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added on_delete=models.CASCADE to models.ForeignKey in the documentation (#4614)
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@ -39,7 +39,7 @@ In order to explain the various types of relational fields, we'll use a couple o
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artist = models.CharField(max_length=100)
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class Track(models.Model):
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album = models.ForeignKey(Album, related_name='tracks')
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album = models.ForeignKey(Album, related_name='tracks', on_delete=models.CASCADE)
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order = models.IntegerField()
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title = models.CharField(max_length=100)
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duration = models.IntegerField()
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@ -484,7 +484,7 @@ Note that reverse relationships are not automatically included by the `ModelSeri
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You'll normally want to ensure that you've set an appropriate `related_name` argument on the relationship, that you can use as the field name. For example:
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class Track(models.Model):
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album = models.ForeignKey(Album, related_name='tracks')
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album = models.ForeignKey(Album, related_name='tracks', on_delete=models.CASCADE)
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...
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If you have not set a related name for the reverse relationship, you'll need to use the automatically generated related name in the `fields` argument. For example:
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@ -508,7 +508,7 @@ For example, given the following model for a tag, which has a generic relationsh
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See: https://docs.djangoproject.com/en/dev/ref/contrib/contenttypes/
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"""
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tag_name = models.SlugField()
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content_type = models.ForeignKey(ContentType)
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content_type = models.ForeignKey(ContentType, on_delete=models.CASCADE)
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object_id = models.PositiveIntegerField()
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tagged_object = GenericForeignKey('content_type', 'object_id')
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@ -14,7 +14,7 @@ First, let's add a couple of fields. One of those fields will be used to repres
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Add the following two fields to the `Snippet` model in `models.py`.
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owner = models.ForeignKey('auth.User', related_name='snippets')
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owner = models.ForeignKey('auth.User', related_name='snippets', on_delete=models.CASCADE)
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highlighted = models.TextField()
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We'd also need to make sure that when the model is saved, that we populate the highlighted field, using the `pygments` code highlighting library.
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