Django paginator not providing content on next page - django

Question

I use Django paginator to break my search results to few pages
from django.core.paginator import Paginator, EmptyPage, PageNotAnInteger
In my view I perform the search based on the output from the form
#login_required
def payment_range_list(request):
#import pdb; pdb.set_trace()
title = 'payment list'
#import pdb; pdb.set_trace()
if request.method == "POST":
form = PaymentRangeForm(request.POST)
#import pdb; pdb.set_trace()
if form.is_valid():
start_date = form.cleaned_data['start_date']
end_date = form.cleaned_data['end_date']
building = form.cleaned_data['building']
payment_list = LeasePaymentFilter(request.GET, queryset=LeasePayment.objects.filter(payment_date__range=[start_date, end_date],lease__unit__building = building ))
paginator = Paginator(payment_list, 25) # Show 25 contacts per page
page = request.GET.get('page')
try:
payment_page = paginator.page(page)
except PageNotAnInteger:
payment_page = paginator.page(1)
except EmptyPage:
payment_page = paginator.page(paginator.num_pages)
else:
payment_list = None
payment_page = None
start_date = None
end_date = None
building = None
else:
payment_list = None
payment_page = None
start_date = None
end_date = None
building = None
#form = PaymentRangeForm()
form = PaymentRangeForm(initial = {'building': 0 })
return render(request,'payment/payment_range.html', {'form':form, 'payment': payment_list,'page_payment':payment_page, 'start_date':start_date, 'end_date':end_date, 'building':building })
On the top of the page I have a form that I use for search and 2nd part is used to display the results.
{% extends "rent_base.html" %}
{% load crispy_forms_tags %}
{% block title %}
Lease List
{% endblock title %}
{% block content %}
<div class="container-fluid">
<div class="row">
<div class="col-sm-10 col-sm-offset-1 hid">
<h4 class="display-4">List > Payments> by Date Range </h4><div style="float:right;"> CSV for current range payments</div>
</div>
</div>
<div class="row">
<div class="col-sm-10 col-sm-offset-1 hid">
<form method="POST" class="form" action="" method="get">
{% csrf_token %}
{{ form|crispy}}
<br>
<button type="submit" class="btn btn-primary btn-primary">Search</button>
</form>
<br>
<b>Start date:</b> {{ start_date }} <b>End date:</b>{{ end_date }}
<br>
<table class="table table-striped">
<tr>
<th># Payment</th>
<th>Payment type</th>
<th>Amount </th>
<th>Deposit</th>
<th>Lease</th>
<th>Unit</th>
<th>Building</th>
<th>Term</th>
<th>Payment date</th>
<th>Payment method</th>
</tr>
{% for payment in page_payment %}
<tr>
<td> {{ payment.id }}</td>
<td> {{ payment.get_payment_type_display }}</td>
<td> {{ payment.amount }}</td>
<td>
{% if payment.is_deposit %}
<span class="glyphicon glyphicon-ok text-success" aria-hidden="true" ></span>
{% else %}
<span class="glyphicon glyphicon-remove text-warning" aria-hidden="true" ></span>
{% endif %}
</td>
<td> {{ payment.lease }}</td>
<td> {{ payment.lease.unit.number }}</td>
<td> {{ payment.lease.unit.building.name }}</td>
<td> {{ payment.leaseterm }}</td>
<td> {{ payment.payment_date }}</td>
<td> {{ payment.get_method_display }}</td>
</tr>
{% endfor %}
</table>
<div class="pagination">
<span class="step-links">
{% if page_payment.has_previous %}
previous
{% endif %}
<span class="current">
Page {{ page_payment.number }} of {{ page_payment.paginator.num_pages }}.
</span>
{% if page_payment.has_next %}
next
{% endif %}
</span>
</div>
</div>
</div></div>
{% endblock content %}
My problem is that when my search returns amount of results more than 1 page and I click on next pages. The next pages are always empty.
Any feedback where my problem is?

Answer 1

The problem is that your serch form is POST. So when you click next button you send GET request and if request.method == "POST": part of you view is not triggered.
I suggest you to change serch form to GET:
<form method="GET" action="">
<input type="text" name="q" placeholder="Search" value="{{ request.GET.q }}">
<input type="submit" value="Search">
</form>
And change next button to this:
{% if payment.has_next %}
next
{% endif %}
This will save search value in address bar even after you move to the next page.