Develop Reference

django Templates sum prices of cart items

Inside DJango templates, in an HTML Page, I have the following lines of code in body.
{% for cart_data in cart_items|slice:"0:"%}
<div class="Cart-Items pad ">
<div class="image-box">
<img src={{cart_data.img_url}} style="height:120px;"}} />
</div>
<div class="about">
<h1 class="title">{{cart_data.name}}</h1>
<h3 class="product_id">{{cart_data.retailer_sku}}</h3>
<div class="sku">
<div class="color">{{cart_data.color}} ({{cart_data.size}})</div>
</div>
</div>
<div class="prices">
<div class="amount">$ {{cart_data.price}}</div>
</div>
</div>
{% endfor %}
This code extacts the cart items and displays them on the page.
Now I want to do is sum all the proces and show total after this loop. How to do that?

here not possible to directly calculate sum of prices but,
you can do this things with view like this
***** views.py *****
def ShowCart(request):
usr = request.user
product_data = Cart.objects.filter(user=usr)
cart_count = Cart.objects.filter(user=usr).count()
categories = CategoryModel.objects.all()
amount = 0
shipping_amt = 40
final_amt = 0
data = Cart.objects.filter(user=usr)
for i in data:
prod_amt = ((i.product.price)*(i.quantity))
amount += prod_amt
final_amt = amount+shipping_amt
context = {'product_data': product_data, 'cart_count': cart_count,
'prod_amt': prod_amt, 'amount': amount, 'final_amt': final_amt,
'shipping_amt': shipping_amt,'categories':categories}
**** cart.html ****
{% for cart_data in cart_items|slice:"0:"%}
<div class="Cart-Items pad ">
<div class="image-box">
<img src={{cart_data.img_url}} style="height:120px;"}} />
</div>
<div class="about">
<h1 class="title">{{cart_data.name}}</h1>
<h3 class="product_id">{{cart_data.retailer_sku}}</h3>
<div class="sku">
<div class="color">{{cart_data.color}} ({{cart_data.size}})</div>
</div>
</div>
<div class="prices">
<div class="amount">$ {{cart_data.price}}</div>
</div>
</div>
{% endfor %}
<div class="col-4 p-2 border">
<div class="h3 p-2">The Total Amount of </div>
<table class="table table-hover">
<tbody>
<tr>
<td>Amount</td>
<td class="text-right">₹ {{amount}}</td>
</tr>
<tr>
<td>Shipping</td>
<td class="text-right">₹ {{shipping_amt}}</td>
</tr>
<tr>
<td><strong>Total</strong>(Including VAT)</td>
<td class="text-right"><strong>₹ {{final_amt}}</strong></td>
</tr>
</tbody>
</table>
<a class="btn btn-block btn-primary" href="{% url 'checkout' %}">Checkout</a>
</div>

