[appengine-java] Re: Collection object not being updated
I still haven't figured this one out. Am I doing something wrong or
there's a small bug in the JDO GAE implementation?
Btw, I saw all the documentation has been changed to LowLevelAPI. Will
JDO loose support sometimes soon?
Thanks,
Cosmin
On Mar 6, 5:07 pm, Cosmin Stefan cosmin.stefandob...@gmail.com
wrote:
Hey,
I cannot use a transaction as I need to change multiple entries (as u
see, for each BigClass participant i have to remove an object from the
collection).
Regarding the pm.makePersistent() call, I have tried with it before
and it didn't do anything different. Plus that on the GAE
documentation page they say it's not needed, as the pm tracks all the
changes.
I have discovered another thing related to this problem. As I've shown
you, in the same persistence call I try to do these (remove smth from
the collection) changes and I also modify other objects. The weird
fact is that the last changes I make are persisted, while the others
aren't. Why is that?
Regarding JPA I'll look into it, but it's kind of difficult as I
already have a huge part of my code written with JDO.
Anyway, looking forward to hearing new suggestions!
Thanks,
Cosmin
On Mar 1, 6:59 pm, Ian Marshall ianmarshall...@gmail.com wrote:
Hi Cosmin,
I do not see any calls to
pm.makePersistent(...);
I use this to persist newly-created persistent instances.
I know that you do not use transactions, but I do. Within an active
transaction, one can update persistent instances and even persist or
delete entity group child instances without calling
pm.makePersistent(...);
Have you looked at the GAE persistence blog of Max Ross of Google?
There are some excellent working examples there...
Ian
On Feb 28, 6:55 pm, Cosmin Stefan cosmin.stefandob...@gmail.com
wrote:
So no ideea anyone?
On Feb 25, 11:42 pm, Cosmin Stefan cosmin.stefandob...@gmail.com
wrote:
Hey,
I have an issue while trying to update one object in a collection,
using JDO.
Here are the facts:
o i have a class (let's call it BigClass), that has an embedded
class(SmallClass) containing an ArrayList.
o I DONT use/need a transaction
o I query the database to get a List of BigClass items that should
be modified. I iterate through each of them and I...
o I remove an element from the list in the SmallClass embedded in
the current BigClass, the changes are not ALWAYS persisted
o if I print (log) the object after the change, it looks modified,
but if i check the DataViewer, the object was not updated
o i even tried using JDOHelper.makeDirty on the BigClass, with the
fieldName SmallClass, and it still doesn't work.
Some relevant code:
Query q =
pm.newQuery(BigClass.class,id==:ids);
ListBigClass
participatingUsers=(ListBigClass)
q.execute(participantIDs);
//Update the participants
ListIteratorBigClass
it=participatingUsers.listIterator();
BigClass participant;
boolean modified;
while(it.hasNext())
{
participant=it.next();
participant.list.remove(smth);
JDOHelper.makeDirty(participant,collection);
}
modify other objects
pm.close()
Another thing is that some of the changes I make after this part are
persisted...
So, if you have any suggestions, shoot pls!
Cosmin
--
You received this message because you are subscribed to the Google Groups
Google App Engine for Java group.
To post to this group, send email to google-appengine-java@googlegroups.com.
To unsubscribe from this group, send email to
google-appengine-java+unsubscr...@googlegroups.com.
For more options, visit this group at
http://groups.google.com/group/google-appengine-java?hl=en.
[appengine-java] Re: Collection object not being updated
Hey,
I cannot use a transaction as I need to change multiple entries (as u
see, for each BigClass participant i have to remove an object from the
collection).
Regarding the pm.makePersistent() call, I have tried with it before
and it didn't do anything different. Plus that on the GAE
documentation page they say it's not needed, as the pm tracks all the
changes.
I have discovered another thing related to this problem. As I've shown
you, in the same persistence call I try to do these (remove smth from
the collection) changes and I also modify other objects. The weird
fact is that the last changes I make are persisted, while the others
aren't. Why is that?
Regarding JPA I'll look into it, but it's kind of difficult as I
already have a huge part of my code written with JDO.
Anyway, looking forward to hearing new suggestions!
Thanks,
Cosmin
On Mar 1, 6:59 pm, Ian Marshall ianmarshall...@gmail.com wrote:
Hi Cosmin,
I do not see any calls to
pm.makePersistent(...);
I use this to persist newly-created persistent instances.
