
savevalue.assign_to = request.POST.get('assigned')
savevalue.save()
return render(request, 'post_detail.html')
else:
return render(request, 'post_detail.html')
class PostDetailView(DetailView):
model = Post
# template_name = 'home/post_detail.html'
def get_context_data(self, *args, **kwargs):
post_available = get_object_or_404(Post, id=self.kwargs['pk'])
cat_menu = Category.objects.all()
context = super(PostDetailView, self).get_context_data()
context["cat_menu"] = cat_menu
return context
urls.py
urlpatterns = [
path('', PostListView.as_view(), name='home'),
path('post/<int:pk>/', PostDetailView.as_view(), name='post-detail'),
path('post/new/', PostCreateView.as_view(), name='post-create'),
path('post/<int:pk>/update/', PostUpdateView.as_view(), name='post-update'),
path('post/<int:pk>/delete/', PostDeleteView.as_view(), name='post-delete'),
path('post/<int:pk>/comment/', AddCommentView.as_view(), name='add-comment'),
path('add_category/', AddCategoryView.as_view(), name='add-category'),
path('category/<str:cats>/', CategoryView, name='category'),
path('category-list/', CategoryListView, name='category-list'),
]
models.py
class Post(models.Model):
title = models.CharField(max_length = 100)
snippet = models.CharField(max_length= 200)
content = RichTextField(blank=True, null=True)
date_posted = models.DateTimeField(default = timezone.now)
author = models.ForeignKey(User, on_delete= models.CASCADE)
category = models.CharField(max_length=255, default='Coding')
assign_to = models.ForeignKey(User,related_name='assign_to', on_delete=models.CASCADE, null=True)
def __str__(self):
return self.title + ' | ' + str(self.author)
def get_absolute_url(self):
return reverse('home')
post_detail.html
{% extends 'users/base.html' %}
{% block body %}
<article class="media content-section">
<img class="rounded-circle article-img" src="{{ object.author.profile.image.url }}">
<div class="media-body">
<div class="article-metadata">
<a class="mr-2" href="#">{{ object.author }}</a>
<small class="text-muted">{{ object.category }}</small>
<small class="text-muted" style="float: right;">{{ object.date_posted|date:"F d, Y" }}</small>
</div>
<h2 class="article-title">{{ object.title }}</h2>
<p class="article-content">{{ object.content|safe }}</p>
</div>
</article>
{% if object.author == user %}
<div>
<a class="btn btn-outline-secondary bt-sm mt-1 mb-1" href="{% url 'post-update' object.id %}">Update</a>
<a class="btn btn-outline-danger bt-sm mt-1 mb-1" href="{% url 'post-delete' object.id %}">Delete</a>
<a class="btn btn-outline-primary bt-sm mt-1 mb-1" style="float: right;" href="">Done</a>
</div>
<form method="POST">
{% csrf_token %}
<select name="assigned">
<option selected disabled="true"> Select User</option>
{% if not post.comments.all %}
<option>NA</option>
{% else %}
{% for comment in post.comments.all %}
<option>{{ comment.author }}</option>
{% endfor %}
{% endif %}
</select>
<input type="submit" value="Assign" name="">
</form>
{% endif %}
<br>
<hr>
<h2>Comment Section</h2>
<br>
{% if not post.comments.all %}
No Comments yet
<br>
Be the first Ont to Comment!
{% else %}
Add a comment
<br>
{% for comment in post.comments.all %}
<strong>
{{ comment.author }} - {{ comment.date_added }}
</strong>
<br>
{{ comment.body }}
<br><br>
{% endfor %}
<hr>
{% endif %}
<br><br>
{% endblock %}

This error occurs when your model does not contain the specific column and you are trying to add the value in that model with a specific column name.
You can solve this by following steps -
Step - 1. python manage.py makemigration
Step - 2. python manage.py migrate