Django modelformset_factory id is required field

I'm trying to create a table of records to update with a single click. I keep getting the error [{'id': ['This field is required.']}] I can't seem to figure it out. I have tried to put {{ form.label_tag }} in somewhere to see if that would help, but it doesn't. I can't figure out how to be sure id gets passed back in for the edit.
forms.py
class ReleaseAssignForm(ModelForm):
def __init__(self, *args, **kwargs):
super(ReleaseAssignForm, self).__init__(*args, **kwargs)
for key in self.fields:
self.fields[key].required = False
class Meta:
model = Releases
fields = [
'id',
'rel_title',
'rel_summary',
'rel_english_title',
'rel_english_summary',
'rel_country',
'rel_risk_category',
'rel_ops_category',
'rel_assoc_indicator',
'rel_industry',
'rel_risk_assigned',
'rel_ops_assigned',
'rel_indu_assigned',
'rel_indi_assigned',
]
views.py
def preview_releases(request):
today = datetime.date.today()
count = 0
releases = Releases.published.filter(rel_date=today)
ReleaseAssignFormSet = modelformset_factory(Releases, ReleaseAssignForm, fields = '__all__', extra=0)
if request.method == "POST":
formset = ReleaseAssignFormSet(request.POST, queryset=releases)
if formset.is_valid():
posts = formset.save(commit=False)
for post in posts:
post.save()
return redirect('preview_releases')
else:
print(formset.errors)
print("Form Invalid")
else:
formset = ReleaseAssignFormSet(queryset=releases)
count = formset.total_form_count()
context = {
'count': count,
'formset': formset,
}
return render(request, 'management/preview-releases.html', context)
template.html
<form action="" method="POST">
{% csrf_token %}
{{ formset.management_form }}
{% if formset %}
{% for form in formset.forms %}
<div class="row py-5" style="border-bottom: 1px black solid;font-size: 14px;">
<div class="row px-5 pb-2" style="border-bottom: 1px lightgray dotted;font-size: 14px;">
<div class="col px-5 pb-2">
<span style="font-size: 12px;color: darkred;">Risk Category</span><br>
{{ form.rel_risk_category }}
</div>
<div class="col px-5 pb-2" style="border-right: 1px darkgray dotted;">
<span style="font-size: 12px;color: darkred;">Assigned</span><br>
{{ form.rel_risk_assigned }}
</div>
<div class="col px-5 pb-2">
<span style="font-size: 12px;color: darkred;">Ops Category</span><br>
{{ form.rel_ops_category }}
</div>
<div class="col px-5 pb-2">
<span style="font-size: 12px;color: darkred;">Assigned</span><br>
{{ form.rel_ops_assigned }}
</div>
</div>
<div class="row px-5 pt-2 pb-5">
<div class="col px-5 pb-2">
<span style="font-size: 12px;color: darkred;">Associated Indicator</span><br>
{{ form.rel_assoc_indicator }}
</div>
<div class="col px-5 pb-2" style="border-right: 1px darkgray dotted;">
<span style="font-size: 12px;color: darkred;">Assigned</span><br>
{{ form.rel_indi_assigned }}
</div>
<div class="col px-5 pb-2">
<span style="font-size: 12px;color: darkred;">Industry</span><br>
{{ form.rel_industry }}
</div>
<div class="col px-5 pb-2" >
<span style="font-size: 12px;color: darkred;">Assigned</span><br>
{{ form.rel_indu_assigned }}
</div>
</div>
<div class="row">
<div class="col px-5">
<h3>{{ form.instance.rel_title }}</h3>
<p>{{ form.label_tag }}</p>
<p>{{ form.instance.rel_summary }}</p>
</div>
<div class="col px-5" style="border-left: 1px lightgray dashed;">
<a target="_blank" href="{% url 'clean_release' form.instance.id %}"><h3>{{ form.instance.rel_title }}</h3></a>
<p>{{ form.instance.rel_country }}</p>
{% autoescape off %}
<p>{{ form.instance.rel_summary }}</p>
{% endautoescape %}
</div>
<div class="col px-5" style="border-left: 1px lightgray dashed;">
<a target="_blank" href="{% url 'clean_release' form.instance.id %}"><h3>{{ form.instance.rel_english_title }}</h3></a>
<p>{{ form.instance.rel_country }}</p>
{% autoescape off %}
<p>{{ form.instance.rel_english_summary }}</p>
{% endautoescape %}
</div>
</div>
</div>
{% endfor %}
{% else %}
No resources found.
{% endif %}
<div class="text-end py-5">
<button type="submit" class="btn btn-primary">Submit Changes</button>
</div>
</div>
</form>

