So I'm trying to use pagination, When I visit the page I get MultiValueDictKeyError at /products/
'page', and when I go to localhost:8000/thatpage/?page=1 then I get TypeError at /products/
'Paginator' object is not callable.
This error occurs when i visit the page and i don't know what i'm doing wrong, Any help would be great.
views.py
def showproducts(request):
oof = CartItem.objects.filter(user=request.user).values_list('book', flat=True)
lmao = OrderItem.objects.filter(user=request.user).values_list('book', flat=True)
hehe = CartItem.objects.filter(user=request.user)
category = Category.objects.all()
haha = Paginator(Book, 2)
page = request.GET['page']
fianlprice = 0
for item in hehe:
fianlprice += item.book.price
# books = Book.objects.all()
books = haha(page)
return render(request, 'main/products.html', {'books':books, 'price':fianlprice, 'cart':oof, 'order':lmao, 'category':category})
products.html
<h1>Products</h1>
<h1>{{ error }}</h1>
{% if user.is_authenticated %}
<h1>Your cart currently costs ${{ price }}</h1>
{% else %}
<h1>Please login to view your cart</h1>
{% endif %}
<form method="GET" action="/search/">
<label>Choose a category</label>
<select name="category" id="category">
<option value="All" selected>All</option>
{% for name in category %}
<option value="{{ name.name }}">{{ name.name }}</option>
{% endfor %}
</select>
<input type="text" placeholder="Search here" name="search" id="search">
<button type="submit">Search</button>
</form>
{% for book in books %}
<h3>{{ book.name }}</h3>
<img src= "/media/{{ book.image }}" alt="">
<p>{{ book.description }}</p>
{% if not user.is_authenticated %}
<p>Please login</p>
{% else %}
{% if book.id in cart %}
<form method="POST" action="/removefromcartforhome/">
{% csrf_token %}
<button type="submit" name="removeid" value="{{ book.id }}">remove item from cart</button>
</form>
{% elif book.id in order %}
<h3>You already own this</h3>
{% else %}
<form method="POST" action="/addtocartforhome/">
{% csrf_token %}
<button type="submit" name="bookid" value="{{ book.id }}">Add to cart</button>
</form>
{% endif %}
{% endif %}
{% endfor %}
{% if books.has_other_pages %}
{% if listing.has_previous %}
<li class="page-item">
«
</li>
{% else %}
<li class="page-item disabled">
<a class="page-link">«</a>
</li>
{% endif %}
{% for i in books.paginator.page_range %}
{% if books.number == i %}
<li class="page-item active">
<a class="page-link">{{i}}</a>
</li>
{% else %}
<li class="page-item">
{{i}}
</li>
{% endif %}
{% endfor %}
{% if books.has_next %}
<li class="page-item">
»
</li>
{% else %}
<li class="page-item disabled">
<a class="page-link">»</a>
</li>
{% endif %}
{% else %}
{% endif %}
The request.GET['page'] will raise an error if the ?page=… querystring is missing. You can work with request.GET.get('page') to return None in case the it is missing.
Furthermore you can not call haha(page), you call the .page(…) method [Django-doc] or the .get_page(…) method [Django-doc], so:
from django.http import Http404
def showproducts(request):
oof = CartItem.objects.filter(user=request.user).values_list('book', flat=True)
lmao = OrderItem.objects.filter(user=request.user).values_list('book', flat=True)
hehe = CartItem.objects.filter(user=request.user)
category = Category.objects.all()
haha = Paginator(Book, 2)
page = request.GET.get('page') or 1 # ← 1 in case ?page=… does not exists
try:
page = int(page)
except ValueError:
raise Http404
fianlprice = 0
for item in hehe:
fianlprice += item.book.price
# books = Book.objects.all()
books = haha.page(page) # ← use the .page(…) method
return render(request, 'main/products.html', {'books':books, 'price':fianlprice, 'cart':oof, 'order':lmao, 'category':category})
Related
So I'm trying to use pagination in django, When I click on previous it takes me to localhost:8000/thatpage/?page= when it is supposed to take me to the previous page, It also gives me error on that page. I have tried handling it in my views.py but it doesn't work.