Django Adding Pagination To Search Form Page

How do I add pagination to this form's search functionality?
By default, on page refresh, the HTML template for loop shows all the results for all the courses. When the user types in criteria into the form, the form filters the course results template for loop based on what the user typed. Is there a way on page refresh to show only a set limit of course results on the page instead of all of them? Then when a user searches/filters, that pagination limit of X number of course results on a page will still need to show but still applied to the search criteria/filter.
HTML:
<form id='courseform' action="." method="get">
<div class="form-row">
<div class="form-group col-12"> {{ form.title__icontains }} </div>
<div class="form-group col-md-2 col-lg-2"> {{ form.visited_times__gte.label_tag }} {{ form.visited_times__gte }} </div>
<div class="form-group col-md-2 col-lg-2"> {{ form.visited_times__lte.label_tag }} {{ form.visited_times__lte }} </div>
<div class="form-group col-md-2 col-lg-2"> {{ form.created_at__gte.label_tag }} {{ form.created_at__gte }} </div>
<div class="form-group col-md-2 col-lg-2"> {{ form.created_at__lte.label_tag }} {{ form.created_at__lte }} </div>
<div class="form-group col-md-2"> {{ form.skill_level.label_tag }} {{ form.skill_level }} </div>
<div class="form-group col-md-2"> {{ form.subjects.label_tag }} {{ form.subjects }} </div>
</div>
<script src='https://www.google.com/recaptcha/api.js?render=6LeHe74UAAAAAKRm-ERR_fi2-5Vik-uaynfXzg8N'></script>
<div class="g-recaptcha" data-sitekey="6LeHe74UAAAAAKRm-ERR_fi2-5Vik-uaynfXzg8N"></div>
<button type="submit" class="btn btn-primary form-control">Search</button>
<p>This site is protected by reCAPTCHA and the Google
<a target="_blank" rel="noopener noreferrer" href="https://policies.google.com/privacy">Privacy Policy</a> and
<a target="_blank" rel="noopener noreferrer" href="https://policies.google.com/terms">Terms of Service</a> apply.
</p>
</form>
<!--Used to have {{ object.subjects }} next to -->
{% for object in object_list %}
<a class="course_list_link" href="{{ object.get_absolute_url }}"> <p class = "course_list_border"> <strong> {{ object }} </strong> <br/> <br/> {{ object.description }} <br/><br/> {{ object.skill_level }}   {{ object.created_at }}   Views: {{ object.visited_times }}  
{% for sub in object.subjects.all %}
{{ sub.name }}
{% endfor %} </p> </a>
{% endfor %}
Views.py:
class CourseListView(ListView):
template_name = 'courses/course_list.html'
​
def get_queryset(self):
return Course.objects.all()
​
def get(self, request, *args, **kwargs):
form = CourseForm(request.GET)
queryset = self.get_queryset()
if form.is_valid():
queryset = queryset.filter(**{k: v for k, v in form.cleaned_data.items() if v})
self.object_list = queryset
return self.render_to_response(self.get_context_data(form=form,object_list=queryset,))
Forms.py:
class CourseForm(forms.Form):
title__icontains = forms.CharField(widget=forms.TextInput(attrs={'class':'form-control col-12', 'autocomplete':'off', 'id':'title_contains', 'type':'search', 'placeholder': 'Course Name'}), required=False)
