Hi there,
On 15/06/2008, at 6:00 PM, Robert B.Hanviriyapunt wrote:
Ok. I completely verified that it is a problem (at least for me,
who likes to implement inheritance in my entities, big time!)
If you're talking about Vertical Inheritance (i.e., where the parent
entity is mapped to a different table) and you have, for example, a
toOne mandatory relationship from the parent entity to some other
entity, then the foreign key (which is not a class property in the
parent entity) must be exposed as a class property in the sub-entity
(and allow null in the sub-entity) for the INSERT to work.
-----------------------------
Radar:5219252
EOF fails to generate foreign key in sql (vertical inheritance)
-----------------------------
21-May-2007 08:05 PM Lachlan Deck:
Summary:
EOF is failing to generate the sql binding for foreign keys (i.e., non-
class attributes) defined in the parent and flattened to sub-entities
(Vertical inheritance) unless you expose the flattened foreign key for
the relationship in the sub-entity.
Steps to Reproduce:
1) grab attached model
2) create a new D2W app with the model
3) open the model and generate sql
4) run the app
5) create a company
6) now create an Employee related to above company
7) Message on screen: "Could not save your changes: Object value '2'
for column 3 is not an instanceof String"
8) quit
9) Open model again and set flattened foreign key (companyId in
Employee) as class attribute.
10) run again. This time it works.
Expected Results:
I expect EOF to generate the foreign keys as it does for any other
relationship.
Actual Results:
It's not even producing the foreign key in the sql and is thus
attempting to assign a value intended for another column to it - with
a JDBC exception being thrown because it naturally was expecting to
receive data of a different type.
Regression:
I have tested this extensively over the last 4-5 days on both WO 5.2.4
and WO 5.3.x with the same results. I've tested (as you could see from
the mailing list archives under the subject: vertical inheritance)
various munging of the model's plist files to no avail. The only work-
a-round is expose the flattened foreign key in the sub-entity.
Notes:
The generated sql without exposing the foreign key:
[2007-05-22 11:26:02 EST] <WorkerThread12> === Begin Internal
Transaction
[2007-05-22 11:26:02 EST] <WorkerThread12> finding primary key value
for Person
[2007-05-22 11:26:02 EST] <WorkerThread12> evaluateExpression:
<com.webobjects.jdbcadaptor.MySQLPlugIn$MySQLExpression: "SELECT PK
FROM EO_PK_TABLE WHERE NAME = 'Person' FOR UPDATE">
[2007-05-22 11:26:02 EST] <WorkerThread12> fetch canceled
[2007-05-22 11:26:02 EST] <WorkerThread12> 1 row(s) processed
[2007-05-22 11:26:02 EST] <WorkerThread12> updating primary key value
for Person
[2007-05-22 11:26:02 EST] <WorkerThread12> evaluateExpression:
<com.webobjects.jdbcadaptor.MySQLPlugIn$MySQLExpression: "UPDATE
EO_PK_TABLE SET PK = 14 WHERE NAME = 'Person' AND PK = 13">
[2007-05-22 11:26:02 EST] <WorkerThread12> === Commit Internal
Transaction
[2007-05-22 11:26:02 EST] <WorkerThread12> === Begin Internal
Transaction
[2007-05-22 11:26:02 EST] <WorkerThread12> evaluateExpression:
<com.webobjects.jdbcadaptor.MySQLPlugIn$MySQLExpression: "INSERT INTO
Person(id, lastName, code, created, modified, firstName, entityType)
VALUES (?, ?, ?, ?, ?, ?, ?)" withBindings: 1:14(NeededByEOF0),
2:"SaveMe"(lastName), 3:2(code), 4:2007-05-22 00:00:00(created),
5:2007-05-22 00:00:00(modified), 6:"Please"(firstName),
7:"Employee"(entityType)>
[2007-05-22 11:26:02 EST] <WorkerThread12> === Rollback Internal
Transaction
The generated sql when the foreign key is exposed:
[2007-05-22 13:17:20 EST] <WorkerThread4> === Begin Internal
Transaction
[2007-05-22 13:17:20 EST] <WorkerThread4> finding primary key value
for Person
[2007-05-22 13:17:20 EST] <WorkerThread4> evaluateExpression:
<com.webobjects.jdbcadaptor.MySQLPlugIn$MySQLExpression: "SELECT PK
FROM EO_PK_TABLE WHERE NAME = 'Person' FOR UPDATE">
[2007-05-22 13:17:20 EST] <WorkerThread4> fetch canceled
[2007-05-22 13:17:20 EST] <WorkerThread4> 1 row(s) processed
[2007-05-22 13:17:20 EST] <WorkerThread4> updating primary key value
for Person
[2007-05-22 13:17:20 EST] <WorkerThread4> evaluateExpression:
<com.webobjects.jdbcadaptor.MySQLPlugIn$MySQLExpression: "UPDATE
EO_PK_TABLE SET PK = 27 WHERE NAME = 'Person' AND PK = 26">
[2007-05-22 13:17:20 EST] <WorkerThread4> === Commit Internal
Transaction
[2007-05-22 13:17:20 EST] <WorkerThread4> === Begin Internal
Transaction
[2007-05-22 13:17:20 EST] <WorkerThread4> evaluateExpression:
<com.webobjects.jdbcadaptor.MySQLPlugIn$MySQLExpression: "INSERT INTO
Person(id, lastName, code, firstName, companyId, modified, created,
entityType) VALUES (?, ?, ?, ?, ?, ?, ?, ?)" withBindings:
1:27(NeededByEOF0), 2:"Bob"(lastName), 3:"777777"(code),
4:"Bill"(firstName), 5:2(companyId), 6:2007-05-22 00:00:00(modified),
7:2007-05-22 00:00:00(created), 8:"Employee"(entityType)>
[2007-05-22 13:17:20 EST] <WorkerThread4> evaluateExpression:
<com.webobjects.jdbcadaptor.MySQLPlugIn$MySQLExpression: "INSERT INTO
Employee(id) VALUES (?)" withBindings: 1:27(id)>
[2007-05-22 13:17:20 EST] <WorkerThread4> === Commit Internal
Transaction
Please fix/release an update for this soon.
'Inherit3.eomodeld.zip' was successfully uploaded
22-May-2007 07:40 PM Lachlan Deck:
Further to the above, where the work-a-round currently requires
exposing the flattened foreign key(s) as class attributes, I've found
that the sub-entity must allow-null, regardless of the parent's
setting for these attributes, in order for validation (esp in a D2W
app) to succeed.
05-Jun-2007 01:50 PM Lachlan Deck:
A further complication comes into play as follows: if you have a
parent entity Taggable and one of the sub-entities BinaryInfo that has
a Many-to-Many relationship to Taggable via a Join - NeededByEOF0 is
not satisfied.
-----------------------------
with regards,
--
Lachlan Deck
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