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Re: vertical inheritance
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Re: vertical inheritance


  • Subject: Re: vertical inheritance
  • From: Lachlan Deck <email@hidden>
  • Date: Tue, 22 May 2007 11:28:28 +1000

I've turned on EOAdaptorDebugEnabled...

[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 message on screen says:
Could not save your changes:
Object value '2' for column 3 is not an instanceof String

Any ideas?

On 22/05/2007, at 10:46 AM, Lachlan Deck wrote:

On 22/05/2007, at 6:26 AM, Mike Schrag wrote:

Since you're currently the leading contender for the 2007 Vertical Inheritance Award, you mind setting up a test scenario of this and let me know if it works as expected?

Basic model: Company[1] <-->> Person (Abstract) [2], Employee [3] <<--> Country [4]

Running in a D2W app...
I created a Company and a Country and then when trying to create an Employee with relationship to both the company and country:


"Could not save your changes: Object value '1' for column 3 is not an instanceof String"

Adjusting the relationships to be not flattened:
java.lang.IllegalArgumentException: unable to add join {sourceAttribute = ; destinationAttribute = ; } to relationship _eofInv_Employee_company in entity Company because either the source attribute or destination attribute is a flattened attribute.


Hmm, Creating with EOModeler:
"Could not save your changes: Object value '2' for column 3 is not an instanceof String."


Attempting to not flatten the relationship, gives the above exception (about either a source/destination attribute being flattened).

I've attempted
- to not include the foreign key at all in the child (this fails when attempting to set the relationship because the companyId is missing)
- to point the child relations source attribute to parent.foreignKey (this fails when attempting to login with an EORelation join error)
- to flatten both the parent foreign key and relationship into child (this fails as for some reason it's attempting to set a String value)
- to not include in the plist the relation or foreign key from parent (fails
- to not include the relationship in the child (leaving the flattened fk) this doesn't provide an option to set the relation in D2W :-/


None work.

Does *anyone* know what does? I'm happy to supply the project/model files. If anyone is able to figure this out it would be greatly appreciated!

Note the relationship in the parent is a mandatory toOne to Company.

ps. Alan you mentioned that you guys 'do this' - can you offer any help here?

Thanks...

with regards, --

Lachlan Deck



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  • Follow-Ups:
    • Re: vertical inheritance
      • From: Lachlan Deck <email@hidden>
References: 
 >vertical inheritance (From: Mike Schrag <email@hidden>)
 >Re: vertical inheritance (From: Robert Walker <email@hidden>)
 >Re: vertical inheritance (From: Mike Schrag <email@hidden>)
 >Re: vertical inheritance (From: Lachlan Deck <email@hidden>)
 >Re: vertical inheritance (From: Mike Schrag <email@hidden>)
 >Re: vertical inheritance (From: Lachlan Deck <email@hidden>)
 >Re: vertical inheritance (From: Mike Schrag <email@hidden>)
 >Re: vertical inheritance (From: Lachlan Deck <email@hidden>)
 >Re: vertical inheritance (From: Mike Schrag <email@hidden>)
 >Re: vertical inheritance (From: Lachlan Deck <email@hidden>)

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