Separating modal HTML from main HTML

What I would like the following code to do is separate rendering of a page and the modals generated within it, the goal is a generic table framework based in Bootstrap in which I can put cells of different types, text, links, or buttons. I populate a basic table in app.py and then have a separate method in the same module I would use to create a modal that would pop up in the same window as the main one. The MWE consists of two functions in the python module and two separate HTML files.
I know it won't work as is because there's nothing to connect to gen_modal, but I'm not sure what I would need to put where to connect this together. Any thoughts?
app.py:
#bp.route('/view_table_test')
#login_required
def modal_test():
columns = [{'name':'column_a', 'display-name':'Column A', 'type':'text'},
{'name':'column_b', 'display-name':'Column B', 'type':'text'},
{'name':'column_c', 'display-name':'Column C', 'type':'text'},
{'name':'column_d', 'display-name':'Column D (Links)', 'type':'link'},
{'name':'column_e', 'display-name':'Column E (Buttons)', 'type':'button'}]
data = []
for i in range(10):
datum = {}
datum['column_a'] = {'text':'Text A' + str(i), 'link':None}
datum['column_b'] = {'text':'Text B' + str(i), 'link':None}
datum['column_c'] = {'text':'Text C' + str(i), 'link':None}
datum['column_d'] = {'text':'Link D' + str(i), 'link':'link_a'+str(i)}
datum['column_e'] = {'text':'Button E' + str(i), 'data-target':'#data_target_'+str(i)}
data.append(datum)
return render_template('view_table_test.html',
title="View Test Columns",
columns=columns,
data=data)
#bp.route('/<int:id>/gen_modal', methods=('GET', 'POST'))
def gen_modal(id):
data_target = 'data_target_'+str(id)
text = 'Modal Panel For ID ' + str(id)
return render_template('gen_modal.html',
data_target=data_target,
text=text)
view_table_test.html:
{% block header %}
<h1>{% block title %}{{ title }}{% endblock %}</h1>
{% endblock %}
{% block content %}
<table id="table">
<thead>
<tr>
{% for column in columns %}
<th data-field="{{ column['name'] }}"
data-filter-control="select"
data-filter-control-visible="true"
data-sortable="true">{{ column['display-name'] }}</th>
{% endfor %}
</tr>
</thead>
<tbody>
{% for row in data %}
<tr>
{% for column in columns %}
{% if column['type']=="link" %}
<td>{{ row[column['name']]['text'] }}</td>
{% elif column['type']=="button" %}
<td><button type="button" class="btn btn-info btn-sm" data-toggle="modal" data-target="{{ row[column['name']]['data-target'] }}">{{ row[column['name']]['text'] }}</button></td>
{% else %}
<td>{{ row[column['name']]['text'] }}</td>
{% endif %}
{% endfor %}
</tr>
{% endfor %}
</tbody>
</table>
{% endblock %}
gen_modal.html:
<!doctype html>
<!-- Modal -->
<div class="modal fade" id="{{ data_target }}" role="dialog">
<div class="modal-dialog modal-lg">
<!-- Modal content-->
<div class="modal-content">
<div class="modal-header">
<button type="button" class="close" data-dismiss="modal">×</button>
<h4 class="modal-title">{{ text }}</h4>
</div>
<div class="modal-body">
<p>Modal Stuff</p>
</div>
<div class="modal-footer">
<button type="button" class="btn btn-default" data-dismiss="modal">Close</button>
</div>
</div>
</div>
</div>
Here is the visual output. The buttons don't work.

Field 'id' expected a number but got 'Student'