visited_times__gte = forms.IntegerField(widget=forms.NumberInput(attrs={'class':'form-control', 'autocomplete':'off','id':'view_count_max', 'type':'number', 'min':'0', 'placeholder': '0'}), required=False, validators=[MinValueValidator(0), MaxValueValidator(99999999999999999999999999999999999)])
visited_times__lte = forms.IntegerField(widget=forms.NumberInput(attrs={'class':'form-control', 'autocomplete':'off', 'id':'view_count_min', 'type':'number', 'min':'0', 'placeholder': '1000000'}), required=False, validators=[MinValueValidator(0), MaxValueValidator(99999999999999999999999999999999999)])
created_at__gte = forms.DateField(widget=forms.TextInput(attrs={'class':'form-control', 'autocomplete':'off', 'id':'date_max','type':'date', 'placeholder': 'mm/dd/yyy'}), required=False)
created_at__lte = forms.DateField(widget=forms.TextInput(attrs={'class':'form-control', 'autocomplete':'off', 'id':'date_min', 'type':'date', 'placeholder': 'mm/dd/yyy'}), required=False)
skill_level = forms.ChoiceField(widget=forms.Select(attrs={'class':'form-control', 'autocomplete':'off','id':'skill_level'}), choices = ([('',''), ('Beginner','Beginner'), ('Intermediate','Intermediate'),('Advanced','Advanced'), ]), required=False)
subjects = forms.ModelChoiceField(queryset=Subject.objects.all().order_by('name'), empty_label="", widget=forms.Select(attrs={'class':'form-control', 'autocomplete':'off', 'id':'subjects'}), required=False)
# the new bit we're adding
def __init__(self, *args, **kwargs):
super(CourseForm, self).__init__(*args, **kwargs)
self.fields['title__icontains'].label = "Course Name:"
self.fields['visited_times__gte'].label = "Min Views:"
self.fields['visited_times__lte'].label = "Max Views:"
self.fields['created_at__gte'].label = "Min Date:"
self.fields['created_at__lte'].label = "Max Date:"
self.fields['skill_level'].label = "Skill Level:"
self.fields['subjects'].label = "Subject:"
self.fields['subjects'].queryset = Subject.objects.filter()
Models.py:
class Subject(models.Model):
SUBJECT_CHOICES = ()
name = models.CharField(max_length=20,choices=SUBJECT_CHOICES)
def __str__(self):
return self.name
​
class Meta:
ordering = ('name',)
​
class Course(models.Model):
​
SKILL_LEVEL_CHOICES = (
('Beginner', 'Beginner'),
('Intermediate', 'Intermediate'),
('Advanced', 'Advanced'),
)
​
slug = models.SlugField()
title = models.CharField(max_length=120)
description = models.TextField()
allowed_memberships = models.ManyToManyField(Membership)
created_at = models.DateTimeField(auto_now_add=True)
subjects = models.ManyToManyField(Subject)
skill_level = models.CharField(max_length=20,choices=SKILL_LEVEL_CHOICES, null=True)
visited_times = models.PositiveIntegerField(default=0)
def __str__(self):
return self.title
def get_absolute_url(self):
return reverse('courses:detail', kwargs={'slug': self.slug})
#property
def lessons(self):
return self.lesson_set.all().order_by('position')
​
class Meta:
ordering = ('title',)
I tried following some tutorials Django docs one but not sure how to embed that pagination code to mine.
https://docs.djangoproject.com/en/3.0/topics/pagination/
I would appreciate if anyone could help me with this.

