Develop Reference

Passing data from a form to a view Django

I have two functions in views.py, the first one allows you to display information from tables. The second is to get data from the form and redirect to the page with the result. How can I pass the data received from the form to the first function to display information from the tables based on this very data?
In the first function:
def SuOp(request):
allrooms = Rooms.objects.all()
allfood = Food.objects.all()
alltours = Tours.objects.all()
data = {
'allfood': allfood,
'allrooms': allrooms,
'alltours': alltours,
}
return render(request, './obj.html', data)
in the second function:
def Main(request):
error = ''
if request.method == 'POST':
form = SearchMain(request.POST)
if form.is_valid():
budget = form.cleaned_data.get("budget")
arrival_date = form.cleaned_data.get("arrival_date")
departure_date = form.cleaned_data.get("departure_date")
number_of_people = form.cleaned_data.get("number_of_people")
count_days = (departure_date-arrival_date).days
return redirect('allobject')
else:
error = 'The form has been filled out incorrectly'
form SearchMain()
data = {
'formS': form,
'error': error,
}
return render(request, './main.html', data)
urls.py:
urlpatterns = [
path('', views.Main, name='main'),
path(r'allobject/$', views.SuOp, name='allobject')
]

You can use sessions to pass values from one view to another. First set the session:
if form.is_valid():
budget = form.cleaned_data.get("budget")
request.session['budget'] = budget
...
return redirect('allobject')
Then your other view can get the session variable:
def SuOp(request):
budget = request.session.get('budget')
...
allrooms = Rooms.objects.all()
allfood = Food.objects.all()
alltours = Tours.objects.all()
data = {
'allfood': allfood,
'allrooms': allrooms,
'alltours': alltours,
}
return render(request, './obj.html', data)
The other option is to do all the calculations in the view that receives the budget, arrival_date, departure_date, number_of_people, save the desired results to the Rooms, Food and Tours objects.

AttributeError at /update_item/ 'WSGIRequest' object has no attribute 'data'

i was trying to make my first e-commerce website using django and i received this error.
I already search in google but I can't find how to fix it. please help me to find the error.
this is attached. If any data is missing please comment.
cart.js :
var updateBtns = document.getElementsByClassName('update-cart')
for (var i = 0; i < updateBtns.length; i++) {
updateBtns[i].addEventListener('click', function () {
var productId = this.dataset.product`enter code here`
var action = this.dataset.action
console.log('productId:', productId, 'Action:', action)
console.log('USER:', user)
if (user == 'AnonymousUser') {
console.log('Not logged in')
} else {
updateUserOrder(productId)
}
})
}
function updateUserOrder(productId, action) {
console.log('User is logged in, sending data...')
var url = '/update_item/'
fetch(url, {
method: 'POST',
headers: {
'Content-Type': 'application/json',
'X-CSRFToken': csrftoken,
},
body: JSON.stringify({ 'productId': productId, 'action': action })
})
.then(response => response.json())
.then((data) => {
console.log('data:', data);
}
);
}
views.py :
from django.shortcuts import render
from django.http import JsonResponse
from django.http import HttpRequest
import json
from .models import *
def store(request):
products = Product.objects.all()
context = {'products': products}
return render(request, 'store/store.html', context)
def cart(request):
if request.user.is_authenticated:
customer = request.user.customer
order, created = Order.objects.get_or_create(
customer=customer, complete=False)
items = order.orderitem_set.all()
else:
# Create empty cart for now for non-logged in user
items = []
order = {'get_cart_total': 0, 'get_cart_items': 0}
context = {'items': items, 'order': order}
return render(request, 'store/cart.html', context)
def checkout(request):
if request.user.is_authenticated:
customer = request.user.customer
order, created = Order.objects.get_or_create(
customer=customer, complete=False)
items = order.orderitem_set.all()
else:
# Create empty cart for now for non-logged in user
items = []
order = {'get_cart_total': 0, 'get_cart_items': 0}
context = {'items': items, 'order': order}
return render(request, 'store/checkout.html', context)
def updateItem(request):
data = json.loads(request.data)
productId = data['productId']
action = data['action']
print('Action:', action)
print('productId:', productId)
return JsonResponse('Item was added', safe=False)'''

def updateItem(request):
data = json.loads(request.data)
request.data is available in Django rest framework, but it doesn't exist in regular Django views.
Change the view to use request.body instead.
def updateItem(request):
data = json.loads(request.body)

Django - How to get checked objects in template checkboxes?

Im new in Django,
I'm using xhtml2pdf for rendering data objects from template to PDF file , and i want to allow users to render only checked objects by checkboxes into pdf, is there anyway to filter that in Django ?
Thanks
views.py :
def render_to_pdf(template_src, context_dict={}):
template = get_template(template_src)
html = template.render(context_dict)
result = BytesIO()
pdf = pisa.pisaDocument(BytesIO(html.encode('ISO-8859-1')), result, link_callback=link_callback)
if pdf.err:
return HttpResponse('Error')
return HttpResponse(result.getvalue(), content_type='application/pdf')
class ViewPDF(View):
#method_decorator(login_required(login_url='livraison:login_page'))
def get(self, request, *args, **kwargs):
checked_objects = [i dont know how to get them]
queryset = Livraison.objects.filter(id__in=[checked_objects]) # i want something does that
data = {
'livraisons' : queryset,
'now' : f'Livraisons-{date.today()}'
}
pdf = render_to_pdf('pdf_template.html', data)
return HttpResponse(pdf, content_type='application/pdf')

use forms to get user data.
class LivraisonSelectForm(forms.Form):
livraison = forms.ModelChoiceField(label='select', queryset=Livraison.objects.all(), widget=forms.CheckboxInput())
then use it in your view:
class ViewPDF(FormView):
form_class = LivraisonSelectForm
template_name = 'path_to_template_with_html_to_filter_data'
#method_decorator(login_required(login_url='livraison:login_page'))
def form_valid(self, form):
checked_objects = form.cleaned_data.get('livraison', [])
queryset = Livraison.objects.filter(id__in=checked_objects) # i want something does that
data = {
'livraisons' : queryset,
'now' : f'Livraisons-{date.today()}'
}
pdf = render_to_pdf('pdf_template.html', data)
return HttpResponse(pdf, content_type='application/pdf')
and don't forget to show this form in your html {{ form }}