I tried to apply python manage.py migrate I get the error Field 'id' expected a number but got 'Student'.
I've set the value of primary key to be id.
views.py:
#----------------------STUDENT OPERATION------------------------------------
#login_required()
def test_form(request):
students = TestModel.objects.all()
paginator = Paginator(students,20)
page_number = request.GET.get('pages')
page_obj = paginator.get_page(page_number)
enter code here
if request.method == 'POST':
form = TestForm(request.POST)
if form.is_valid():
x = form.instance.student
print(x)
p = form.save(commit=False)
p.save()
messages.success(request,'Student "{}" has been succesfully added!'.format(x))
return redirect('testform')
else:
form = TestForm()
return render(request,'testform.html', {'form':form,'students':page_obj})
#login_required()
def update_form(request,id):
if request.method == 'POST': #defpost
obj = TestModel.objects.get(pk = id)
form = TestForm(request.POST,instance=obj)
if form.is_valid():
form.save()
messages.success(request,'Student "{}" was succesfully updated'.format(obj.student))
return redirect('testform')
else: #def get()
obj = TestModel.objects.get(pk=id)
print(obj.student)
print('###')
form = TestForm(instance=obj)
return render(request,'testform_update.html',{'form':form})
#login_required()
def del_testform(request,id):
if request.method == 'POST':
obj = TestModel.objects.get(pk = id)
student = obj.student
obj.delete()
messages.warning(request,'Student "{}" has been deleted succesfully!'.format(student))
return redirect('testform')
def home(request):
posts = Post.objects.all().order_by('-date_posted')[:8]
destinations = Destinations.objects.all().order_by('date_posted')[:6]
return render(request,'home.html', {'posts':posts, 'destinations':destinations})
models.py:
class TestModel(models.Model):
GENDER_CHOICES = (('Male','Male'),('Female','Female'))
student = models.CharField(max_length=100,null=True)
address = models.CharField(max_length=100)
gender = models.CharField(choices=GENDER_CHOICES,max_length=50)
email = models.EmailField(null=True)
def __str__(self):
return self.student
testform.html:
{% extends 'index.html' %}
{% load static %}
{% load crispy_forms_tags %}
{% block content %}
<div class="container-fluid">
<div class="row justify-content-center">
<div class="col-md-8">
{% if messages %}
{% for message in messages %}
<div class="alert alert-{{ message.tags }} alert-dismissible fade show my-2" role="alert">
{{ message }}
<button type="button" class="close" data-dismiss="alert" aria-label="Close">
<span aria-hidden="true">×</span>
</button>
</div>
{% endfor %}
{% endif %}
<div class="col-md-5 mr-auto">
<form method="POST">
{% csrf_token %}
<legend class="">Enter Student Details</legend>
<div class="form-group">
{{form|crispy}}
<button type="submit" class="btn btn-primary">Add Student</button>
</div>
</form>
</div>
<div>
</div>
<div class="my-2 ">
<div class="text-center border bg-white">
<h3>Student Table</h3>
</div>
<table class="table table-white table-striped table-hover table-bordered">
<tr>
<td colspan="6">
<form class="form-inline" name = "table-search" >
<div class="form-group mr-auto">
<input type="text" class="form-control" placeholder = "Search Student">
<button class="btn btn-primary ml-2 mt-1 form-control " type="submit">Search</button>
</div>
<div class="form-group">
</div>
</form>
</td>
</tr>
<thead>
<tr>
<th>SN</th>
<th>Name</th>
<th>Address</th>
<th>Gender</th>
<th>Email</th>
<th>Action</th>
</tr>
</thead>
{% for student in students %}
<tr>
<td>{{forloop.counter}}.</td>
<td>{{student.student}}</td>
<td>{{ student.address}}</td>
<td>{{student.gender}}</td>
{% if student.email %}
<td>{{student.email}}</td>
{% elif student.email == None %}
<td class="text-danger">Not Available</td>
{% endif %}
<td>
<button type="button" class="btn btn-danger btn-sm" data-toggle="modal"
data-target="#staticBackdrop{{student.id}}">
<i class="fas fa-trash mr-2"></i> Delete
</button>
<a class="btn btn-primary btn-sm " href="{% url 'testform-update' student.id%}"><i class="fas fa-pen mr-2"></i> Update</a>
</td>
</tr>
<!-- modal-->
<div class="modal fade" id="staticBackdrop{{student.id}}" data-backdrop="static" data-keyboard="false" tabindex="-1" aria-labelledby="staticBackdropLabel" aria-hidden="true">
<div class="modal-dialog modal-dialog-centered">
<div class="modal-content">
<div class="modal-header">
<h5 class="modal-title" id="staticBackdropLabel"><span class="text-danger">Delete</span></h5>
<button type="button" class="close" data-dismiss="modal" aria-label="Close">
<span aria-hidden="true">×</span>
</button>
</div>
<div class="modal-body">
<div class="text-muted">Delete student <strong>"{{student.student}}"</strong>?
</div>
<div class="modal-footer">
<form method="POST" action="{% url 'testform-delete' student.id %}" name="deleteform">
{% csrf_token %}
<button class="btn btn-danger" type="submit">Delete</button>
<button type="button" class="btn btn-secondary" data-dismiss="modal">Close
</button>
</form>
</div>
</div>
</div>
</div>
<!-- modal-->
{% endfor %}
</table>
</div>
</div
</div>
</div>
{% endblock %}