I have also tried using books_obj.previous_page_number but that doesn't work too.
I'm using Django 3.1
views.py
def showproducts(request):
oof = CartItem.objects.filter(user=request.user).values_list('book', flat=True)
lmao = OrderItem.objects.filter(user=request.user).values_list('book', flat=True)
hehe = CartItem.objects.filter(user=request.user)
category = Category.objects.all()
haha = Paginator(Book.objects.all(), 2)
page = request.GET.get('page')
if page is None or "":
page = 1
fianlprice = 0
for item in hehe:
fianlprice += item.book.price
# books = Book.objects.all()
books = haha.page(page)
return render(request, 'main/products.html', {'books':books, 'price':fianlprice, 'cart':oof, 'order':lmao, 'category':category})
products.html
<h1>Products</h1>
<h1>{{ error }}</h1>
{% if user.is_authenticated %}
<h1>Your cart currently costs ${{ price }}</h1>
{% else %}
<h1>Please login to view your cart</h1>
{% endif %}
<form method="GET" action="/search/">
<label>Choose a category</label>
<select name="category" id="category">
<option value="All" selected>All</option>
{% for name in category %}
<option value="{{ name.name }}">{{ name.name }}</option>
{% endfor %}
</select>
<input type="text" placeholder="Search here" name="search" id="search">
<button type="submit">Search</button>
</form>
{% for book in books %}
<h3>{{ book.name }}</h3>
<img src= "/media/{{ book.image }}" alt="">
<p>{{ book.description }}</p>
{% if not user.is_authenticated %}
<p>Please login</p>
{% else %}
{% if book.id in cart %}
<form method="POST" action="/removefromcartforhome/">
{% csrf_token %}
<button type="submit" name="removeid" value="{{ book.id }}">remove item from cart</button>
</form>
{% elif book.id in order %}
<h3>You already own this</h3>
{% else %}
<form method="POST" action="/addtocartforhome/">
{% csrf_token %}
<button type="submit" name="bookid" value="{{ book.id }}">Add to cart</button>
</form>
{% endif %}
{% endif %}
{% endfor %}
{% if books.has_other_pages %}
{% if books.has_previous %}
<li class="page-item">
«
</li>
{% else %}
<li class="page-item disabled">
<a class="page-link">«</a>
</li>
{% endif %}
{% for i in books.paginator.page_range %}
{% if books.number == i %}
<li class="page-item active">
<a class="page-link">{{i}}</a>
</li>
{% else %}
<li class="page-item">
{{i}}
</li>
{% endif %}
{% endfor %}
{% if books.has_next %}
<li class="page-item">
»
</li>
{% else %}
<li class="page-item disabled">
<a class="page-link">»</a>
</li>
{% endif %}
{% else %}
<p>no pages</p>
{% endif %}
Change this code from:
if page is None or "":
page = 1
to
page = request.GET.get('page', None)
if page == None or page == "":
page = 1
# or
if not page:
page = 1
Update
You can use http referee to redirect to previous page:
if not page:
return HttpResponseRedirect(request.META.get('HTTP_REFERER'))
Hi I'm trying to develop an online store website using Django and I don't know why, but my price counter is not working. It was working all fine before I added some pagination, and now it's not adding all the values.Can anyone please help me out?
