60 lines
1.4 KiB
Python
60 lines
1.4 KiB
Python
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"""
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20. Object Pagination
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Django provides a framework for paginating a list of objects in a few.
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This is often useful for dividing search results or long lists of objects
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in to easily readable pages.
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"""
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from django.db import models
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class Article(models.Model):
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headline = models.CharField(maxlength=100, default='Default headline')
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pub_date = models.DateTimeField()
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def __repr__(self):
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return self.headline
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API_TESTS = """
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# prepare a list of objects for pagination
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>>> from datetime import datetime
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>>> for x in range(1, 10):
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... a = Article(headline='Article %s' % x, pub_date=datetime(2005, 7, 29))
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... a.save()
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# create a basic paginator, 5 articles per page
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>>> from django.core.paginator import ObjectPaginator, InvalidPage
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>>> paginator = ObjectPaginator(Article.objects.all(), 5)
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# the paginator knows how many hits and pages it contains
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>>> paginator.hits
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9
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>>> paginator.pages
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2
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# get the first page (zero-based)
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>>> paginator.get_page(0)
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[Article 1, Article 2, Article 3, Article 4, Article 5]
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# get the second page
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>>> paginator.get_page(1)
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[Article 6, Article 7, Article 8, Article 9]
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# does the first page have a next or previous page?
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>>> paginator.has_next_page(0)
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True
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>>> paginator.has_previous_page(0)
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False
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# check the second page
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>>> paginator.has_next_page(1)
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False
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>>> paginator.has_previous_page(1)
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True
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"""
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