Re: [Modeling-users] Declaring and using a nested EditingContext

[<sbi...@us...>]

    Hi Paul & all,

Thanks for the detailed report.

Now I can see the problem. It is, in fact, not related to parent/child EC=
 in particular, but to a more general problem, as described at:
http://modeling.sourceforge.net/UserGuide/framework-integration-sessionin=
g-ec.html

Just after 0.9 I posted a first patch partially correcting the problem, s=
ee the post here:
http://thread.gmane.org/gmane.comp.python.modeling/374/focus=3D374

I'll have some time next week-end to test it in your configuration; if yo=
u find some time in the meantime to test it I'll be glad to read your exp=
erience :) =20

Thanks again for the report, and hopefully the patch will be tested enoug=
h to be integrated into the framework soon.

    Cheers,

-- S=E9bastien.


pms...@so... a =E9crit :
> Please ignore the previous reply, it was only partly completed; I had a=
=20
> little keyboard shortcut accident :-)
>=20
> Hi S=E9bastien,
>=20
> The test you mention run fine here, but still I get no changes in the=20
> child in the following example, maybe I am doing something weird here.=20
> Thanks a lot for looking into this :-)
>=20
> Cheers,
> Paul
>=20
>=20
> EXAMPLE
> =3D=3D=3D=3D=3D=3D=3D
>=20
> pymodel_parentchild.py
> -----------------------------------------------------------------------=
-----
> from Modeling.PyModel import *
>=20
> Association.defaults['delete'] =3D ['nullify', 'nullify']
> Entity.defaults['properties'] =3D []
>=20
> model =3D Model('parentchild', version=3D'0.1')
> model.associations =3D []
> model.entities =3D [
>=20
>          Entity('Person',
>                  properties =3D [
>                          APrimaryKey('uid',
> 				isClassProperty=3D0,
> 				isRequired=3D1, doc=3D'PK'),
>                          AString('first_name', width=3D60),
>                          AString('last_name', width=3D60),
>                  ],
>          ),
>=20
> ]
> -----------------------------------------------------------------------=
-----
>=20
>=20
> Person.py
> -----------------------------------------------------------------------=
-----
> from Modeling import dynamic
> __metaclass__ =3D dynamic.CustomObjectMeta
>=20
> class Person:
>          entityName =3D 'Person'
>          mdl_define_properties =3D 1
> -----------------------------------------------------------------------=
-----
>=20
>=20
>=20
> test_parentchild.py
> -----------------------------------------------------------------------=
-----
> from parentchild.Person import Person
> from Modeling.EditingContext import EditingContext as EC
>=20
> parent_ec =3D EC()
> child_ec =3D EC(parent_ec)
>=20
> def populate(ec):
>          ec.insert(Person(first_name=3D'Anna', last_name=3D'Anderson'))
>=20
> def result():
>          global parent_ec, child_ec
>=20
>          print "PARENT:",
>          for p in parent_ec.fetch('Person'): print p.first_name,=20
> p.last_name,
>          print
>          print "CHILD :",
>          for p in child_ec.fetch('Person'): print p.first_name, p.last_=
name,
>          print
>          print
>=20
> print "POPULATING AND SAVING CHANGES"
> populate(parent_ec)
> #parent_ec.processRecentChanges()
> parent_ec.saveChanges()
>=20
> result()
>=20
> print "CHANGING 'Anna' --> 'anna' in parent AND SAVING CHANGES"
> anna =3D parent_ec.fetch('Person', 'first_name=3D=3D"Anna"')[0]
> anna.first_name =3D 'anna'
> #parent_ec.processRecentChanges()
> parent_ec.saveChanges()
>=20
> result()
> -----------------------------------------------------------------------=
-----
>=20
>=20
> OUTPUT FROM TEST
> ------------------------------------------------------------
> POPULATING AND SAVING CHANGES
> PARENT: Anna Anderson
> CHILD : Anna Anderson
>=20
> CHANGING 'Anna' --> 'anna' in parent AND SAVING CHANGES
> PARENT: anna Anderson
> CHILD : Anna Anderson
> ------------------------------------------------------------
>=20
>=20
>=20
>=20
> S=E9bastien Bigaret wrote:
>>    Hi Paul & all,
>>
>> pms...@so... wrote:
>> [...]
>>> However, I can't quite get what is meant by the sentence:
>>>
>>>   - the states of the objects in the result set will reflect any chan=
ges=20
>>> made to them in the parent object store, even the uncommitted ones.
>>>
>>>  From testing, when I change an object held by the parent EC, and the=
n=20
>>> do a fetch on that object in the child, the change is not shown in th=
e=20
>>> object held by the child EC.
>> Your understanding is correct, and the changes should appear in the ch=
ild context. If they are not, it is definitely a bug.
>>
>> Could you please send me your example, where the bug appear?  This is =
something I did not observe from now on, and I'll be glad to examine and =
fix it.
>>
>>     Cheers,
>>
>> -- S=E9bastien.
>>
>>
>> PS: Oh, BTW, this is tested in tests/test_EditingContext_ParentChildpy=
, method test_03_fetchedAndModifiedObjectsInParent()
>>
>> pms...@so... a =E9crit :
>>> Hi all,
>>>
>>> I am reading chapter "5.2 Declaring and using a nested EditingContext=
"=20
>>> in the user guide on the web:
>>>
>>> http://modeling.sourceforge.net/UserGuide/nested-ec-usage.html
>>>
>>> I understand and can verify by testing (I am using modeling release 0=
.9)=20
>>> that:
>>>
>>> 1. Inserting an object in the parent EC will show up in a fetch in th=
e=20
>>> child EC.
>>>
>>> 2. Deleting an object in the parent EC deletes it from the result set=
 in=20
>>> the child EC.
>>>
>>> However, I can't quite get what is meant by the sentence:
>>>
>>>   - the states of the objects in the result set will reflect any chan=
ges=20
>>> made to them in the parent object store, even the uncommitted ones.
>>>
>>>  From testing, when I change an object held by the parent EC, and the=
n=20
>>> do a fetch on that object in the child, the change is not shown in th=
e=20
>>> object held by the child EC.
>>>
>>> Can anyone get me on the right track here?
>>>
>>> And last, but not least, thanks for all the work on this magnificent=20
>>> framework :-)
>>>
>>> Cheers
>>> Paul
>>>
>>> Using Tomcat but need to do more? Need to support web services, secur=
ity?
>>> Get stuff done quickly with pre-integrated technology to make your jo=
b easier
>>> Download IBM WebSphere Application Server v.1.0.1 based on Apache Ger=
onimo
>>> http://sel.as-us.falkag.net/sel?cmd=3Dlnk&kid=3D120709&bid=3D263057&d=
at=3D121642
>>> _______________________________________________
>>> Modeling-users mailing list
>>> Mod...@li...
>>> https://lists.sourceforge.net/lists/listinfo/modeling-users
>>>
>>>
>=20
>=20
> -----------------------------------------------------------------------=
--
> Using Tomcat but need to do more? Need to support web services, securit=
y?
> Get stuff done quickly with pre-integrated technology to make your job =
easier
> Download IBM WebSphere Application Server v.1.0.1 based on Apache Geron=
imo
> http://sel.as-us.falkag.net/sel?cmd=3Dlnk&kid=3D120709&bid=3D263057&dat=
=3D121642
> _______________________________________________
> Modeling-users mailing list
> Mod...@li...
> https://lists.sourceforge.net/lists/listinfo/modeling-users
>=20
>=20