Text search now properly weighted and ranked

Default order by 'name' removed so that ranking can actually work.

app/models/package.rb

@@ -4,7 +4,12 @@ class Package < ActiveRecord::Base
   include PgSearch
   # TODO: Make search weighted on users' rating
   pg_search_scope :general_search,
-    :against => [:name, :description, :long_description],
+    # :against => [:name, :description, :long_description],
+    :against => [
+      [:name, 'A'],
+      [:description, 'B'],
+      [:long_description, 'C']
+    ],
     :using => {
       :tsearch => {:dictionary => "english"}
     }
@@ -14,9 +19,9 @@ class Package < ActiveRecord::Base
   # screenshot files from disk.
   has_many :screenshots, :inverse_of=>:package, :dependent => :destroy
 
-  default_scope {
+  # default_scope {
-    order('name ASC')
+    # order('name ASC')
-  }
+  # }
 
   # Return a query of all packages that have screenshots
   def self.with_screenshots

db/migrate/20160812085722_make_fulltext_search_index_weighted.rb

@@ -0,0 +1,14 @@
+# PostregreSQL text searches are now using weights. So the index has to reflect that.
+class MakeFulltextSearchIndexWeighted < ActiveRecord::Migration
+  def change
+    execute "drop index packages_fts"
+
+    execute "create index packages_fts on packages using gin((
+        setweight( to_tsvector('english', coalesce(\"packages\".\"name\"::text, '')), 'A' )
+        ||
+        setweight( to_tsvector('english', coalesce(\"packages\".\"description\"::text, '')), 'B' )
+        ||
+        setweight( to_tsvector('english', coalesce(\"packages\".\"long_description\"::text, '')), 'C' )
+      ))"
+  end
+end