Thanks Daniel, I'll give that a try. On Wed, Jan 6, 2010 at 2:02 AM, Daniel Roseman <dan...@roseman.org.uk>wrote:
> On Jan 6, 1:54 am, Malcolm MacKinnon <mmack3...@gmail.com> wrote:
> > I'm having difficulty deserializing a json object. I'm using django
> > appengine patch, so the models aren't the same as django's, but they are
> > very similar:
> >
> > class Cust(db.Model):
> > custno = db.StringProperty(required=True)
> > company = db.StringProperty(required=True)
> > contact = db.StringProperty(required=False)
> > address1 = db.StringProperty(required=False)
> > address2 = db.StringProperty(required=False)
> > city = db.StringProperty(required=True)
> > state = db.StringProperty(required=False)
> > zipc = db.StringProperty(required=False)
> > country = db.StringProperty(required=False)
> > phone = db.StringProperty(required=False)
> > salesmn = db.StringProperty(required=True)
> > email = db.StringProperty()
> >
> > def __unicode__(self):
> > return self.custno + " : " + str(self.company)+" :
> > "+str(self.city)+" : "+str(self.state)
>
> Aargh! unicode methods must return unicode! Not bytestrings! Do this:
> return u'%s: %s: %s: %s' % (self.custno, self.company, self.city,
> self.state)
>
>
> >
> > class Cust_List(db.Model):
> > custno = db.StringProperty(required=True)
> > companies = db.TextProperty(required=True) #customer list as json
> object
> >
> > Note that the json object is stored in the db.TextProperty companies, and
> is
> > composed of more than a 1000 customers, all of which are also
> individually
> > stored in the model, Cust . I query the json object for a customer list,
> > since it saves CPU time on the appengine.
> >
> > Here's what happens when I try to decode the json string object:>>> from
> sport.models import Cust_List
> > >>> from django.core import serializers
> > >>> a=Cust_List.all()
> > >>> b=a.get() #returns the only and only data item in this model, which
> is a
> >
> > json object previously stored in the datastore.>>>
> c=serializers.deserialize('json', b.companies)
> > >>> d=list(c)
> > >>> e=len(d)
> > >>> e
> > 1057
> > >>> b
> >
> > etc...
> > cy...@global.net", "phone": "269/552-0000", "state": "MN", "contact":
> "Rick
> > L
> > ee", "salesmn": "O1", "country": "", "address2": ""}}, {"pk": "XBwTAxc
> > hELEgpzcG9ydGNUYDA", "model": "sport.cust", "fields": {"city": "GOLD RIVE
> > R", "zipc": "95670", "address1": "11282 PYRITES WAY", "company":
> "ZSPORTS",
> > "cus
> > tno": "ZSP001", "email": "ra...@zsports.com", "phone": "916/638-0033",
> "sta
> > te": "CA", "contact": "Randy Mintz", "salesmn": "H1", "country": "",
> > "address2":
> > ""}}]')>>> d
> >
> > etc...
> > <DeserializedObject: WAS160 : WASATCH RUNNING CENTER : SANDY : UT>,
> > <Deserializ
> > edObject: WAT091 : WATERVILLE VALLEY RESORT : WATERVILLE VALLEY : NH>,
> > <Deserial
> > izedObject: WES003 : WESTCHESTER ROAD RUNNER : WHITE PLAINS : NY>,
> > <Deserialized
> > Object: WES100 : WEST HILL SHOP : PUTNEY : VT>, <DeserializedObject:
> WHE189
> > : WH
> > EELIE FUN MULTI SPORT : LEBANON : OH>, <DeserializedObject: WHI002 :
> > WHIRLAWAY S
> > PORTS CTR : METHUEN : MA>, <DeserializedObject: WHI296 : WHITE GRASS SKI
> > TOURING
> > : DAVIS : WV>, <DeserializedObject: WHI443 : WHISTLER XC SKI & HIKE LTD.
> :
> > WHIS
> > TLER, BC : >, <DeserializedObject: WIL490 : WILDERNESS SPORTS : DILLON :
> > CO>, <D
> > eserializedObject: WIL520 : WILD ROSE MOUNTAIN SPORTS : SALT LAKE CITY :
> > UT>, <D
> > eserializedObject: WIL659 : ADVENTURE OUTFITTERS : HADLEY : MA>,
> > <DeserializedOb
> > ject: WIL760 : WILDERNESS WAY, INC : SOLDOTNA : AK>, <DeserializedObject:
> > WIL9LA
> > : WILSON BACKCOUNTRY : WILSON : WY>, <DeserializedObject: WIL9TM :
> WILSON
> > MOUNT
> > AIN SPORTS : LAKE LOUISE, ALBERTA : >, <DeserializedObject: WIL9TQ :
> > WILDERNESS
> > SPORTS-DILLON : DILLON : CO>, <DeserializedObject: WIN106 : WINTHROP
> > MOUNTAIN SP
> > ORTS : WINTHROP : WA>, <DeserializedObject: WIN361 : WINTERSTEIGER : SALT
> > LAKE C
> > ITY : UT>, <DeserializedObject: WOM001 : WOMEN'S SPORTS SPEC. :
> WILMINGTON :
> > DE>
> > , <DeserializedObject: WOM016 : WOMEN'S SOURCE FOR SPORTS : SOUTH
> BURLINGTON
> > : V
> > T>, <DeserializedObject: WOO155 : WOODSTOCK INN & RESORT : WOODSTOCK :
> VT>,
> > <Des
> > erializedObject: WOR059 : WORLD CYCLE : BOISE : ID>, <DeserializedObject:
> > YEL017
> > : YELLOWSTONE GATEWAY SPORTS : BOZEMAN : MT>, <DeserializedObject:
> ZAP013 :
> > ZAP
> > POS.COM : HENDERSON : NV>, <DeserializedObject: ZOM004 : ZOMBIE RUNNER :
> > PALO AL
> > TO : CA>, <DeserializedObject: ZOO005 : ZOO CITY CYCLE & SPORT :
> KALAMAZOO :
> > MI>
> > , <DeserializedObject: ZSP001 : ZSPORTS : GOLD RIVER : CA>] etc.
> >
> > Note that I just get returned a unicode representation of my model, Cust.
> > But the contact information, address information, and so on disappears in
> > the deserialized object. Any thoughts on why or what I'm doing wrong?
> >
> > Thanks for any help or ideas!
> >
> You're not getting a unicode representation, you're getting a
> DeserialzedObject. As the documentation (http://docs.djangoproject.com/
> en/1.1/topics/serialization/#deserializing-data) says, you need to
> iterate through the list of objects and call save() on each one to
> create the actual model.
> --
> DR.
>
> --
> You received this message because you are subscribed to the Google Groups
> "Django users" group.
> To post to this group, send email to django-us...@googlegroups.com.
> To unsubscribe from this group, send email to
> django-users+unsubscr...@googlegroups.com<django-users%2bunsubscr...@googlegroups.com>
> .
> For more options, visit this group at
> http://groups.google.com/group/django-users?hl=en.
>
>
>
>
-- You received this message because you are subscribed to the Google Groups "Django users" group.
To post to this group, send email to django-us...@googlegroups.com.
To unsubscribe from this group, send email to django-users+unsubscr...@googlegroups.com.
For more options, visit this group at http://groups.google.com/group/django-users?hl=en.
