Re: Hi guyz . iam just a beginner in google app engine..plz help me "abt deleting datas from DATASTORE"

[Daniel Roseman]

On Friday, 9 November 2012 11:33:53 UTC, muhammed riyas wrote:

hi,
     while trying to delete the datas from the datastore it shows the error...

BadArgumentError at /employee/removeall/

Expected an instance or iterable of (<class 'google.appengine.ext.db.Model'>, <class 'google.appengine.api.datastore_types.Key'>, <type 'basestring'>); received <bound method Employeeprofile.key of <ITISMYAPP.main.models.Employeeprofile object at 0xb090aac>> (a instancemethod).

Request Method:	GET
Request URL:	http://localhost:9778/employee/removeall/
Exception Type:	BadArgumentError
Exception Value:	Expected an instance or iterable of (<class 'google.appengine.ext.db.Model'>, <class 'google.appengine.api.datastore_types.Key'>, <type 'basestring'>); received <bound method Employeeprofile.key of <ITISMYAPP.main.models.Employeeprofile object at 0xb090aac>> (a instancemethod).
Exception Location:	/home/user/google_appengine/google/appengine/api/datastore.py in NormalizeAndTypeCheck, line 148

//in my view

from ITISMYAPP.main.models import Employeeprofile
from google.appengine.ext import db

def removeall(request):
    employees =Employeeprofile.all().fetch(2000)
    employeekeys = []
    for employee in employees:
        employeekeys.append(employee.key)
    db.delete(employeekeys)
    return render_to_response('main/index.html')
  
i dont know why?,,,,

You should ask AppEngine questions on the relevant AppEngine group, not here, as this is not a Django question.

But your problem is that `.key` is a method, not an attribute, so you should call it: `employee.key()`. 

--

DR.

[Kev Dwyer]

Hello,

Your question isn't related to Django, so it is not suitable for this group.
You should send questions about App Engine software to an App Engine-related
group.

Having said that, the error message that you are getting is telling you that
your employeekeys list does not contain keys, it contains references to the
key method of each Employee instance in your query resultset.

You need to change the line

employeekeys.append(employee.key)

to

employeekeys.append(employee.key())

Now your list will contain the keys.

Cheers,

Kev