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Re: EOAndQualifier on child entity property
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Re: EOAndQualifier on child entity property


  • Subject: Re: EOAndQualifier on child entity property
  • From: Yann Bizeul <email@hidden>
  • Date: Fri, 18 Aug 2006 21:29:15 +0200

A safer bet is to use some extensions to WO. See Pierre Bernards excellent qualifier extensions at

http://www.bernard-web.com/pierre/webobjects/code.html

I tried that with the following code :

    public Main doFind()
    {
        Main nextPage = (Main)pageWithName("Main");

NSArray tags = NSArray.componentsSeparatedByString(tag," ");

NSMutableArray tagsQualifiers = new NSMutableArray();
int i;
for (i=0;i<tags.count();i++)
{
EOQualifier q = EOQualifier.qualifierWithQualifierFormat("tag = % @",new NSArray(tags.objectAtIndex(i)));
tagsQualifiers.addObject(new ExistsInRelationshipQualifier("tags",q));
}
EOAndQualifier tagsQualifier = new EOAndQualifier(tagsQualifiers);

EOFetchSpecification f = new EOFetchSpecification ("Location",tagsQualifier,null);
nextPage.searchResults = session().defaultEditingContext ().objectsWithFetchSpecification(f);
return nextPage;
}



All I get is the following exception :
[2006-08-18 21:25:15 CEST] <WorkerThread0> java.lang.NullPointerException
at com.webobjects.eoaccess.EOSQLExpression._aliasForRelationshipPath (EOSQLExpression.java:324)
at com.webobjects.eoaccess.EOSQLExpression._aliasForRelatedAttributeRelatio nshipPath(EOSQLExpression.java:259)
at com.houdah.webobjects.eoaccess.qualifiers.ExistsInRelationshipQualifierS upport.sqlStringForSQLExpression (ExistsInRelationshipQualifierSupport.java:100)
at com.webobjects.eoaccess.EOQualifierSQLGeneration $Support._sqlStringForSQLExpression(EOQualifierSQLGeneration.java:151)
at com.webobjects.eoaccess.EOSQLExpression.sqlStringForArrayOfQualifiers (EOSQLExpression.java:1562)
at com.webobjects.eoaccess.EOSQLExpression.sqlStringForConjoinedQualifiers( EOSQLExpression.java:1597)
at com.webobjects.eoaccess.EOQualifierSQLGeneration $_AndQualifierSupport.sqlStringForSQLExpression (EOQualifierSQLGeneration.java:512)
at com.webobjects.eoaccess.EOQualifierSQLGeneration $Support._sqlStringForSQLExpression(EOQualifierSQLGeneration.java:151)
at com.webobjects.eoaccess.EOSQLExpression.sqlStringForArrayOfQualifiers (EOSQLExpression.java:1562)
at com.webobjects.eoaccess.EOSQLExpression.sqlStringForConjoinedQualifiers( EOSQLExpression.java:1597)
at com.webobjects.eoaccess.EOQualifierSQLGeneration $_AndQualifierSupport.sqlStringForSQLExpression (EOQualifierSQLGeneration.java:512)
at com.webobjects.eoaccess.EOQualifierSQLGeneration $Support._sqlStringForSQLExpression(EOQualifierSQLGeneration.java:151)
at com.webobjects.eoaccess.EOSQLExpression.prepareSelectExpressionWithAttri butes(EOSQLExpression.java:1024)
at com.webobjects.jdbcadaptor.JDBCExpression.prepareSelectExpressionWithAtt ributes(JDBCExpression.java:273)
at com.webobjects.eoaccess.EOSQLExpressionFactory.selectStatementForAttribu tes(EOSQLExpressionFactory.java:226)
at com.webobjects.jdbcadaptor.JDBCChannel.selectAttributes (JDBCChannel.java:178)
at com.webobjects.eoaccess.EODatabaseChannel._selectWithFetchSpecificationE ditingContext(EODatabaseChannel.java:878)
at com.webobjects.eoaccess.EODatabaseChannel.selectObjectsWithFetchSpecific ation(EODatabaseChannel.java:215)
at com.webobjects.eoaccess.EODatabaseContext._objectsWithFetchSpecification EditingContext(EODatabaseContext.java:3205)
at com.webobjects.eoaccess.EODatabaseContext.objectsWithFetchSpecification( EODatabaseContext.java:3346)
at com.webobjects.eocontrol.EOObjectStoreCoordinator.objectsWithFetchSpecif ication(EOObjectStoreCoordinator.java:539)
at com.webobjects.eocontrol.EOEditingContext.objectsWithFetchSpecification( EOEditingContext.java:4114)
at com.webobjects.eocontrol.EOEditingContext.objectsWithFetchSpecification( EOEditingContext.java:4500)
at FindRightComponent.doFind(FindRightComponent.java:36)


Yann Bizeul • yann at tynsoe.org
Cocoa Developer

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  • Follow-Ups:
    • Re: EOAndQualifier on child entity property
      • From: Chuck Hill <email@hidden>
    • Re: EOAndQualifier on child entity property
      • From: Art Isbell <email@hidden>
References: 
 >EOAndQualifier on child entity property (From: Yann Bizeul <email@hidden>)
 >Re: EOAndQualifier on child entity property (From: Sacha Michel Mallais <email@hidden>)
 >Re: EOAndQualifier on child entity property (From: Chuck Hill <email@hidden>)

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