Divide: invalid parent - Equal

From: Gili (cowwo..bs.darktech.org)
Date: Mon Sep 12 2005 - 12:08:56 EDT

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    Hi,

            I've run this by Mike and neither of us understands why this doesn't
    work. Is there something non-obvious happening or is this a bug in the
    expression parser?

            I get this exception:

    org.objectstyle.cayenne.exp.ExpressionException: [v.1.2-dev September 9
    2005] Divide: invalid parent - Equal
              at
    org.objectstyle.cayenne.exp.parser.ConditionNode.jjtSetParent(ConditionNode.java:24)
              at
    org.objectstyle.cayenne.exp.parser.SimpleNode.setOperand(SimpleNode.java:191)
              at
    org.objectstyle.cayenne.exp.Expression.transform(Expression.java:601)
              at
    org.objectstyle.cayenne.exp.Expression.transform(Expression.java:593)
              at
    org.objectstyle.cayenne.exp.parser.AggregateConditionNode.transform(AggregateConditionNode.java:80)
              at
    org.objectstyle.cayenne.exp.Expression.expWithParameters(Expression.java:381)
              at
    org.objectstyle.cayenne.query.SelectQuery.queryWithParameters(SelectQuery.java:397)

            when I try using the following expression as a query qualifier.

    1) Build the expression manually...

         Expression a =
    Expression.fromString("cachedImage.imageSpecification.width /
    cachedImage.imageSpecification.height");
         Expression b = Expression.fromString("$width / $height");
         Expression c = ExpressionFactory.binaryExp(Expression.EQUAL_TO, a, b);

    2) Or, enter this qualifier in the modeler query creator...

    (cachedImage.imageSpecification.width /
    cachedImage.imageSpecification.height) = ($width / $height)

            in either case when you try using this expression in a query, the
    exception is thrown.

            This is also discussed here:
    http://www.desktopbeautifier.com/cayenne/posts/list/22.page

            Any ideas?

    Thanks,
    Gili 

    -- 
http://www.desktopbeautifier.com/

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