Re: Declaring and using a nested EditingContext

    Hi Paul & all,

Thanks for the detailed report.

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

Just after 0.9 I posted a first patch partially correcting the problem, see=
 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 you =
find some time in the meantime to test it I'll be glad to read your experie=
nce :)  =


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

    Cheers,

-- S=E9bastien.


[email protected] a =E9crit :
> Please ignore the previous reply, it was only partly completed; I had a =

> little keyboard shortcut accident :-)
> =

> Hi S=E9bastien,
> =

> The test you mention run fine here, but still I get no changes in the =

> child in the following example, maybe I am doing something weird here. =

> Thanks a lot for looking into this :-)
> =

> Cheers,
> Paul
> =

> =

> EXAMPLE
> =3D=3D=3D=3D=3D=3D=3D
> =

> pymodel_parentchild.py
> -------------------------------------------------------------------------=
---
> from Modeling.PyModel import *
> =

> Association.defaults['delete'] =3D ['nullify', 'nullify']
> Entity.defaults['properties'] =3D []
> =

> model =3D Model('parentchild', version=3D'0.1')
> model.associations =3D []
> model.entities =3D [
> =

>          Entity('Person',
>                  properties =3D [
>                          APrimaryKey('uid',
> 				isClassProperty=3D0,
> 				isRequired=3D1, doc=3D'PK'),
>                          AString('first_name', width=3D60),
>                          AString('last_name', width=3D60),
>                  ],
>          ),
> =

> ]
> -------------------------------------------------------------------------=
---
> =

> =

> Person.py
> -------------------------------------------------------------------------=
---
> from Modeling import dynamic
> __metaclass__ =3D dynamic.CustomObjectMeta
> =

> class Person:
>          entityName =3D 'Person'
>          mdl_define_properties =3D 1
> -------------------------------------------------------------------------=
---
> =

> =

> =

> test_parentchild.py
> -------------------------------------------------------------------------=
---
> from parentchild.Person import Person
> from Modeling.EditingContext import EditingContext as EC
> =

> parent_ec =3D EC()
> child_ec =3D EC(parent_ec)
> =

> def populate(ec):
>          ec.insert(Person(first_name=3D'Anna', last_name=3D'Anderson'))
> =

> def result():
>          global parent_ec, child_ec
> =

>          print "PARENT:",
>          for p in parent_ec.fetch('Person'): print p.first_name, =

> p.last_name,
>          print
>          print "CHILD :",
>          for p in child_ec.fetch('Person'): print p.first_name, p.last_na=
me,
>          print
>          print
> =

> print "POPULATING AND SAVING CHANGES"
> populate(parent_ec)
> #parent_ec.processRecentChanges()
> parent_ec.saveChanges()
> =

> result()
> =

> 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()
> =

> result()
> -------------------------------------------------------------------------=
---
> =

> =

> OUTPUT FROM TEST
> ------------------------------------------------------------
> POPULATING AND SAVING CHANGES
> PARENT: Anna Anderson
> CHILD : Anna Anderson
> =

> CHANGING 'Anna' --> 'anna' in parent AND SAVING CHANGES
> PARENT: anna Anderson
> CHILD : Anna Anderson
> ------------------------------------------------------------
> =

> =

> =

> =

> S=E9bastien Bigaret wrote:
>>    Hi Paul & all,
>>
>> [email protected] 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 change=
s =

>>> 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 then =

>>> do a fetch on that object in the child, the change is not shown in the =

>>> object held by the child EC.
>> Your understanding is correct, and the changes should appear in the chil=
d context. If they are not, it is definitely a bug.
>>
>> Could you please send me your example, where the bug appear?  This is so=
mething 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()
>>
>> [email protected] a =E9crit :
>>> Hi all,
>>>
>>> I am reading chapter "5.2 Declaring and using a nested EditingContext" =

>>> 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=
) =

>>> that:
>>>
>>> 1. Inserting an object in the parent EC will show up in a fetch in the =

>>> child EC.
>>>
>>> 2. Deleting an object in the parent EC deletes it from the result set i=
n =

>>> 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 change=
s =

>>> 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 then =

>>> do a fetch on that object in the child, the change is not shown in the =

>>> 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 =

>>> framework :-)
>>>
>>> Cheers
>>> Paul
>>>
>>> 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
>>> [email protected]
>>> https://lists.sourceforge.net/lists/listinfo/modeling-users
>>>
>>>
> =

> =

> -------------------------------------------------------------------------
> Using Tomcat but need to do more? Need to support web services, security?
> Get stuff done quickly with pre-integrated technology to make your job ea=
sier
> Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo
> http://sel.as-us.falkag.net/sel?cmd=3Dlnk&kid=3D120709&bid=3D263057&dat=
=3D121642
> _______________________________________________
> Modeling-users mailing list
> [email protected]
> https://lists.sourceforge.net/lists/listinfo/modeling-users
> =

> =




-------------------------------------------------------------------------
Using Tomcat but need to do more? Need to support web services, security?
Get stuff done quickly with pre-integrated technology to make your job easi=
er
Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo
http://sel.as-us.falkag.net/sel?cmd=3Dlnk&kid=3D120709&bid=3D263057&dat=3D1=
21642