I know that you do not use transactions, but I do. Within an active
transaction, one can update persistent instances and even persist or
delete entity group child instances without calling
pm.makePersistent(...);
Have you looked at the GAE persistence blog of Max Ross of Google?
There are some excellent working examples there...
Ian
On Feb 28, 6:55 pm, Cosmin Stefan cosmin.stefandob...@gmail.com
wrote:
So no ideea anyone?
On Feb 25, 11:42 pm, Cosmin Stefan cosmin.stefandob...@gmail.com
wrote:
Hey,
I have an issue while trying to update one object in a collection,
using JDO.
Here are the facts:
o i have a class (let's call it BigClass), that has an embedded
class(SmallClass) containing an ArrayList.
o I DONT use/need a transaction
o I query the database to get a List of BigClass items that should
be modified. I iterate through each of them and I...
o I remove an element from the list in the SmallClass embedded in
the current BigClass, the changes are not ALWAYS persisted
o if I print (log) the object after the change, it looks modified,
but if i check the DataViewer, the object was not updated
o i even tried using JDOHelper.makeDirty on the BigClass, with the
fieldName SmallClass, and it still doesn't work.
Some relevant code:
Query q =
pm.newQuery(BigClass.class,id==:ids);
ListBigClass
participatingUsers=(ListBigClass)
q.execute(participantIDs);
//Update the participants
ListIteratorBigClass
it=participatingUsers.listIterator();
BigClass participant;
boolean modified;
while(it.hasNext())
{
participant=it.next();
participant.list.remove(smth);
JDOHelper.makeDirty(participant,collection);
}
modify other objects
pm.close()
Another thing is that some of the changes I make after this part are
persisted...
So, if you have any suggestions, shoot pls!
Cosmin
--
You received this message because you are subscribed to the Google Groups
Google App Engine for Java group.
To post to this group, send email to google-appengine-java@googlegroups.com.
To unsubscribe from this group, send email to
google-appengine-java+unsubscr...@googlegroups.com.
For more options, visit this group at
http://groups.google.com/group/google-appengine-java?hl=en.
[appengine-java] Re: Collection object not being updated
Hi Cosmin!
I have decided to use JPA due to the fact that with JDO I met several
bugs associated
with GAE and JPA I had fewer problems, beyond the restrictions that
there imposes GAE of the correct
use of the oriented object programming . Because of it I recommend to
you to use for GAE, JPA...
Regards
On Mar 1, 1:59 pm, Ian Marshall ianmarshall...@gmail.com wrote:
Hi Cosmin,
I do not see any calls to
pm.makePersistent(...);
I use this to persist newly-created persistent instances.
I know that you do not use transactions, but I do. Within an active
transaction, one can update persistent instances and even persist or
delete entity group child instances without calling
pm.makePersistent(...);
Have you looked at the GAE persistence blog of Max Ross of Google?
There are some excellent working examples there...
Ian
On Feb 28, 6:55 pm, Cosmin Stefan cosmin.stefandob...@gmail.com
wrote:
So no ideea anyone?
On Feb 25, 11:42 pm, Cosmin Stefan cosmin.stefandob...@gmail.com
wrote:
Hey,
I have an issue while trying to update one object in a collection,
using JDO.
Here are the facts:
o i have a class (let's call it BigClass), that has an embedded
class(SmallClass) containing an ArrayList.
o I DONT use/need a transaction
o I query the database to get a List of BigClass items that should
be modified. I iterate through each of them and I...
o I remove an element from the list in the SmallClass embedded in
the current BigClass, the changes are not ALWAYS persisted
o if I print (log) the object after the change, it looks modified,
but if i check the DataViewer, the object was not updated
o i even tried using JDOHelper.makeDirty on the BigClass, with the
fieldName SmallClass, and it still doesn't work.
Some relevant code:
Query q =
pm.newQuery(BigClass.class,id==:ids);
ListBigClass
participatingUsers=(ListBigClass)
q.execute(participantIDs);
//Update the participants
ListIteratorBigClass
it=participatingUsers.listIterator();
BigClass participant;
boolean modified;
while(it.hasNext())
{
participant=it.next();
participant.list.remove(smth);
JDOHelper.makeDirty(participant,collection);
}
modify other objects
pm.close()
Another thing is that some of the changes I make after this part are
persisted...
