#17159: Paginator.Page() should throw an exception for invalid
[next|previous]_page_number()
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Reporter: mehta.apurva@… | Owner: nobody
Type: Bug | Status: new
Component: Core (Other) | Version: 1.3
Severity: Normal | Keywords: paginator core
Triage Stage: Unreviewed | Has patch: 0
Easy pickings: 1 | UI/UX: 0
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The next_page_number() and previous_page_number() currently return an
incremented or decremented number without verifying if the page is in the
range or not. They should instead throw an exception.
Repro Steps
=======
>>> from django.core.paginator import Paginator
>>> objects = ['john', 'paul', 'george', 'ringo', 'bill', 'gates',
'steve', 'jobs']
>>> p = Paginator(objects, 2)
>>> p.count
8
>>> p.num_pages
4
>>> p.page_range
[1, 2, 3, 4]
>>> p.page(1).has_previous()
False
>>> p.page(4).has_next()
False
>>> p.page(1).previous_page_number() ### Should throw Exception
0
>>> p.page(4).next_page_number() ### Should throw Exception
5
>>>
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Ticket URL: <https://code.djangoproject.com/ticket/17159>
Django <https://code.djangoproject.com/>
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