I'm not sure if this has already been covered as
there doesn't seem to be a search facility for the
mailing list.
My problem is that I have a simple hierarchy with
locations. A location can have child locations and
vice verca can have a parent:
Schema:
--------------
id
parent_id
description
Now I have modeled this relationship and the modeler
generated the following:
<db-entity name="IMV_locations" schema="dbo" catalog="GPSForecast">
<db-attribute name="description" type="VARCHAR" length="75"/>
<db-attribute name="id" type="INTEGER" isPrimaryKey="true"
isMandatory="true" length="10"/>
<db-attribute name="parent_id" type="INTEGER" length="10"/>
</db-entity>
<db-relationship name="rel_children" source="IMV_locations"
target="IMV_locations" toMany="true">
<db-attribute-pair source="id" target="parent_id"/>
</db-relationship>
<db-relationship name="rel_parent" source="IMV_locations"
target="IMV_locations" toMany="false">
<db-attribute-pair source="parent_id" target="id"/>
</db-relationship>
<obj-relationship name="children" source="Location" target="Location"
deleteRule="Cascade"
db-relationship-path="rel_children.rel_children"/>
<obj-relationship name="parent" source="Location" target="Location"
db-relationship-path="rel_parent.rel_parent"/>
Now when I run some test code to build a tree in tapestry, the
following statement gets genereated when I try to fetch children:
SELECT t0.description, t0.id, t0.parent_id
FROM dbo.IMV_locations t0, dbo.IMV_locations t1
WHERE t0.parent_id = t1.id AND (t1.parent_id = ?) [bind: 1]
This however incorrect, it should read:
SELECT t0.description, t0.id, t0.parent_id
FROM dbo.IMV_locations t0, dbo.IMV_locations t1
WHERE t0.parent_id = t1.id AND (t1.id = ?) [bind: 1]
Has anyone else had this problem?
Filip
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