My views.py:
def cart(request):
cart = Cart.objects.all()[0]
context = {"cart":cart}
template = 'shopping_cart/cart.html'
return render(request, template, context)
def add_to_cart(request, slug):
cart = Cart.objects.all()[0]
try:
product = Product.objects.get(slug=slug)
except Product.DoesNotExist:
pass
except:
pass
if not product in cart.products.all():
cart.products.add(product)
messages.success(request, mark_safe("Product added to cart. Go to <a href='cart/'>cart</a>"))
return redirect('myshop-home')
else:
cart.products.remove(product)
messages.success(request, mark_safe("Product removed from cart"))
new_total = 0.00
for item in cart.products.all():
new_total += float(item.price)
cart.total = new_total
cart.save()
return HttpResponseRedirect(reverse('cart'))
My index.html(where I added pagination):
{% extends 'base.html' %}
{% block content %}
<h1>Products</h1>
<div class="container-md">
<div class="row">
{% for product in products %}
<div class="col">
<div class="card-deck" style="width: 18rem;">
<img src="{{ product.image_url }}" class="card-img-top" alt="...">
<div class="card-body">
<a class="card-title text-dark" href="{% url 'detail-view' product.slug %}">{{ product.name }}</a>
<p class="card-text">${{ product.price }}</p>
{% if not product.cart_set.exists %}
Add to Cart
{% else %}
Remove from Cart
{% endif %}
</div>
</div>
</div>
{% endfor %}
</div>
</div>
<div>
<ul class="pagination justify-content-center">
{% if is_paginated %}
{% if page_obj.has_previous %}
<a class="btn btn-outline-dark mb-4" href="?page=1">First</a>
<a class="btn btn-outline-dark mb-4" href="?page={{ page_obj.previous_page_number }}">Previous</a>
{% endif %}
{% for num in page_obj.paginator.page_range %}
{% if page_obj.number == num %}
<a class="btn btn-dark mb-4 " href="?page={{ num }}">{{ num }}</a>
{% elif num > page_obj.number|add:'-3' and num < page_obj.number|add:'3' %}
<a class="btn btn-outline-dark mb-4" href="?page={{ num }}">{{ num }}</a>
{% endif %}
{% endfor %}
{% if page_obj.has_next %}
<a class="btn btn-outline-dark mb-4" href="?page={{ page_obj.next_page_number }}">Next</a>
<a class="btn btn-outline-dark mb-4" href="?page={{ page_obj.paginator.num_pages }}">Last</a>
{% endif %}
{% endif %}
</ul>
</div>
{% endblock %}
My homeview:
class homeview(ListView):
model = Product
paginate_by = 6
context_object_name = 'products'
template_name = 'index.html'
My urls.py:
urlpatterns = [
path('admin/', admin.site.urls),
path('cart/', sc_views.cart, name='cart'),
path('cart/<str:slug>/', sc_views.add_to_cart, name='add-to-cart'),
path('', include('products.urls'))
]
I'm trying to set up pagination within my Django project but I can't find a way to make the filters (ptags in my case) follow to the next pages.
Ps; I use Django-haystack with faceting for filtering.
I have a custom forms.py
from haystack.forms import FacetedSearchForm
class FacetedProductSearchForm(FacetedSearchForm):
def __init__(self, *args, **kwargs):
data = dict(kwargs.get("data", []))
self.ptag = data.get('ptags', [])
super(FacetedProductSearchForm, self).__init__(*args, **kwargs)
def search(self):
sqs = super(FacetedProductSearchForm, self).search()
if self.ptag:
query = None
for ptags in self.ptag:
if query:
query += u' OR '
else:
query = u''
query += u'"%s"' % sqs.query.clean(ptags)
sqs = sqs.narrow(u'ptags_exact:%s' % query)
return sqs
That I pass in my Views:
class FacetedSearchView(BaseFacetedSearchView):
form_class = FacetedProductSearchForm
facet_fields = ['ptags']
template_name = 'search_result.html'
paginate_by = 3
context_object_name = 'object_list'
Here's my full search_result.html:
<div>
{% if page_obj.object_list %}
<ol class="row top20" id="my_list">
{% for result in page_obj.object_list %}
<li class="list_item">
<div class="showcase col-sm-6 col-md-4">
<div class="matching_score"></div>
<a href="{{ result.object.get_absolute_url }}">
<h3>{{result.object.title}}</h3>
<h5>{{ result.object.destination }}</h5>
<img src="{{ result.object.image }}" class="img-responsive">
</a>
<div class="text-center textio">
<ul class="tagslist">
<li class="listi">
{% for tags in result.object.ptags.names %}
