Dynamic delete property fail

[J.T]

Hi,

from google.appengine.ext     import db
class Person(db.Expando):
  first_name = db.StringProperty()
  last_name = db.StringProperty()
  hobbies = db.StringListProperty()

p = Person(first_name="Albert", last_name="Johnson")
p.hobbies = ["chess", "travel"]

del p.first_name



Traceback (most recent call last):
  File "/base/python_runtime/python_lib/versions/1/google/appengine/ext/admin/__init__.py", line 247, in post
    exec(compiled_code, globals())
  File "<string>", line 6, in <module>
  File "/base/python_runtime/python_lib/versions/1/google/appengine/ext/db/__init__.py", line 1831, in __delattr__
    object.__delattr__(self, key)
AttributeError: __delete__


This script is from https://code.google.com/intl/en/appengine/docs/python/datastore/datamodeling.html#The_Expando_Class
and test it in interactive console.

[Robert Kluin]

Hi,
I think this is because you're trying to delete a property included
on the schema. The following should demonstrate this:

class Test(db.Expando):
first_name = db.StringProperty()

t = Test(first_name='Jim')
t.last_name = 'smith'

del t.last_name # ok
del t.first_name # boom

Robert

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