So, if you have any suggestions, shoot pls!
Cosmin
--
You received this message because you are subscribed to the Google Groups
Google App Engine for Java group.
To post to this group, send email to google-appengine-java@googlegroups.com.
To unsubscribe from this group, send email to
google-appengine-java+unsubscr...@googlegroups.com.
For more options, visit this group at
http://groups.google.com/group/google-appengine-java?hl=en.
[appengine-java] Re: Collection object not being updated
Hi Cosmin,
I do not see any calls to
pm.makePersistent(...);
I use this to persist newly-created persistent instances.
I know that you do not use transactions, but I do. Within an active
transaction, one can update persistent instances and even persist or
delete entity group child instances without calling
pm.makePersistent(...);
Have you looked at the GAE persistence blog of Max Ross or Google?
There are some excellent working examples there...
Ian
On Feb 28, 6:55 pm, Cosmin Stefan cosmin.stefandob...@gmail.com
wrote:
So no ideea anyone?
On Feb 25, 11:42 pm, Cosmin Stefan cosmin.stefandob...@gmail.com
wrote:
Hey,
I have an issue while trying to update one object in a collection,
using JDO.
Here are the facts:
o i have a class (let's call it BigClass), that has an embedded
class(SmallClass) containing an ArrayList.
o I DONT use/need a transaction
o I query the database to get a List of BigClass items that should
be modified. I iterate through each of them and I...
o I remove an element from the list in the SmallClass embedded in
the current BigClass, the changes are not ALWAYS persisted
o if I print (log) the object after the change, it looks modified,
but if i check the DataViewer, the object was not updated
o i even tried using JDOHelper.makeDirty on the BigClass, with the
fieldName SmallClass, and it still doesn't work.
Some relevant code:
Query q =
pm.newQuery(BigClass.class,id==:ids);
ListBigClass
participatingUsers=(ListBigClass)
q.execute(participantIDs);
//Update the participants
ListIteratorBigClass
it=participatingUsers.listIterator();
BigClass participant;
boolean modified;
while(it.hasNext())
{
participant=it.next();
participant.list.remove(smth);
JDOHelper.makeDirty(participant,collection);
}
modify other objects
pm.close()
Another thing is that some of the changes I make after this part are
persisted...
So, if you have any suggestions, shoot pls!
Cosmin
--
You received this message because you are subscribed to the Google Groups
Google App Engine for Java group.
To post to this group, send email to google-appengine-java@googlegroups.com.
To unsubscribe from this group, send email to
google-appengine-java+unsubscr...@googlegroups.com.
For more options, visit this group at
http://groups.google.com/group/google-appengine-java?hl=en.
[appengine-java] Re: Collection object not being updated
So no ideea anyone?
On Feb 25, 11:42 pm, Cosmin Stefan cosmin.stefandob...@gmail.com
wrote:
Hey,
I have an issue while trying to update one object in a collection,
using JDO.
Here are the facts:
o i have a class (let's call it BigClass), that has an embedded
class(SmallClass) containing an ArrayList.
o I DONT use/need a transaction
o I query the database to get a List of BigClass items that should
be modified. I iterate through each of them and I...
o I remove an element from the list in the SmallClass embedded in
the current BigClass, the changes are not ALWAYS persisted
o if I print (log) the object after the change, it looks modified,
but if i check the DataViewer, the object was not updated
o i even tried using JDOHelper.makeDirty on the BigClass, with the
fieldName SmallClass, and it still doesn't work.
Some relevant code:
Query q =
pm.newQuery(BigClass.class,id==:ids);
ListBigClass
participatingUsers=(ListBigClass)
q.execute(participantIDs);
//Update the participants
ListIteratorBigClass
it=participatingUsers.listIterator();
BigClass participant;
boolean modified;
while(it.hasNext())
{
participant=it.next();
participant.list.remove(smth);
JDOHelper.makeDirty(participant,collection);
}
modify other objects
pm.close()
Another thing is that some of the changes I make after this part are
persisted...
So, if you have any suggestions, shoot pls!
Cosmin
--
You received this message because you are subscribed to the Google Groups
Google App Engine for Java group.
To post to this group, send email to google-appengine-java@googlegroups.com.
To unsubscribe from this group, send email to
google-appengine-java+unsubscr...@googlegroups.com.
For more options, visit this group at
http://groups.google.com/group/google-appengine-java?hl=en.
