Re: Declaring and using a nested EditingContext

Hi again,

Thanks a lot! I am sorry for this late feedback, but I have been on =

holiday :-)  I will look into it as soon as I get the time and get back =

to you at the earliest convenience.

Best,
Paul


S=E9bastien Bigaret wrote:
>     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 exper=
ience :)  =

> =

> Thanks again for the report, and hopefully the patch will be tested enoug=
h 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_n=
ame,
>>          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 chang=
es =

>>>> 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 chi=
ld context. If they are not, it is definitely a bug.
>>>
>>> Could you please send me your example, where the bug appear?  This is s=
omething 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 =
in =

>>>> 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 chang=
es =

>>>> 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, securi=
ty?
>>>> 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 Gero=
nimo
>>>> http://sel.as-us.falkag.net/sel?cmd=3Dlnk&kid=3D120709&bid=3D263057&da=
t=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 e=
asier
>> Download IBM WebSphere Application Server v.1.0.1 based on Apache Geroni=
mo
>> 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
>>
>>
> =


-------------------------------------------------------------------------
Take Surveys. Earn Cash. Influence the Future of IT
Join SourceForge.net's Techsay panel and you'll get the chance to share your
opinions on IT & business topics through brief surveys -- and earn cash
http://www.techsay.com/default.php?page=3Djoin.php&p=3Dsourceforge&CID=3DDE=
VDEV