TypeError: Object not iterable - Django create/get -

i've been encountering issue time today, , permanent solution helpful.

i have vendor object defined as

class vendors(models.model):   vendor_id = models.integerfield(primary_key=true)   vendor_name = models.charfield(max_length=50l)   demo_vendor = models.integerfield()   url = models.charfield(max_length = 100l, null = true)   logo = models.charfield(max_length = 100l, null = true)   date_created = models.datetimefield()   class meta:     db_table = 'txn_vendors' 

in view, i'm implementing form allow creating new vendors along updating existing ones. this, had implement getvendordata method, required serializing data in json before sending client.

serialized = serializers.serialize("json", vendors.objects.filter(vendor_id = incomingdata["id"])) 

in view, if use filter in place of get, don't typeerror : vendors not iterable message.

to implement create , update functionality in 1 method, wrote

def savevendordata(request):   incomingdata = simplejson.loads(request.post.get("data", none))    if incomingdata not none:     vendor = none     newvendor = false      if incomingdata["id"] == "":       vendor = vendors.objects.create(vendor_name = incomingdata["vendor_name"], demo_vendor = false, date_created = datetime.now(), url = incomingdata["vendor_url"], logo = none)       newvendor = true     else:       vendor = vendors.objects.get(vendor_id = incomingdata["id"])       vendor.vendor_name = incomingdata["vendor_name"]       vendor.url = incomingdata["vendor_url"]        vendor.save()      serialized = serializers.serialize("json", vendor)      return httpresponse(simplejson.dumps({"success" : "true", "new_vendor" : newvendor, "data" : serialized}), mimetype = "application/json")    else:     return httpresponse(simplejson.dumps({"success" : "false", "message" : "issue data reception in server"})) 

when try create new vendors object valid data, typeerror response detailed above , generating stacktrace:

vendor data: [{"pk": 5, "model": "app.vendors", "fields": {"url": "nurturing seniors", "demo_vendor": 1, "vendor_name": "nurturing seniors", "date_created": null, "logo": null}}] [15/aug/2013 20:38:01] "post /getvendordata/ http/1.1" 200 218  internal server error: /savevendordata/  traceback (most recent call last): file "/usr/local/lib/python2.7/dist-packages/django/core/handlers/base.py", line 115, in get_response response = callback(request, *callback_args, **callback_kwargs)  file "/media/storage/code_projects/rowdmap_uboat/app/taxonomy_views.py", line 272, in savevendordata serialized = serializers.serialize("json", vendor)  file "/usr/local/lib/python2.7/dist-packages/django/core/serializers/__init__.py", line 99, in serialize s.serialize(queryset, **options)  file "/usr/local/lib/python2.7/dist-packages/django/core/serializers/base.py", line 42, in serialize obj in queryset:  typeerror: 'vendors' object not iterable 

i need send data client, since creating new vendors record results in insertion of new html element in several locations in view.

that error happens because second param of serialize method queryset. see here

get returns model instande, filter returns queryset

the arguments serialize function format serialize data (see serialization formats) , queryset serialize.

you write like:

serialized = serializers.serialize("json", [vendor])