Upgrade ich eine django App haben, die auf 1.4.2
Version lief und völlig in Ordnung zu arbeiten, aber ich es vor kurzem aktualisiert 1.6.5
django und einige seltsame Fehler konfrontiert wie untendjango Objekt ist nicht JSON serializable Fehler nach django zu 1.6.5
Eigentlich bekomme ich dies während Benutzer/Client-Registrierung in meiner Website-Funktionalität
Request URL: http://example.com/client/registration/
Django Version: 1.6.5
Exception Type: TypeError
Exception Value: <Client: test one> is not JSON serializable
Exception Location: /usr/lib/python2.7/json/encoder.py in default, line 184
Python Executable: /home/user/.virtualenvs/test_proj/bin/python
Python Version: 2.7.5
Zurückverfolgungs
Traceback:
File "/home/user/.virtualenvs/test_proj/local/lib/python2.7/site-packages/django/core/handlers/base.py" in get_response
199. response = middleware_method(request, response)
File "/home/user/.virtualenvs/test_proj/local/lib/python2.7/site-packages/django/contrib/sessions/middleware.py" in process_response
38. request.session.save()
File "/home/user/.virtualenvs/test_proj/local/lib/python2.7/site-packages/django/contrib/sessions/backends/db.py" in save
57. session_data=self.encode(self._get_session(no_load=must_create)),
File "/home/user/.virtualenvs/test_proj/local/lib/python2.7/site-packages/django/contrib/sessions/backends/base.py" in encode
87. serialized = self.serializer().dumps(session_dict)
File "/home/user/.virtualenvs/test_proj/local/lib/python2.7/site-packages/django/core/signing.py" in dumps
88. return json.dumps(obj, separators=(',', ':')).encode('latin-1')
File "/usr/lib/python2.7/json/__init__.py" in dumps
250. sort_keys=sort_keys, **kw).encode(obj)
File "/usr/lib/python2.7/json/encoder.py" in encode
207. chunks = self.iterencode(o, _one_shot=True)
File "/usr/lib/python2.7/json/encoder.py" in iterencode
270. return _iterencode(o, 0)
File "/usr/lib/python2.7/json/encoder.py" in default
184. raise TypeError(repr(o) + " is not JSON serializable")
Exception Type: TypeError at /client/registration/
Exception Value: <Client: test one> is not JSON serializable
Ich bin verwirrt, warum der oben json Fehler nach updation und übrigens worden erscheinen i in einigen meiner Modelle wie unten
proj/utils.py
ein individuelles json Feld bin mitfrom django.db import models
from django.utils import simplejson as json
from django.core.serializers.json import DjangoJSONEncoder
class JSONField(models.TextField):
'''JSONField is a generic textfield that neatly serializes/unserializes
JSON objects seamlessly'''
# Used so to_python() is called
__metaclass__ = models.SubfieldBase
def to_python(self, value):
'''Convert our string value to JSON after we load it from the DB'''
if value == '':
return None
try:
if isinstance(value, basestring):
return json.loads(value)
except ValueError:
pass
return value
def get_db_prep_save(self, value, connection=None):
'''Convert our JSON object to a string before we save'''
if not value or value == '':
return None
if isinstance(value, (dict, list)):
value = json.dumps(value, mimetype="application/json")
return super(JSONField, self).get_db_prep_save(value, connection=connection)
from south.modelsinspector import add_introspection_rules
add_introspection_rules([], ["^proj\.util\.jsonfield\.JSONField"])
settings.py
SERIALIZATION_MODULES = {
'custom_json': 'proj.util.json_serializer',
}
json_serializer.py
from django.core.serializers.json import Serializer as JSONSerializer
from django.utils.encoding import is_protected_type
# JSONFields that are normally incorrectly serialized as strings
json_fields = ['field_1', 'field_2']
class Serializer(JSONSerializer):
"""
A fix on JSONSerializer in order to prevent stringifying JSONField data.
"""
def handle_field(self, obj, field):
value = field._get_val_from_obj(obj)
# Protected types (i.e., primitives like None, numbers, dates,
# and Decimals) are passed through as is. All other values are
# converted to string first.
if is_protected_type(value) or field.name in json_fields:
self._current[field.name] = value
else:
self._current[field.name] = field.value_to_string(obj)
So, wie der obigen Fehler zu lösen? Kann mir jemand erklären, was passiert, um den Fehler zu verursachen?
ja Einstellungen diese Zeile in settings.py hat das Thema 'SESSION_SERIALIZER =‚django.contrib.sessions.serializers gelöscht django aktualisiert .PickleSerializer''. Danke –
Welche Art von Dingen sind in JSON nicht serialisierbar als in Pickle? Danke – aRkadeFR
@aRkadeFR: Für mich war es eine komplexe Datenstruktur mit vielen eigenen Klassen. – Matthias