How to enforce Delete before Insert?
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Key: CAY-536
URL: http://issues.apache.org/cayenne/browse/CAY-536
Project: Cayenne
Type: Bug
Components: Cayenne Core Library
Versions: 1.2 [BETA]
Environment: XPP, MSSQL 2005 Express (MSSQL 2000 should be fine I guess),
Tomcat 5.0.28, Spring 1.2.7
Reporter: Bill Fan
We have Product & ProductRelation tables. When we need to add a new
ProductRelation record to a product, we like to delete all the existing
ProductRelation records first, then add the new one.
We are having the "Cannot insert duplicate key..." error. It appears that the
DELETE statement is executed after the INSERT statement.
Here is the stripped down datamap:
<db-entity name="Product" schema="dbo" catalog="iCon">
<db-attribute name="ProductId" type="INTEGER"
isPrimaryKey="true" isMandatory="true" length="10"/>
<db-attribute name="ProductName" type="VARCHAR"
isMandatory="true" length="100"/>
</db-entity>
<db-entity name="ProductRelation" schema="dbo" catalog="iCon">
<db-attribute name="ProductId" type="INTEGER"
isPrimaryKey="true" isMandatory="true" length="10"/>
<db-attribute name="RelatedProductid" type="INTEGER"
isPrimaryKey="true" isMandatory="true" length="10"/>
<db-attribute name="TypeId" type="INTEGER" isPrimaryKey="true"
isMandatory="true" length="10"/>
</db-entity>
<db-entity name="Type" schema="dbo" catalog="iCon">
<db-attribute name="Description" type="VARCHAR"
isMandatory="true" length="50"/>
<db-attribute name="TypeId" type="INTEGER" isPrimaryKey="true"
isMandatory="true" length="10"/>
</db-entity>
<obj-entity name="Product" className="fanscom.model.Product"
lock-type="optimistic" dbEntityName="Product"
superClassName="org.objectstyle.cayenne.CayenneDataObject">
<obj-attribute name="productName" type="java.lang.String"
db-attribute-path="ProductName"/>
</obj-entity>
<obj-entity name="ProductRelation"
className="fanscom.model.ProductRelation" lock-type="optimistic"
dbEntityName="ProductRelation"
superClassName="org.objectstyle.cayenne.CayenneDataObject">
</obj-entity>
<obj-entity name="Type" className="fanscom.model.Type"
lock-type="optimistic" dbEntityName="Type"
superClassName="org.objectstyle.cayenne.CayenneDataObject">
<obj-attribute name="description" type="java.lang.String"
db-attribute-path="Description"/>
</obj-entity>
<db-relationship name="productRelationArray" source="Product"
target="ProductRelation" toDependentPK="true" toMany="true">
<db-attribute-pair source="ProductId" target="ProductId"/>
</db-relationship>
<db-relationship name="productRelationArray1" source="Product"
target="ProductRelation" toDependentPK="true" toMany="true">
<db-attribute-pair source="ProductId"
target="RelatedProductid"/>
</db-relationship>
<db-relationship name="toProduct" source="ProductRelation"
target="Product" toMany="false">
<db-attribute-pair source="ProductId" target="ProductId"/>
</db-relationship>
<db-relationship name="toProduct1" source="ProductRelation"
target="Product" toMany="false">
<db-attribute-pair source="RelatedProductid"
target="ProductId"/>
</db-relationship>
<db-relationship name="toType" source="ProductRelation" target="Type"
toMany="false">
<db-attribute-pair source="TypeId" target="TypeId"/>
</db-relationship>
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