找到Django-REST框架文档,尽管它有多长,但对于我而言仍然太浅。Django-REST框架restore_object attrs参数
restore_object方法的attrs函数做了什么?
instance.title = attrs.get('title', instance.title)
第二个参数代表什么,我将如何去寻找这将在文档中的未来意味着什么?
还不确定return Snippet(**attrs)
的双星号是什么意思。这不同于** keywArgs?什么参数被传回到反序列化的Snippet对象?
在文档的另一部分,我看到了restore_object()instance.title = attrs['title']
,我希望可以看到我的困惑。
谢谢
class SnippetSerializer(serializers.Serializer):
pk = serializers.Field() # Note: `Field` is an untyped read-only field.
title = serializers.CharField(required=False,
max_length=100)
code = serializers.CharField(widget=widgets.Textarea,
max_length=100000)
linenos = serializers.BooleanField(required=False)
language = serializers.ChoiceField(choices=LANGUAGE_CHOICES,
default='python')
style = serializers.ChoiceField(choices=STYLE_CHOICES,
default='friendly')
def restore_object(self, attrs, instance=None):
"""
Create or update a new snippet instance.
"""
if instance:
# Update existing instance
instance.title = attrs.get('title', instance.title)
instance.code = attrs.get('code', instance.code)
instance.linenos = attrs.get('linenos', instance.linenos)
instance.language = attrs.get('language', instance.language)
instance.style = attrs.get('style', instance.style)
return instance
# Create new instance
return Snippet(**attrs)
我想知道同样的事情。 – alejoss 2014-10-14 16:39:46