Hello there,
occassionally, an object gets deleted which should not be. Now, just before
"ec.saveChanges()" I am logging out
===
lognow "saving INS:$ec.insertedObjects.count
UPD:$ec.updatedObjects.count DEL:$ec.deletedObjects.count"
===
and in my "databaseContextWillPerformAdaptorOperations" delegate method I am
logging out all the operations, and the results I sort of can't decode:
===
14:38:16.299|WorkerThread14 --- saving INS:2 UPD:4 DEL:0
... about to perform 4 DB operations
- 1: INSERT on 'DBPriceOffer' 8{validOffer:false,
sheetConfirmed:<com.webobjects.foundation.NSKeyValueCoding$Null>, uid:1022548,
auction_id:1000233, amount:<com.webobjects.foundation.NSKeyValueCoding$Null>,
price:1142, creationDate:2015-02-19 13:38:15 Etc/GMT, creator_id:1000058}
- 2: INSERT on 'DBAudit' 8{creator_id:1000058, uid:1031224,
creationDate:2015-02-19 13:38:15 Etc/GMT, kind:8, auction_id:1000233,
title:cenov? návrh 1142 CZK/MWh, aktuální auk?ní cena 11…, market_id:1000001,
ipAddress:212.27.219.66}
- 3: UPDATE on 'DBAuction' ((uid = 1000233) and (commodityTimechunksString =
'LVO-1022542: 1140/null (true/0) 2015-02-19 13:38:10 Etc/GMT BY EONenergie
(1000048) USR EONenergie (1000048) ===> prc 1139 CU RWEEnergie USR RWEEnergie
BR Hurtova (RB false)') and (commodityPriceSelectionType = 1022547))
1{commodityTimechunksString:LVO-1022547: 1139/null (true/0) 2015-02-19 13:38:1…}
- 4: DELETE on 'DBUserAuction' ((user_id = 1000058) and (auction_id = 1000233))
===
Those inserts make complete sense, no problem with them at all. They should
happen, and their contents is OK.
There were 4 updates in editing context, but there's only one update operation.
Now, do please correct me if I am wrong, but I understand the editing context
saves all changes (regardless the value might be same as before) and consider
them “updates”; when saving though, it compares them against the snapshot and
makes an operation only if the value differs. Thus, UPD:4 make sense too, and
the one update which changes only a string attribute
'commodityTimechunksString' of auction 1000233 makes complete sense. It should
happen, and the contents is OK.
The 4th operation is the problem. It should not happen.
From the fact just before save ec.deletedObjects.count==0 (DEL:0) I infer that
EOF decided to delete the object based on ownership or cascade deletion rules.
Given nothing other got deleted, it _must_ be ownership -- the object having
been removed from some owned relationship. There indeed are two of them.
Now, the trick is that I am pretty sure I am _not_ removing any of these object
from either of the relationships: at the very least, I can't recall I would
(the DBUserAuction objects are not intended to be ever deleted, unless the user
or auction to which they belong are deleted too), and nor I can find any usage
of removeObjectFromBothSides... nor other APIs with the relationships in
question.
Is there some trick to catch the code which actually causes the deletion?
I've tried to observe
EOEditingContext.ObjectsChangedInEditingContextNotification, but it seems it
does not get posted even if I add a removeObjectFromBothSides... manually to
test.
Will be grateful for any advice,
OC
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