<span class="label label-info"># {{ tags }}</span>
{% endfor %}
</li>
</ul>
</div>
</div>
</li>
{% endfor %}
</ol>
</div>
I'm able to pass the query which is a destination to the next page by adding this at the bottom of my html:
{% if is_paginated %}
<ul class="pagination pull-right">
{% if page_obj.has_previous %}
<li><i class="fas fa-angle-left"></i>Previous page</li>
{% else %}
<li class="disabled"><span><i class="fas fa-angle-left"></i>Previous page</span></li>
{% endif %}
{% if page_obj.has_next %}
<li>See more results<i class="fas fa-angle-right"></i></li>
{% else %}
<li class="disabled"><span>See more results<i class="fas fa-angle-right"></i></span></li>
{% endif %}
</ul>
{% endif %}
{% else %}
<p> Sorry, no result found for the search term <strong>{{query}} </strong></p>
{% endif %}
But If I try to add the ptags field within the pagination code by doing &ptags like this:
{% if is_paginated %}
<ul class="pagination pull-right">
{% if page_obj.has_previous %}
<li><i class="fas fa-angle-left"></i>Previous page</li>
{% else %}
<li class="disabled"><span><i class="fas fa-angle-left"></i>Previous page</span></li>
{% endif %}
{% if page_obj.has_next %}
<li>See more results<i class="fas fa-angle-right"></i></li>
{% else %}
<li class="disabled"><span>See more results<i class="fas fa-angle-right"></i></span></li>
{% endif %}
</ul>
{% endif %}
{% else %}
<p> Sorry, no result found for the search term <strong>{{query}} </strong></p>
{% endif %}
I get this error when I go to page 2 and the selected checkboxes filters (ptags) are not following:
Page not found (404)
Request Method: GET
Request URL: http://localhost:8000/search/?q=las%20vegas&ptags=&page=2
Raised by: search.views.FacetedSearchView
How can I fix this?
Your template pagination code is removing the extra filter parameters, use this -
In your my_tags.py add this template tag:
#register.simple_tag(name='url_replace')
def url_replace(request, field, value):
d = request.GET.copy()
d[field] = value
return d.urlencode()
paginate as -
{% if is_paginated %}
<br>
<div class="row">
<div class="col-12">
<ul class="pagination float-right">
{% if page_obj.has_previous %}
<li class="page-item"><a class="page-link" href="?{% url_replace request 'page' page_obj.previous_page_number %}">«</a></li>
{% else %}
<li class="page-item disabled"><span class="page-link">«</span></li>
{% endif %}
{% for i in paginator.page_range %}
{% if page_obj.number == i %}
<li class="active page-item"><span class="page-link">{{ i }} <span class="sr-only">(current)</span></span></li>
{% else %}
<li class="page-item"><a class="page-link" href="?{% url_replace request 'page' i %}">{{ i }}</a></li>
{% endif %}
{% endfor %}
{% if page_obj.has_next %}
<li class="page-item"><a class="page-link" href="?{% url_replace request 'page' page_obj.next_page_number %}">»</a></li>
{% else %}
<li class="page-item disabled"><span class="page-link">»</span></li>
{% endif %}
</ul>
</div>
</div>
{% endif %}
I have tried something like this in views.py:
class HomePage(TemplateView):
template_name = "clouderp/index.html"
def get_context_data(self, **kwargs):
context = super(HomePage, self).get_context_data(**kwargs)
qs = Blog.objects.all()
context['blog_list'] = qs
page = self.request.GET.get('page')
paginator = Paginator(qs, 4)
try:
users = paginator.page(page)
except PageNotAnInteger:
users = paginator.page(1)
except EmptyPage:
users = paginator.page(paginator.num_pages)
context['users'] = users
return context
And in template:
{% if users.has_other_pages %}
<ul class="pagination">
{% if users.has_previous %}
<li>«</li>
{% else %}
<li class="disabled"><span>«</span></li>
{% endif %}
{% for i in users.paginator.page_range %}
{% if users.number == i %}
<li class="active"><span>{{ i }} <span class="sr-only"></span></span></li>
{% else %}
<li>{{ i }}</li>
{% endif %}
{% endfor %}
{% if users.has_next %}
<li>»</li>
{% else %}
<li class="disabled"><span>»</span></li>
{% endif %}
</ul>
{% endif %}
I have created a blog application using django
I want to show all my blogs in my main index.html page and also wanted to do pagination for the blogs in my index page...