Please edit to include your code.
In the page you linked to, read this section:
https://docs.djangoproject.com/en/3.0/topics/pagination/#paginating-a-listview
You just need to add this to your ListView
paginate_by = N
then add
<div class="pagination">
<span class="step-links">
{% if contacts.has_previous %}
« first
previous
{% endif %}
<span class="current">
Page {{ contacts.number }} of {{ contacts.paginator.num_pages }}.
</span>
{% if contacts.has_next %}
next
last »
{% endif %}
</span>
</div>
to course_list.html.

Serach form (html) :
<!-- Search Form -->
<form class="navbar-search navbar-search-dark form-inline mr-3 d-none d-md-flex ml-lg-auto" action="{% url 'search' %}" method="get">
<div class="form-group mb-0">
<input class="form-control mr-sm-2" type="search" placeholder="Search Tasks" aria-label="Search" name="q">
<button class="btn btn-outline-white my-2 my-sm-0" type="submit">Search</button>
</div>
</form>
views.py
class SearchView(ListView): # taskları arama sonucu listeliyoruz
model = Task
template_name = 'task/search.html'
paginate_by = 5
context_object_name = 'task'
def get_queryset(self):
query = self.request.GET.get("q")
if query:
return Task.objects.filter(
Q(title__icontains=query) | Q(content__icontains=query) | Q(tag__title__icontains=query)).order_by(
'id').distinct()
return Task.objects.all().order_by('id')
In whichever field you want to use pagination, write the code there (example category_detail.html) :
<div class="card-footer py-4">
{% if is_paginated %}
<nav aria-label="...">
<ul class="pagination justify-content-end mb-0">
{% if page_obj.has_previous %}
<li class="page-item">
<a class="page-link" href="?page={{ page_obj.previous_page_number }}" tabindex="-1">
<i class="fas fa-angle-left"></i>
<span class="sr-only">Previous</span>
</a>
</li>
{% else %}
<li class="page-item disabled">
<a class="page-link" href="#" tabindex="-1">
<i class="fas fa-angle-left"></i>
<span class="sr-only">Previous</span>
</a>
</li>
{% endif %}
{% for i in paginator.page_range %}
{% if page_obj.number == i %}
<li class="page-item active">
<a class="page-link" href="#"> {{ i }} </a>
</li>
{% else %}
<li class="page-item">
<a class="page-link" href="?page={{ i }}">{{ i }}<span class="sr-only">(current)</span></a>
</li>
{% endif %}
{% endfor %}
{% if page_obj.has_next %}
<li class="page-item">
<a class="page-link" href="?page={{ page_obj.next_page_number }}">
<i class="fas fa-angle-right"></i>
<span class="sr-only">Next</span>
</a>
</li>
{% else %}
<li class="page-item disabled">
<a class="page-link" href="#">
<i class="fas fa-angle-right"></i>
<span class="sr-only">Next</span>
</a>
</li>
{% endif %}
</ul>
</nav>
{% endif %}
</div>
I hope the examples worked for you.

Django templates don't show my all parameters

I have problem. I want create relationship in model Django. I would like every user to have a different product price. The product must be assigned to the user. It must is to display only after logging in. Unfortunately, the template does not show all parameters.
offers/models.py
class Product(models.Model):
title = models.CharField(max_length=100)
category = models.CharField(max_length=50)
weight = models.FloatField()
description = models.TextField(blank=True)
photo = models.ImageField(upload_to='photos/%Y/%m/%d/')
is_published = models.BooleanField(default=True)
list_date = models.DateField(default=datetime.now, blank=True)
def __str__(self):
return self.title
class UserProduct(models.Model):
user = models.ForeignKey(settings.AUTH_USER_MODEL, on_delete=models.CASCADE)
title = models.ForeignKey(Product, on_delete=models.DO_NOTHING)
price = models.FloatField()
is_published = models.BooleanField(default=True)
list_date = models.DateField(default=datetime.now, blank=True)
def __str__(self):
return str(self.user.username) if self.user.username else ''
Products are to be displayed for logged in users.
offers/views.py
def index(request):
context = {
'products': Product.objects.order_by('category').filter(is_published=True)
}
return render(request, 'offers/products.html', context)
def userproduct(request):
context = {
'userproduct': UserProduct.objects.filter(user_id=request.user.id),
'userproduct1': Product.objects.all()
}
return render(request, 'offers/userproducts.html', context)
My template show only title, and price.
offers/userproducts.html
<!-- Offers -->
<section class="text-center mb-4 py-4">
<div class="container">
<div class="row">
{% if user.is_authenticated %}
{% if userproduct %}
{% for product in userproduct %}
<!--Grid column-->
<div class="col-lg-3 col-md-6 mb-4">
<div class="card">
<div class="view overlay">
<img src="{{ product.photo.url }}" class="card-img-top" alt="">
<a href="{% url 'product' product.id %}">
<div class="mask rgba-white-slight"></div>
</a>
</div>
<div class="card-body text-center">
<h6 class="grey-text">{{ product.category }}</h6>
<h5>
<strong>
{{ product.title }}
</strong>
</h5>
<h4 class="font-weight-bold colores">
<strong>{{ product.price }}</strong>
</h4>
</div>
</div>
</div>
<!--Grid column-->
{% endfor %}
{% else %}
<div class="col-sm-12 sm-12">
<p>No Products Available XD</p>
</div>
{% endif %}
{% endif %}
</div>
</div>
</section>

