In results of search models, enumerated values that are not contents or string are not supported.

Steps to reproduce

1. Add a content attribute with long type and an enumerator like:

      <cms:metadata name="longAttribute" type="long">
          <cms:label i18n="false">My long attribute</cms:label>
          <cms:description i18n="false">My long attribute</cms:description>
          <enumeration>
               <entry>
                   <label>Valeur 1</label>
                   <value>1</value>
               </entry>
               <entry>
                   <label>Valeur 2</label>
                   <value>2</value>
               </entry>
          </enumeration>
      </cms:metadata>

2. Fill a content with this attribute
3. Launch a Solr search (a classic search has the same behaviour) on this content and display your long attribute like:
   • Content type: MyContentType
   • Query: longAttribute:*
   • Columns: title, longAttribute
     # In the results, the long attribute is displayed as [Object object]