update item search to original name-matching behavior

We originally had a regression on name-matching, where, among
other issues, `straw hat` returned items containing both "straw"
and "hat", which isn't really helpful behavior since we're sorting
alphabetically. Now, `straw hat` behaves as expected.

Additionally, "phrases like these" behave as expected, too.

app/flex/flex_search.yml

@@ -5,8 +5,6 @@
 # ANCHORS litheral key: it will not be used as template
 # you can store here fragments of queries to reuse in the templates below
 ANCHORS:
-  - &name_locale_partial
-    "name.<<locale>>^<<boost= 1>>"
   - &species_support_id_partial
     term:
       species_support_id: <<species_support_id>>
@@ -17,11 +15,17 @@ ANCHORS:
     terms:
       restricted_zone_id: <<restricted_zone_id>>
 
-_name_locales:
-  *name_locale_partial
+_names:
+  multi_match:
+    query: <<name>>
+    fields: <<fields>>
+    type: phrase
 
-_negative_name_locales:
-  *name_locale_partial
+_negative_names:
+  multi_match:
+    query: <<name>>
+    fields: <<fields>>
+    type: phrase
 
 _species_support_ids:
   *species_support_id_partial
@@ -45,20 +49,16 @@ item_search:
   - query:
       bool:
         must:
-          - multi_match:
-              query: <<name= ~>>
-              fields: <<_name_locales>>
           - term:
               is_nc: <<is_nc= ~>>
           - term:
               is_pb: <<is_pb= ~>>
+          - <<_names= ~>>
           - <<_species_support_ids= ~>>
           - <<_occupied_zone_ids= ~>>
           - <<_restricted_zone_ids= ~>>
         must_not:
-          - multi_match:
-              query: <<negative_name= ~>>
-              fields: <<_negative_name_locales>>
+          - <<_negative_names= ~>>
           - <<_negative_species_support_ids= ~>>
           - <<_negative_occupied_zone_ids= ~>>
           - <<_negative_restricted_zone_ids= ~>>

app/models/item/search/query.rb

@@ -7,7 +7,7 @@ class Item
         :species_support_id => Fields::SetField,
         :occupied_zone_id => Fields::SetField,
         :restricted_zone_id => Fields::SetField,
-        :name => Fields::TextField
+        :name => Fields::SetField
       }
       
       def initialize(filters, user)
@@ -42,23 +42,30 @@ class Item
           I18n.locales_with_neopets_language_code
         final_flex_params[:locale] = locales.first
         
-        if final_flex_params[:name] || final_flex_params[:negative_name]
+        # Extend the names/negative_names queries with the corresponding
+        # localalized field names.
+        if final_flex_params[:_names] || final_flex_params[:_negative_names]
           locale_entries = locales.map do |locale|
             boost = (locale == I18n.locale) ? 4 : 1
-            {:locale => locale, :boost => boost}
+            "name.#{locale}^#{boost}"
           end
           
-          if final_flex_params[:name]
-            final_flex_params[:_name_locales] = locale_entries
+          # We *could* have set _name_locales once as a partial, but Flex won't
+          # let us call partials from inside other partials. Whatever. Assign
+          # it to each name entry instead. I also feel bad doing this
+          # afterwards, since it's kinda the field's job to return proper flex
+          # params, but that's a refactor for another day.
+          [:_names, :_negative_names].each do |key|
+            if final_flex_params[key]
+              final_flex_params[key].each do |name_query|
+                name_query[:fields] = locale_entries
+              end
             end
-          
-          if final_flex_params[:negative_name]
-            final_flex_params[:_negative_name_locales] = locale_entries
           end
         end
         
         result = FlexSearch.item_search(final_flex_params)
-        result.scoped_loaded_collection(:scopes => {'Item' => Item.with_translations})
+        result.loaded_collection
       end
       
       # Load the text query labels from I18n, so that when we see, say,