37 lines
1.1 KiB
Python
37 lines
1.1 KiB
Python
"""
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35. DB-API Shortcuts
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``get_object_or_404()`` is a shortcut function to be used in view functions for
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performing a ``get()`` lookup and raising a ``Http404`` exception if a
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``DoesNotExist`` exception was raised during the ``get()`` call.
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``get_list_or_404()`` is a shortcut function to be used in view functions for
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performing a ``filter()`` lookup and raising a ``Http404`` exception if a
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``DoesNotExist`` exception was raised during the ``filter()`` call.
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"""
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from django.db import models
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from django.utils.encoding import python_2_unicode_compatible
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@python_2_unicode_compatible
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class Author(models.Model):
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name = models.CharField(max_length=50)
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def __str__(self):
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return self.name
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class ArticleManager(models.Manager):
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def get_query_set(self):
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return super(ArticleManager, self).get_query_set().filter(authors__name__icontains='sir')
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@python_2_unicode_compatible
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class Article(models.Model):
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authors = models.ManyToManyField(Author)
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title = models.CharField(max_length=50)
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objects = models.Manager()
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by_a_sir = ArticleManager()
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def __str__(self):
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return self.title
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