Object of type __proxy__ is not JSON serializable

if there is ugettext_lazy, just encounter error ‘Object of type proxy is not JSON serializable’

solved by,

from django.utils.functional import Promise
from django.core.serializers.json import DjangoJSONEncoder

class LazyEncoder(DjangoJSONEncoder):
    def default(self, obj):
        if isinstance(obj, Promise):
            return force_text(obj)
        return super(LazyEncoder, self).default(obj)`

data_browser\views.py

...
def query_html(request, *, model_name="", fields=""):
    ...
    config = json.dumps(config, cls=LazyEncoder)
...

[tolomea]

I found the difference there. “.ctx” is using JsonResponse which internally uses the DjangoJSONEncoder which deals with Promise objects. However “.html” is using json.dumps directly and so is getting the standard encoder. So the correct fix is to specify the DjangoJSONEncoder on the json.dumps call, I’ve added that and a test. They will be released as part of 2.2.7, probably in the next day or so.

[ghiewa]

find_bad_value(config)

thanks @tolomea !

1. changed html to ctx, there is NO gettext_lazy there
2. following your code, it display message ['allModelFields', 'base.Company', 'fields', '_type', 'choices', 0, 1] <class 'django.utils.functional.lazy.<locals>.__proxy__'> 付款公司 …