I was wondering how to do it...
Because the process I have done the blogs are not paginated according to 4 at a time...
Please try this code as below:
in views.py code
class BookListView(ListView):
model=Book
paginate_by=10
template_name='book/book_list.html'
def get_context_data(self, **kwargs):
context = super().get_context_data(**kwargs)
print (context)
paginator = context['paginator']
page_numbers_range = 10 # Display 5 page numbers
max_index = len(paginator.page_range)
page = self.request.GET.get('page')
print (self.request)
current_page = int(page) if page else 1
start_index = int((current_page - 1) / page_numbers_range) * page_numbers_range
end_index = start_index + page_numbers_range
if end_index >= max_index:
end_index = max_index
page_range = paginator.page_range[start_index:end_index]
context['page_range'] = page_range
return context
book_list = BookListView.as_view()
and the template:
<div class="container">
<!-- Pagination -->
{% if is_paginated %}
<nav>
<ul class="pagination justify-content-center" style="margin:20px 0">
{% if page_obj.has_previous %}
<li class="page-item">
<a class="page-link" href="?page={{ page_obj.previous_page_number }}">
<span>Prev</span>
</a>
</li>
{% else %}
<li class="disabled page-item">
<a class="page-link" href="#">
<span>Prev</span>
</a>
</li>
{% endif %}
{% for page in page_range %}
<li {% if page == page_obj.number %} class="active page-item" {% endif %}>
<a class="page-link" href="?page={{ page }}">{{ page }}</a>
</li>
{% endfor %}
{% if page_obj.has_next %}
<li class="page-item">
<a class="page-link" href="?page={{ page_obj.next_page_number }}">
<span>Next</span>
</a>
</li>
{% else %}
<li {% if not page_obj.has_next %}class="disabled page-item"{% endif %}>
<a class="page-link" href="#">
<span>Next</span>
</a>
</li>
{% endif %}
</ul>
</nav>
{% endif %}
</div>
How can I paginate using multiple filters in Django CBV? I have some filters in my view and form and I don't know how to paginate it. Everything that I've tried has failed.
Here my code.
models.py
class Lei(models.Model):
CHOICE_TIPO_LEI = (
('complementar', 'Lei complementar'),
('ordinaria', 'Lei ordinária'),
('decreto', 'Decreto'),
('portaria', 'Portaria'),
('convenio', 'Convênios Municipais'),
)
numero = models.CharField(max_length=6)
tipo_lei = models.CharField(u'Tipo do documento', max_length=15, choices=CHOICE_TIPO_LEI)
ano = models.CharField(max_length=4)
titulo = models.TextField()
arquivo = FileBrowseField("Arquivo PDF", max_length=200, extensions=[".pdf",".doc", ".xls", ".docx", ".xlsx"], directory="leis/", blank=True, null=True)
publicacao = models.DateTimeField(u'publicação', auto_now=True, blank=True)
class Meta:
db_table = "tb_lei"
verbose_name = "Lei"
verbose_name_plural = "Leis"
def __str__(self):
return self.titulo
views.py
class LeisListView(ComunsNoticiasMixin, ListView):
model = Lei
template_name = 'leis/leis.html'
context_object_name = 'leis'
def get_context_data(self, **kwargs):
context = super(LeisListView, self).get_context_data(**kwargs)
context["an"] = Lei.objects.values('ano').distinct().order_by('-ano')
context["tl"] = Lei.objects.values('tipo_lei').distinct().order_by('tipo_lei')
return context
class BuscaLeiListView(ComunsNoticiasMixin, ListView):
model = Lei
template_name = 'leis/busca-leis.html'
context_object_name = 'busca_leis'
paginate_by = 1
def get_queryset(self, **kwargs):
numero = self.request.GET.get('n')
ano = self.request.GET.get('a')
tipo_lei = self.request.GET.get('t')
palavra = self.request.GET.get('p')
