Search person variant name

Support search via person variant name as raised at
[#63](#63)

app/controllers/people_controller.rb

@@ -19,14 +19,23 @@ def index
     @search_array = []
 
     # Get Concepts for the Person ConceptScheme and filter according to search_term
-    num = SolrQuery.new.solr_query(q = 'has_model_ssim:Person', fl = 'id', rows = 0)['response']['numFound']
-    SolrQuery.new.solr_query(q = 'has_model_ssim:Person', fl = 'id, preflabel_tesim', rows = num, sort = 'preflabel_si asc')['response']['docs'].map.each do |result|
+    num = SolrQuery.new.solr_query(q = 'has_model_ssim:Person',
+                                   fl = 'id',
+                                   rows = 0)['response']['numFound']
+    search_response = SolrQuery.new.solr_query(q = 'has_model_ssim:Person',
+                                               fl = 'id, preflabel_tesim, altlabel_tesim',
+                                               rows = num,
+                                               sort = 'preflabel_si asc')
+    search_response['response']['docs'].map.each do |result|
       id = result['id']
       preflabel = result['preflabel_tesim'].join
-
+      # Some persons do not have variant name
+      altlabel = ''
+      altlabel = result['altlabel_tesim'].join unless result['altlabel_tesim'].nil?
       tt = []
 
-      next unless preflabel.match(/#{@search_term}/i)
+      # Select results that match person name or person variant name
+      next unless preflabel.match(/#{@search_term}/i) || altlabel.match(/#{@search_term}/i)
 
       tt << id
       tt << preflabel