Django/WeasyPrint: Bangla Font Rendering Issue

My Python Version 3.6+, Django version 1.11.6 and OS: Windows-10 64bit.
I am creating the PDF file with weasyprint within Django project. But the problem is Bengali font is not rendering. Please check this screenshot.
Now this is my views.py file
def get_pdf_file(request, customer_id, sys_type):
sys_type = customer_id
area = "pdf"
site_credit = site_credit1
time_now = timezone.now()
customers = get_object_or_404(CustomerInfo, pk=customer_id)
due_taka_track = customers.duetaka_set.all()
if due_taka_track == None:
due_taka_track = 0
unpaid_taka = int(customers.customer_price -
customers.customer_due_taka_info)
due_taka_track = customers.duetaka_set.all()
sum_cost_taka = due_taka_track.aggregate(
sp=Sum('customer_due')).get('sp', 0)
if sum_cost_taka == None:
sum_cost_taka = 0
total_paid_taka = sum_cost_taka + customers.customer_due_taka_info
payment_status = 'complete'
payment_message = ' '
remain_taka='Full Paid '
remain_msg=''
if customers.customer_due_taka_info < customers.customer_price:
payment_status = 'incomplete'
payment_message = 'সম্পূর্ন টাকা পরিষোধ করা হয়নি'
remain_msg='টাকা বাকী আছে'
baki_ase="পাওনা আছে "
remain_taka = customers.customer_price - customers.customer_due_taka_info
context = {'customers': customers,
'sys_type': sys_type,
'area': area,
'site_credit': site_credit,
'site_name': 'Moon Telecom',
'sys_type': sys_type,
'due_taka_track': due_taka_track,
'total_paid_taka': total_paid_taka,
'payment_message': payment_message,
'time_now': time_now,
'unpaid_taka': unpaid_taka,
'payment_message': payment_message,
'remain_taka': remain_taka,
'sum_cost_taka': sum_cost_taka,
'remain_msg': remain_msg}
html_string = render_to_string('shop/pdf_invoice.html', context).encode(encoding="UTF-8")
response = HttpResponse(content_type='application/pdf')
response['Content-Disposition'] = 'inline; filename=invoice' + \
str(customers.id)+customers.customer_uid + customers.customer_name + '.pdf'
HTML(string=html_string).write_pdf(response)
return response
and this is my html file
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-16">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>invoice copy {% if customers.customer_name %}Customer Name:{{customers.customer_name}}{% else %}
Name: দেওয়া হয়নি{% endif %} | {{customers.customer_uid}}</title>
<head>
<style>
#import url('https://fonts.maateen.me/siyam-rupali/font.css');
table,
th,
td {
border: 1px solid black;
}
th,
td {
padding: 5px;
text-align: left;
}
p,th,td,th,tr{
font-size:10px;line-height:12px
font-family: 'SiyamRupali', sans-serif;
}
.border_sx {
border-style: solid;
border-width: 1px;
padding: 5px;
border-radius: 5px;
display:block;
width: 100%;
margin-right:-100px;
padding: 10px;
}
#background{
position:absolute;
z-index:0;
background:white;
display:block;
min-height:50%;
min-width:50%;
color:yellow;
}
#content{
position:absolute;
z-index:0.1;
}
#bg-text
{
color:lightgrey;
font-size:70px;
margin-top: 160px;
margin-right: 40px;
transform:rotate(320deg);
-webkit-transform:rotate(300deg);
}
#bg-text-one
{
color:lightgrey;
font-size:20px;
line-height: 25px;
margin-right: 100px;
margin-bottom: 800px;
margin-top: -10px;
transform:rotate(320deg);
-webkit-transform:rotate(300deg);
}
#fix_font
{
font-size: 13.5px;
}
table {
font-family: arial, sans-serif;
border-collapse: collapse;
width: 100%;
}
td, th {
text-align: left;
padding: 8px;
}
tr:nth-child(even) {
}
</style>
</head>
<body>
<div id="background">
<p id="bg-text">Moon Telecom</p>
<p id="bg-text-one">Fulhata Bazar জাহাঙ্গীর সুপার মার্কেট, ব্রীজ রোড, ফুলহাতা বাজার, মোডেলগঞ্জ। 01717-051200(সুকান্ত বসু) 01828-163858(দোকান)</p>
</div>
<div id="content" class="border_sx">
<div class="invoice_intro">
<div class="site_title" style="text-align:center; margin:0 auto">
<h1 style="font-size:10px;line-height:12px">ওঁ</h1>
<p style="font-size:8px;line-height:10px">মা কালী সহায়</p>
<h2 style="font-size:19px;line-height:13px;">মুন টেলিকম</h2>
<div class="invoice_info_one" style="width:70%;margin:0 auto; text-align:center">
<p style=";">সকল প্রকার মোবাইল সেট, সীম কার্ড, মেমোরী কার্ড, MP-3, সোলার চার্জার, সোলার ফ্যান, মোবাইল ফোনের ব্যাটারী, চার্জার,