leis = Lei.objects.all().order_by('-ano', '-numero')
if numero:
leis = leis.filter(numero=numero)
if ano:
leis = leis.filter(ano=ano)
if tipo_lei:
leis = leis.filter(tipo_lei=tipo_lei)
if palavra:
leis = leis.filter(titulo__icontains=palavra)
return leis
form.html
<form method="get" action="{% url 'leis:busca_lei_view' %}">
<div class="form-group">
<select name="t" class="form-control">
<option value="">Tipo do documento</option>
{% for l in tl %}
<option value="{{ l.tipo_lei }}">
{% if l.tipo_lei == "complementar" %} Leis complementares
{% elif l.tipo_lei == "ordinaria" %} Leis ordinárias
{% elif l.tipo_lei == "decreto" %} Decretos
{% elif l.tipo_lei == "convenio" %} Convênios municipais
{% elif l.tipo_lei == "portaria" %} Portarias
{% endif %}
</option>
{% endfor %}
</select>
</div>
<div class="form-group">
<input name="n" type="text" class="form-control" placeholder="numero da lei, portaria ou decreto" size="10" maxlength="30">
</div>
<div class="form-group">
<select name="a" class="form-control">
<option value="">ano</option>
{% for l2 in an %}
<option value="{{ l2.ano }}">{{ l2.ano }}</option>
{% endfor %}
</select>
</div>
<div class="form-group">
<button value="{{ search_term }}" class="btn btn-info">pesquisar</button>
</div>
<hr />
<div class="form-group">
<label for="t"><strong>Ou digite um termo a ser pesquisado</strong></label>
<input name="p" class="form-control" type="text" placeholder="digite um termo a ser pesquisado" size="20" maxlength="30">
</div>
<button value="{{ search_term }}" class="btn btn-info">Pesquisar</button>
result.html
<div class="row">
<div class="col-xs-12">
{% if busca_leis %}
{% for lb in busca_leis %}
<h4 ><a href="{{ lb.arquivo.url }}" class="text-primary">
{% if lb.tipo_lei == "complementar" %}Lei complementar n° {% elif lb.tipo_lei == "ordinaria" %} Lei ordinária nº {% elif lb.tipo_lei == "decreto" %} Decreto nº {% elif lb.tipo_lei == "convenio" %} Convênio municipal {% else %} Portaria nº{% endif %} {{ lb.numero }} de {{ lb.ano }}</a>
</h4>
<p class="post-content">{{ lb.titulo|safe }}</p>
<br />
{% endfor %}
<br />
{% else %}
<br /><br />
<div class="alert alert-warning" role="alert">
<h5>
O termo pesquisado não foi encontrado. Utilize os filtros para realizar a pesquisar novamente.
</h5>
voltar
</div>
{% endif %}
</div>
{% if is_paginated %}
<ul class="pagination">
{% if page_obj.has_previous %}
<li>«</li>
{% else %}
<li class="disabled"><span>«</span></li>
{% endif %}
{% for i in paginator.page_range %}
{% if page_obj.number == i %}
<li class="active"><span>{{ i }} <span class="sr-only">(current)</span></span></li>
{% else %}
<li>{{ i }}</li>
{% endif %}
{% endfor %}
{% if page_obj.has_next %}
<li>»</li>
{% else %}
<li class="disabled"><span>»</span></li>
{% endif %}
</ul>
{% endif %}
The existing querystring is being dropped when you click on the pagination, so you need to have a way to carry that information through.
The best option would be to bring that information through.
Start by adding the "django.core.context_processors.request" to settings.py
## settings.py
TEMPLATE_CONTEXT_PROCESSORS = (
'django.core.context_processors.request',
)
Now, you have access to https://docs.djangoproject.com/en/1.8/ref/request-response/#querydict-objects.
In the template change the line:
<a href="?page={{ page_obj.next_page_number }}">
to
<a href="?page={{ page_obj.next_page_number }}{% for key, value in request.GET.items %}{% if key != page %}&{{key}}={{value}}{% endif %}{% endfor %}"
This will loop through the keys in the querystring and ignore the pa