It sounds to me like ProjectExecutionTemplate and
ProjectActorRoleTemplate both share a common EO superclass. __ALL__
objects in an EO inheritance hierarchy need a unique PK. Not just
unique in their table, unique across ALL tables in the hierarchy.
EOF should do this by default, if you have edited the data manually
or are importing it or some such, that is exactly what causes this
problem.
Chuck
On Apr 19, 2007, at 1:27 AM, Cheong Hee (Datasonic) wrote:
I have an application that is using this fetch defined in
"getAllObjects":
....
EOFetchSpecification fs = new EOFetchSpecification
("ProjectExecutionTemplate", nameQualifier, null, true, true,
sortOrdering);
NSArray foundList = context.objectsWithFetchSpecification(fs);
.....etc
Everything "seems" working, however when fetch this particular
table, this message has thrown out :: It was complaining the class
cast exception that instead of ProjectExecutionTemplate, WO looks
that the objects fetched are of ProjectActorRoleTemplate class!!
The SQL trace shows correctly that all 12 rows are fetched.
=== trace 1 === error
[2007-04-19 16:00:17 SGT] <WorkerThread0> evaluateExpression:
<com.webobjects.jdbcadaptor.MySQLPlugIn$MySQLExpression: "SELECT
DISTINCT t0.ABBREVIATION_NAME, t0.CODE, t0.IS_ACTIVE,
t0.IS_DEFAULT, t0.SEQUENCE_NUMBER, t0.TEMPLATE_KEY,
t0.VDESCRIPTION, t0.VNAME FROM PROJECT_EXECUTION_TEMPLATE t0 WHERE
UPPER(t0.VNAME) LIKE UPPER(?) ESCAPE '|'" withBindings: 1:"%"(vName)>
[2007-04-19 16:00:17 SGT] <WorkerThread0> 12 row(s) processed
[2007-04-19 16:00:17 SGT] <WorkerThread0> === Commit Internal
Transaction
java.lang.ClassCastException: com.rhino.model.ProjectActorRoleTemplate
at com.rhino.model.ProjectExecutionTemplate.getAllObjects
(ProjectExecutionTemplate.java:206)
at ProjectExecutionPage.initializeDisplayGroup
(ProjectExecutionPage.java:110)
So, spent some time on error searching... and finally reach a point
that if I changed the primary key in ProjectExecutionTemplate
database, e.g.:
(NULL,NULL,1,NULL,NULL,1000007,NULL,'Design/Development'), ==>
changed to
(NULL,NULL,1,NULL,NULL,10007,NULL,'Design/Development'), ==> Note
that "1000007" to "10007"
When run the app again, everything worked! See below:
==== trace 2 ==== good one
[2007-04-19 16:03:45 SGT] <WorkerThread1> evaluateExpression:
<com.webobjects.jdbcadaptor.MySQLPlugIn$MySQLExpression: "SELECT
DISTINCT t0.ABBREVIATION_NAME, t0.CODE, t0.IS_ACTIVE,
t0.IS_DEFAULT, t0.SEQUENCE_NUMBER, t0.TEMPLATE_KEY,
t0.VDESCRIPTION, t0.VNAME FROM PROJECT_EXECUTION_TEMPLATE t0 WHERE
UPPER(t0.VNAME) LIKE UPPER(?) ESCAPE '|'" withBindings: 1:"%"(vName)>
[2007-04-19 16:03:45 SGT] <WorkerThread1> 12 row(s) processed
[2007-04-19 16:03:45 SGT] <WorkerThread1> === Commit Internal
Transaction
So what my question is: what has gone wrong actually?
Primary key overflow?
Faults in MYSQL or WO or "programmer"? (primary key is defined as
int(11) in MYSQL)
How could Class Cast Exception happen in the first place? (though
both subclass from Template..)
Puzzled....Appreciate comments. [WO5.2.4/MYSQL v 5.0.22]
Cheers
Cheong Hee
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