Couchbase light ios - Writing to the database in validation block

rivka_s · May 28, 2014, 10:23am

Hi ,
I’m trying to create an new document that relay on other documents in the data base ,
I thought that it will be perfect if i’ll do it on the validation block ( [dataBase setValidationNamed: @“Name” asBlock: VALIDATIONBLOCK … ) but i’m getting crash , the stack looks :

0 ??? 1 CouchbaseLightTest 2 Foundation 3 CouchbaseLightTest 4 CouchbaseLightTest 5 CouchbaseLightTest 6 CouchbaseLightTest 7 CouchbaseLightTest 8 CouchbaseLightTest 9 CouchbaseLightTest 10 CouchbaseLightTest 11 CouchbaseLightTest 12 CouchbaseLightTest 13 CouchbaseLightTest 14 CouchbaseLightTest 15 CouchbaseLightTest 16 CouchbaseLightTest 17 CouchbaseLightTest 18 CouchbaseLightTest 19 CouchbaseLightTest 20 Foundation 21 CoreFoundation 22 CoreFoundation 23 CoreFoundation 24 CoreFoundation 25 CoreFoundation 26 Foundation 27 CouchbaseLightTest 28 Foundation 29 libsystem_c.dylib 30 libsystem_c.dylib 0x03cd5678 0x0 + 63788664,
0x0006dbb1 main + 0,
0x347aaab7 + 90,
0x000bd339 -[CBL_FMDatabase beginUse] + 180,
0x000bcd11 -[CBL_FMDatabase executeUpdate:error:withArgumentsInArray:orVAList:] + 196,
0x000bd215 -[CBL_FMDatabase executeUpdate:] + 40,
0x00070b1f -[CBLDatabase(Internal) beginTransaction] + 114,
0x00070e77 -[CBLDatabase(Internal) _inTransaction:] + 206,
0x00090d55 -[CBLDatabase(Insertion) putRevision:prevRevisionID:allowConflict:status:] + 460,
0x0009dff1 -[CBLDocument putProperties:prevRevID:allowConflict:error:] + 484,
0x0009e0c7 -[CBLDocument putProperties:error:] + 82,
0x0006e7fd __50-[RSViewController assosiateValidationToDataBase:]_block_invoke + 548,
0x00093259 -[CBLDatabase(Insertion) validateRevision:previousRevision:parentRevID:] + 540,
0x00091d51 __61-[CBLDatabase(Insertion) forceInsert:revisionHistory:source:]_block_invoke + 456,
0x00070e8b -[CBLDatabase(Internal) _inTransaction:] + 226,
0x00091a5b -[CBLDatabase(Insertion) forceInsert:revisionHistory:source:] + 582,
0x00084379 __30-[CBL_Puller insertDownloads:]_block_invoke + 684,
0x00070e8b -[CBLDatabase(Internal) _inTransaction:] + 226,
0x00083f45 -[CBL_Puller insertDownloads:] + 212,
0x0008c497 -[CBLBatcher processNow] + 198,
0x347e3277 + 450,
0x33eaa5df + 14,
0x33eaa291 + 272,
0x33ea8f01 + 1232,
0x33e1bebd CFRunLoopRunSpecific + 356,
0x33e1bd49 CFRunLoopRunInMode + 104,
0x3473ef97 + 254,
0x0007bb07 -[CBL_Server runServerThread] + 310,
0x347ebe85 + 972,
0x3c054311 + 308,
0x3c0541d8 thread_start + 8

It’s look like the data base is locked and that’s why i’m getting this problem , but , the validation is on one data base and the insertion is to another database, ( so why are all the databases are locked? ).

Thanks in advance ,

rivka_s · May 28, 2014, 10:31am

I notice this warning :

“This means you can’t solve latency problems just by calling part of your app code that uses Couchbase Lite on a background thread or dispatch queue. If you’re using the same Couchbase Lite instances that you use on the main thread, you will crash or corrupt the app state.
Couchbase Lite objects are not thread-safe. You cannot call them from multiple threads.”

seems that since i’m using the data base on the main thread , i can’t calling it from another - probably the validation block is called on background thread …