Add date_new_ssi Solr filed

The field contains copy of date_tesim. The change is required as *_tesim is not sortable field in Solr.

"msg":"can not sort on multivalued field: date_tesim of type: text_en"

This is part of change introduced with https://dti-uoy.atlassian.net/browse/TNW-30 bug fixes.

app/controllers/new_solr_fields_controller.rb

@@ -115,6 +115,10 @@ def modify_sdoc(sdoc)
 
       sdoc['date_facet_ssim'] = date_facet
 
+      # Store SingleDate in single Solr dynamic field e.g. *_ssi (Note *_dttsi requieres dates in ISO format) 
+      # Downcase occassional dates with comments 
+      sdoc['date_new_ssi'] = sdoc['date_tesim'][0].downcase unless sdoc['date_tesim'].blank?
+
       # add the register name and folio label to the entries
       register_new,folio_new = get_entry_register_array(sdoc['folio_ssim'])
       sdoc['entry_register_facet_ssim'] = register_new