ক্যাচিং,কাভার,হেডফোন, রেবন, ডিসপ্লে এবং ইলেট্রিক মালামাল বিক্রেতা</p>
</div>
<div class="invoice_location">
<p>জাহাঙ্গীর সুপার মার্কেট, ব্রীজ রোড, ফুলহাতা বাজার, মোডেলগঞ্জ।</p>
</div>
<div class="invoice_contact">
<p>01717-051200(সুকান্ত বসু) 01828-163858(দোকান)
<b>Email:</b> moontelecom2008#gmail.com</p>
</div>
<hr>
</div>
</div>
<div class="customer_part" style="width:40%;margin:0px left;display:block">
<div class="customer_info">
{% if customers.customer_name %}
<p style="font-size:">Customer Name:
<b> {{customers.customer_name}}</b>
</p>
{% else %}
<p> Name: দেওয়া হয়নি</p> {% endif %}
<p style="font-size:x">Phone Number: {% if customers.customer_mobile_no %} {{customers.customer_mobile_no}} {% else %} No Mobile Number
{% endif%}
</p>
<p style="font-size:">Purchase Time: {{customers.customer_sell_date}}</p>
<p style="font-size:">invoice id:
<b>{{customers.customer_uid}}</b>
</p>
<p>{{customers.product_warrenty}}</p>
</div>
</div>
<div class="">
<table style="border-style: solid;border-width: 0px;">
<tr>
<th>Product Name</th>
<th colspan="">Price</th>
<th>Product Price (MRP)</th>
<th>ID or IME</th>
<th>Warrenty</th>
<th>QN</th>
</tr>
<tr>
<td>
<b>{{customers.customer_product_name}}</b>
</td>
<td>
<b>Customer Price: {{customers.customer_price}}</b> TK
<i>{% if customers.customer_discount_taka %}
( Discount added {{customers.customer_discount_taka}} TK )
{% else%}
{%endif%}</i>
</td>
<td>{{customers.customer_product_mrp}} Taka * {{customers.customer_product_quantity}} (QN) </td>
<td>{{customers.customer_product_id}}</td>
<td>
{% if customers.customer_product_warrenty %} {{customers.customer_product_warrenty}} Months {% else %} No {% endif %}
</td>
<td>{{customers.customer_product_quantity}}</td>
</tr>
<th>
First Time Payment
</th>
<th>
{{customers.customer_first_time_payment}} TK
<span style="color:red">{{customers.customer_first_due_info}}</span>
</th>
<td>
{{customers.customer_sell_date}}
</td>
{% if due_taka_track %}
<tr>
<th>SL</th>
<th>Taka</th>
<th>Paid Date</th>
<th>Due Info</th>
</tr>
<hr> {% for track in due_taka_track %}
<tr>
<td>{{forloop.counter}}</td>
<td>
<i>{{track.customer_due}}</i> TK</td>
<td>{{track.customer_due_date}}</td>
<td>{{track.customer_due_info}}</td>
</tr>
{% endfor %} {% else %} {% endif %} {% if sum_cost_taka %}
<tr>
<td>Total Due Complete </td>
<th>{{sum_cost_taka}} TK</th>
</tr>
{% else %} {% endif %}
<tr>
<td>
<b>Total Paid</b>
</td>
<th>
{% if payment_message %}
{{customers.customer_due_taka_info}} TK
<span style="color:red">{{payment_message}}</span>
<br>
<button type="button" class="btn btn-danger">{{remain_msg}} {{remain_taka}}TK</button>
{%else %} {{customers.customer_due_taka_info}} TK
<button type="button" class="btn btn-success">Payment Completed</button>
{% endif %}
</th>
</tr>
</table>
<table border="none!important" style="margin-top:10px;border:none!important">
<tr>
<th style="text-align:left">Customer signature</th>
<th style="text-align:right">Authorized signature</th>
</tr>
</table>
</div>
<div class="customer_notifications">
<div class="container">
<div class="row">
<div class="col-lg-12">
{% if customers.customer_conditions %}
<div class="warning">
<p>
<i>{{customers.customer_product_name}} {{customers.customer_conditions}}</i>
</p>
</div>
{% else %} {% endif %}
<div class="col-lg-12">
<div class="footer_info">
<p id="fix_font"><b>বিঃদ্রঃ ডেলিভারির সময় মাল বুঝিয়া নিবেন। পরে কোন আপত্তী গ্রহনযোগ্য নয়। (বিক্রিত মাল ফেরত হয় না) </h6>
<p>Print date: {{time_now}}</b></p>
</div>
</div>
</div>
</div>
</div>
</div>
<div class="footer" style="display:block">
<div class="footer_info">
<div class="container">
<div class="row">
<div class="col-lg-12">
<div class="footer_info">
<div class="copy_right">
{% if site_credit %}
<p>{{site_credit}}</p>
{% else %} {% endif %}
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</body>
</html>
I changed UTF-8/UTF but this issue did not fix.

I installed(Kalpurush) font on my PC. Then I added that font write_pdf variable.
HTML(string=html_string).write_pdf(response,stylesheets=[CSS(string='body,p,h1,h2,h3,h4,h5,tr,td { font-family: Kalpurush !important }')])