Question Re: Relation one to many between hybris type and enum in CRM and CX Q&A

Relation one to many between hybris type and enum

Former Member — Wed, 28 Sep 2016 10:39:10 GMT

My goal is to allow products (hybris item) to have multiple values of litterType (enum) assigned.

In order to achieve that, in my *-items.xml file I have declared:

     <enumtype generate="true" code="LitterType" dynamic="true" autocreate="true">
         <value code="ANTI_BACTERIAL" />
         <value code="UNSCENTED" />
     </enumtype>

.................................

     <relation code="ProdToLitterTypeRel" localized="false" generate="true" autocreate="true">
         <description>Relation between product and litter type</description>
         <sourceElement type="Product" qualifier="product" cardinality="one">
             <description>Product</description>
             <modifiers read="true" write="true" search="true" optional="true"/>
         </sourceElement>
         <targetElement type="LitterType" qualifier="litterType" cardinality="many">
             <description>Litter type</description>
             <modifiers read="true" write="true" search="true" optional="true" partof="false"/>
         </targetElement>
     </relation>

............................................

             <itemtype code="Product" autocreate="false" generate="true">
                 <description>Base product</description>
                 <attributes>
                     <attribute type="localized:java.lang.String" qualifier="VMNo">
                         <modifiers read="true" write="true" />
                         <persistence type="property" />
                         <description>VMD Product Information.</description>
                     </attribute>
                     <attribute type="LitterType" qualifier="litterType">
                         <persistence type="property" />
                         <modifiers read="true" write="true" />
                         <description>Litter type</description>
                     </attribute>
                 </attributes>
             </itemtype>

Unfortunately the relation "ProdToLitterTypeRel" is throwing an exception when I try to build the project:

java.lang.ClassCastException: de.hybris.bootstrap.typesystem.YEnumType cannot be cast to de.hybris.bootstrap.typesystem.YCollectionType at de.hybris.bootstrap.codegenerator.jalo.RemoveFromRelation.getRelatedType(RemoveFromRelation.java:33) at de.hybris.bootstrap.codegenerator.jalo.AddToRelation.(AddToRelation.java:32) at de.hybris.bootstrap.codegenerator.jalo.ItemTypeWriter.createAddToRelation(ItemTypeWriter.java:157)

Is possible to create a one to many relation between hybris item and enum? In case it is not possible, what would be the best approach to achieve my goal?

Re: Relation one to many between hybris type and enum

Former Member — Wed, 28 Sep 2016 11:09:56 GMT

Hello. You should use many-to-many relation here.

         <relation code="ProdToLitterTypeRel" localized="false">
             <description>...</description>
             <deployment table="deployment_name" typecode="10050"/>
             <sourceElement type="Product" cardinality="many" navigable="false"/>
             <targetElement type="LitterType" qualifier="litterTypes" cardinality="many"/>
         </relation>

Also, there is no need to specify litterType in Product itemtype

Re: Relation one to many between hybris type and enum

Former Member — Wed, 28 Sep 2016 11:25:46 GMT

Hi, unfortunately changing the relation to many to many didn't fix the problem. I continue having the same exception

Re: Relation one to many between hybris type and enum

Former Member — Wed, 28 Sep 2016 13:07:44 GMT

I found a solution, instead of using a relation we need to use a collection type:

 <collectiontypes>        
 <collectiontype code="LitterTypeList" elementtype="LitterType" type="list" autocreate="true" generate="false"/>
     </collectiontypes>

and then use the collection in the product attribute:

 <attribute type="LitterTypeList" qualifier="litterTypeList">
                          <persistence type="property" />
                          <modifiers read="true" write="true" />
                          <description>Litter type</description>
                      </attribute>