在Django中：如何将dict对象序列化为json？

Question

我有一个非常基本的问题

>>> from django.core import serializers
>>> serializers.serialize("json", {'a':1})
Traceback (most recent call last):
  File "<console>", line 1, in <module>
  File "/usr/lib/pymodules/python2.6/django/core/serializers/__init__.py", line 87, in serialize
    s.serialize(queryset, **options)
  File "/usr/lib/pymodules/python2.6/django/core/serializers/base.py", line 40, in serialize
    for field in obj._meta.local_fields:
AttributeError: 'str' object has no attribute '_meta'
>>> 

怎么能做到？

Answer 1

from django.utils import simplejson
data = simplejson.dumps({'a': 1})

Answer 2

当您可以在视图中使用来自django.core的序列化程序时，像json或simplejson这样的库对于序列化django对象来说并不是很酷：

from django.core import serializers


def json_for_model_instance(request, pk):       
    instance = YourModel.objects.get(pk=pk)
    serialized_instance = serializers.serialize('json', [instance, ])

    return HttpResponse(serialized_instance, content_type="application/json")

Answer 3

另外，由于您似乎正在使用Python2.6，您可以直接使用json模块：

import json
data = json.dumps({'a': 1})