Unable to run api request ckanext_package_showcase_list

[clauded]

Running this api request on a ckan 2.8 instance:

curl -X POST https://myckan.org/api/3/action/ckanext_package_showcase_list -d '{"package_id": "baf1098b-43f6-4f10-a313-9e12f5802c3a"}'

Returns the following error:

Traceback (most recent call last):
  File "/usr/lib/ckan/default/src/ckan/ckan/config/middleware/__init__.py", line 202, in __call__
    return self.apps[app_name](environ, start_response)
  File "/usr/lib/ckan/default/lib/python2.7/site-packages/repoze/who/middleware.py", line 86, in __call__
    app_iter = app(environ, wrapper.wrap_start_response)
  File "/usr/lib/ckan/default/lib/python2.7/site-packages/webob/dec.py", line 147, in __call__
    resp = self.call_func(req, *args, **self.kwargs)
  File "/usr/lib/ckan/default/lib/python2.7/site-packages/webob/dec.py", line 208, in call_func
    return self.func(req, *args, **kwargs)
  File "/usr/lib/ckan/default/lib/python2.7/site-packages/fanstatic/publisher.py", line 234, in __call__
    return request.get_response(self.app)
  File "/usr/lib/ckan/default/lib/python2.7/site-packages/webob/request.py", line 1053, in get_response
    application, catch_exc_info=False)
  File "/usr/lib/ckan/default/lib/python2.7/site-packages/webob/request.py", line 1022, in call_application
    app_iter = application(self.environ, start_response)
  File "/usr/lib/ckan/default/lib/python2.7/site-packages/webob/dec.py", line 147, in __call__
    resp = self.call_func(req, *args, **self.kwargs)
  File "/usr/lib/ckan/default/lib/python2.7/site-packages/webob/dec.py", line 208, in call_func
    return self.func(req, *args, **kwargs)
  File "/usr/lib/ckan/default/lib/python2.7/site-packages/fanstatic/injector.py", line 54, in __call__
    response = request.get_response(self.app)
  File "/usr/lib/ckan/default/lib/python2.7/site-packages/webob/request.py", line 1053, in get_response
    application, catch_exc_info=False)
  File "/usr/lib/ckan/default/lib/python2.7/site-packages/webob/request.py", line 1022, in call_application
    app_iter = application(self.environ, start_response)
  File "/usr/lib/ckan/default/lib/python2.7/site-packages/flask/app.py", line 1997, in __call__
    return self.wsgi_app(environ, start_response)
  File "/usr/lib/ckan/default/lib/python2.7/site-packages/beaker/middleware.py", line 156, in __call__
    return self.wrap_app(environ, session_start_response)
  File "/usr/lib/ckan/default/lib/python2.7/site-packages/flask/app.py", line 1985, in wsgi_app
    response = self.handle_exception(e)
  File "/usr/lib/ckan/default/lib/python2.7/site-packages/flask/app.py", line 1540, in handle_exception
    reraise(exc_type, exc_value, tb)
  File "/usr/lib/ckan/default/lib/python2.7/site-packages/flask/app.py", line 1982, in wsgi_app
    response = self.full_dispatch_request()
  File "/usr/lib/ckan/default/lib/python2.7/site-packages/flask/app.py", line 1614, in full_dispatch_request
    rv = self.handle_user_exception(e)
  File "/usr/lib/ckan/default/lib/python2.7/site-packages/flask/app.py", line 1517, in handle_user_exception
    reraise(exc_type, exc_value, tb)
  File "/usr/lib/ckan/default/lib/python2.7/site-packages/flask/app.py", line 1612, in full_dispatch_request
    rv = self.dispatch_request()
  File "/usr/lib/ckan/default/lib/python2.7/site-packages/flask_debugtoolbar/__init__.py", line 125, in dispatch_request
    return view_func(**req.view_args)
  File "/usr/lib/ckan/default/src/ckan/ckan/views/api.py", line 349, in action
    return _finish_ok(return_dict)
  File "/usr/lib/ckan/default/src/ckan/ckan/views/api.py", line 110, in _finish_ok
   return _finish(status_int, response_data, content_type, headers)
  File "/usr/lib/ckan/default/src/ckan/ckan/views/api.py", line 66, in _finish
    for_json=True)  # handle objects with for_json methods
  File "/usr/lib/ckan/default/lib/python2.7/site-packages/simplejson/__init__.py", line 397, in dumps
    **kw).encode(obj)
  File "/usr/lib/ckan/default/lib/python2.7/site-packages/simplejson/encoder.py", line 291, in encode
    chunks = self.iterencode(o, _one_shot=True)
  File "/usr/lib/ckan/default/lib/python2.7/site-packages/simplejson/encoder.py", line 373, in iterencode
    return _iterencode(o, 0)
  File "/usr/lib/ckan/default/lib/python2.7/site-packages/simplejson/encoder.py", line 268, in default
    raise TypeError(repr(o) + " is not JSON serializable")
TypeError: <ckan.lib.navl.dictization_functions.Missing object at 0x7f6a35affd50> is not JSON serializable

[sabinem]

Maybe this issue that I just made relates to your issue: #128. I proposed a PR there: Maybe it will also fix your case.