**
UPDATE
**
I Found a solution , i used Ajax code to collect every selected object
// check selected objects (#pdf is the id of the button which gonna generate the pdf file)
$('#pdf').click(function () {
var id = [];
$(':checkbox:checked').each(function (i) {
id[i] = $(this).val()
})
if (id.length === 0) {
alert('Please Select something..');
} else {
$.ajax({
url: '.',
method: 'GET',
data: {
id,
},
success: function (response) {
console.log('PDF is ready')
}
})
}
});
then i ad the variable into the view function to collect the selected objects and filter the queryset
myFunction.selected_ones = request.GET.getlist('id[]')
then filter queryset in the generated_pdf_func
queryset = MODEL.objects.filter(id__in=[x for x in myFunction.selected_ones if x != '0'])
NOTE : <if x != '0'> is important in case you want to select all because it returns 0 and you don't have any id = 0 in the DB

django: problem with ajax request sent to ModelFormset template

I am trying to pass user data from one template inside of another template. For this I use an ajax request, as well explained here How do I integrate Ajax with Django applications?
although no error shows up, nothing gets pulled.
here is what my model formset view look like inside of template 1:
def New_Sales(request):
#context = {}
form = modelformset_factory(historical_recent_data, fields=('id','Id', 'Date','Quantity', 'NetAmount', 'customer_name'))
if request.method == 'GET':
formset = form(queryset= historical_recent_data.objects.none())
#blank_form = formset.empty_form
elif request.method == 'POST':
formset = form(request.POST)
#blank_form = formset.empty_form
if formset.is_valid():
request.session['sale'] = request.POST.get('sale')
for check_form in formset:
check_form.save()
quantity = check_form.cleaned_data.get('Quantity')
id = check_form.cleaned_data.get('Id')
update = replenishment.objects.filter(Id = id).update(StockOnHand = F('StockOnHand') - quantity)
update2 = Item2.objects.filter(reference = id).update(stock_reel = F('stock_reel') - quantity)
return redirect('/invoice/pdf/assembly/')
#else:
#form = form(queryset= historical_recent_data.objects.none())
return render(request, 'new_sale.html', {'formset':formset})
and here is the view to access template 1 data into template 2:
def generate_pdf_assembly(request):
my_company = MyCompany.objects.get(id = 1)
request = request.session.get('sale')
context = {'request' : request, 'my_company' : my_company }
print(context)
and here is the ajax request to access the data from the template (in template 2):
<h3> {{ context }} </h3>
<script>
$.ajax({
method: "GET",
url: "/new_sale.html",
sucess: function(context){
alert(context);
},
failure: function(context){
alert('got an error');
}
});
</script>
I feel like there must be an issue with the request.session in the view since no evident error gets outputed neither in log nor chrome console but I am not competent to debug it further at this point.
UPDATE: after changing context for request in tag template, the value None shows up, definitely an issue with the requesting

def username_exists(request):
data = {'msg':''}
if request.method == 'GET':
username = request.GET.get('username').lower()
exists = Usernames.objects.filter(name=username).exists()
if exists:
data['msg'] = username + ' already exists.'
else:
data['msg'] = username + ' does not exists.'`enter code here`
return JsonResponse(data)

How to pass data through an AJAX request in django?

I want to retrieve data from the database when the bottom of the page is hit.
Now, what I have so far:
urls.py
urlpatterns = [
url(r'^$', feedViews.index, name='index'),
url(r'^load/$', feedViews.load, name='load'),
]
views.py
def index(request):
if request.method == 'GET':
context = {
'entry_list': Entry.objects.filter()[:5],
}
return render(request,'index.html',context)
else:
return HttpResponse("Request method is not a GET")
def load(request):
if request.method == 'GET':
context = {
'entry_list': Entry.objects.filter()[:1],
}
return render(request,'index.html',context)
else:
return HttpResponse("Request method is not a GET")
index.html
...
<script>
$(window).on("scroll", function() {
if ((window.innerHeight + window.scrollY) >= document.body.offsetHeight) {
console.log( "TEST" );
$.ajax(
{
type:"GET",
url: "/load",
data:{
},
})
}
});
</script>
...
Basicaly it loads 5 items at the beginning and what I try to achieve is that it loads 1 more as soon as I hit the bottom of the page.
So jQuery works beacuase the console.log('Test') works and in my terminal it says
"GET /load/ HTTP/1.1" 200 484
which is fine as well.
I think I messed up the ajax somehow. I am not sure though.
As you can probably tell I am a nooby but any help is highly appreciated.

Use something like this:
import json
from django.http import JsonResponse
def index(request):
if request.method == 'GET':
context = {
'entry_list': Entry.objects.filter()[:5],
}
return JsonResponse(json.dumps(context), safe=False)
else:
return JsonResponse({"err_msg": "Failed"})

Try it:
import json
from django.core import serializers
from django.http import JsonResponse
def index(request):
if request.method == 'GET' and request.is_ajax():
# Return objects
entry = Entry.objects.filter()[:5]
# serializers
entry2 = serializers.serialize('json', entry)
# convert JSON
entry3 = [d['fields'] for d in json.loads(entry2)]
data = dict()
data["entry"] = entry3
return JsonResponse(data)