[JIRA] Created: (CAY-835) setting meaningful pk to zero turn on autogenerated keys

[Tore Halset (JIRA)]

setting meaningful pk to zero turn on autogenerated keys
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                 Key: CAY-835
                 URL: https://issues.apache.org/cayenne/browse/CAY-835
             Project: Cayenne
          Issue Type: Bug
          Components: Cayenne Core Library
    Affects Versions: 3.0
         Environment: 3.0M1, derby, mac, java 5
            Reporter: Tore Halset
            Assignee: Tore Halset
             Fix For: 3.0


Having a table with a int primary key mapped to a Integer. Setting this value 
to Integer.valueOf(0) makes cayenne create its own primary key. So instead of 
value zero, the primary key will be 200 or whatever.

Here is a test that shows this behaviour:
    public void testInsertWithMeaningfulPKValueZero() throws Exception {
        Integer zero = new Integer(0);
        MeaningfulPKTest1 obj = (MeaningfulPKTest1) context
                .newObject("MeaningfulPKTest1");
        obj.setPkAttribute(zero);
        obj.setDescr("aaa-aaa-bbb");
        context.commitChanges();
        assertEquals(zero, obj.getPkAttribute());
        ObjectIdQuery q = new ObjectIdQuery(new ObjectId(
                "MeaningfulPKTest1",
                MeaningfulPKTest1.PK_ATTRIBUTE_PK_COLUMN,
                zero.intValue()), true, ObjectIdQuery.CACHE_REFRESH);
        assertEquals(1, context.performQuery(q).size());
    }


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