The userproduct queryset that you are iterating over belongs to UserProduct model which doesn't have the fields you're looking for.
This is how it should be:
<!-- Offers -->
<section class="text-center mb-4 py-4">
<div class="container">
<div class="row">
{% if user.is_authenticated %}
{% if userproduct %}
{% for product in userproduct %}
<!--Grid column-->
<div class="col-lg-3 col-md-6 mb-4">
<div class="card">
<div class="view overlay">
<img src="{{ product.title.photo.url }}" class="card-img-top" alt="">
<a href="{% url 'product' product.title.id %}">
<div class="mask rgba-white-slight"></div>
</a>
</div>
<div class="card-body text-center">
<h6 class="grey-text">{{ product.title.category }}</h6>
<h5>
<strong>
{{ product.title.title }}
</strong>
</h5>
<h4 class="font-weight-bold colores">
<strong>{{ product.price }}</strong>
</h4>
</div>
</div>
</div>
<!--Grid column-->
{% endfor %}
{% else %}
<div class="col-sm-12 sm-12">
<p>No Products Available XD</p>
</div>
{% endif %}
{% endif %}
</div>
</div>
</section>
If you need a field from Product model, you should get the Product instance which is title. So:
Price: product.price
Title: product.title.title (product.title also works because of your __str__ function.)
Category: product.title.category
Photo: product.title.photo
And so on ...

saving multiple data like checkbox at once in django

I am working in ang django project onlinevoting. In my template I use
looping to loop all the positions and also the candidates. I have trouble in saving many data at once in one attribute for example in my model I have:
class Vote(models.Model):
candidate_id = models.ForeignKey('Candidate', blank=True, null=True)
election_id = models.ForeignKey('Election', blank=True, null=True)
user_id = models.ForeignKey('User', blank=True, null=True)
def __str__(self):
return "%s %s" % (user_id.first_name, election_id.year)
and in my template vote.html:
<form method="POST" class="form-horizontal" role="form">
{% if success %}
<div class="alert alert-success">
×
<strong>Success!</strong> {{ success }}
</div>
{% endif %}
{% if exist %}
<div class="alert alert-warning">
×
<strong>Warning!</strong> {{ exist }}
</div>
{% endif %}
{% csrf_token %}
<div class="form-group ">
{% for position in positions %}
<label for="cname" class="control-label col-lg-2">{{ position }}<span class="required">*</span></label>
{% for candidate in candidates %}
{% if position.pk == candidate.position_id.pk %}
<div class="col-lg-3">
<input type="checkbox" name="candidate_id" value="{{ candidate.pk }}">{{ candidate }}<br>
</div>
{% endif %}
{% endfor %}
</div>
{% endfor %}
<button class="btn btn-primary" type="submit">Save</button>
<button class="btn btn-default" type="button">Cancel</button>
</div>
</div>
</form>
How can I add/save all the candidates? because the user can select many candidates and I want to save them at once. This is my views.py
def vote(request):
if request.user.is_authenticated and request.user.is_admin:
candidates = Candidate.objects.all()
election = Election.objects.all().filter(is_active=True)
positions = Position.objects.all()
user = get_object_or_404(User, pk=request.user.pk)
try:
if request.method == 'POST':
candidate_id = request.POST['candidate_id']
vote = Vote.objects.create(candidate_id=candidate_id)
vote.save()
vote.election_id = election
vote.save()
vote.user_id = user
vote.save()
else:
form = VoteForm()
return render(request,'system/vote.html', {'form':form, 'candidates': candidates,
'election': election, 'user': user,
'positions': positions})
except:
exist = "ERROR!"
form = VoteForm()
return render(request,'system/vote.html', {'form':form, 'exist': exist})
elif not request.user.is_authenticated:
return redirect('system.views.user_login')