我正在学习 Django Rest Framework 的序列化教程,但遇到了 JSONRenderers 和 JSONParsers 部分的困难。以下是其中提到的代码:
from snippets.models import Snippet
from snippets.serializers import SnippetSerializer
from rest_framework.renderers import JSONRenderer
from rest_framework.parsers import JSONParser
from django.utils.six import BytesIO
snippet = Snippet(code='foo = "bar"\n')
snippet.save()
snippet = Snippet(code='print "hello, world"\n')
snippet.save()
serializer = SnippetSerializer(snippet)
serializer.data
# {'pk': 2, 'title': u'', 'code': u'print "hello, world"\n', 'linenos': False, 'language': u'python', 'style': u'friendly'}
content = JSONRenderer().render(serializer.data)
content
# '{"pk": 2, "title": "", "code": "print \\"hello, world\\"\\n", "linenos": false, "language": "python", "style": "friendly"}'
stream = BytesIO(content)
data = JSONParser().parse(stream)
我知道JSONParser用于反序列化数据,而JSONRenderer则用于序列化数据,但我仍然不太明白数据的序列化和反序列化之间的区别。能否有人提供一个清晰的解释呢?(最好附上例子)
另外,JSONRenderer和JSONParser是如何工作的呢?