optimized people search

app/models/person.rb

@@ -47,39 +47,25 @@ class Person < ActiveRecord::Base
   def self.search_query_string(query)
     if postgres?
       where_clause = <<-SQL
-        profiles.first_name ILIKE ? OR
-        profiles.last_name ILIKE ? OR
-        people.diaspora_handle ILIKE ?
+        profiles.full_name ILIKE ? OR
+        profiles.diaspora_handle ILIKE ?
       SQL
     else
       where_clause = <<-SQL
-        profiles.first_name LIKE ? OR
-        profiles.last_name LIKE ? OR
-        people.diaspora_handle LIKE ? OR
-        profiles.first_name LIKE ? OR
-        profiles.last_name LIKE ?
+        profiles.full_name LIKE ? OR
+        people.diaspora_handle LIKE ?
       SQL
     end
 
-    sql = ""
-    tokens = []
-
-    query_tokens = query.to_s.strip.split(" ")
-    query_tokens.each_with_index do |raw_token, i|
-      token = "#{raw_token}%"
-      up_token = "#{raw_token.titleize}%"
-      sql << " OR " unless i == 0
-      sql << where_clause
-      tokens.concat([token, token, token])
-      tokens.concat([up_token, up_token]) unless postgres?
-    end
-    [sql, tokens]
+    q_tokens = query.to_s.strip.gsub(/(\s|$|^)/) { "%#{$1}" }
+    [where_clause, [q_tokens, q_tokens]]
   end
 
   def self.search(query, user)
     return [] if query.to_s.blank? || query.to_s.length < 3
 
     sql, tokens = self.search_query_string(query)
+
     Person.searchable.where(sql, *tokens).joins(
       "LEFT OUTER JOIN contacts ON contacts.user_id = #{user.id} AND contacts.person_id = people.id"
     ).includes(:profile

app/models/profile.rb

@@ -45,6 +45,7 @@ class Profile < ActiveRecord::Base
   end
   before_save do
     self.build_tags
+    self.construct_full_name
   end
 
   def subscribers(user)
@@ -120,6 +121,13 @@ class Profile < ActiveRecord::Base
     end
   end
 
+  # Constructs a full name by joining #first_name and #last_name
+  # @returns [String] A full name
+  def construct_full_name
+    self.full_name = [self.first_name, self.last_name].join(' ').downcase
+    self.full_name
+  end
+
   protected
   def strip_names
     self.first_name.strip! if self.first_name

db/migrate/20110729045734_add_full_name_to_profile.rb

@@ -0,0 +1,22 @@
+class AddFullNameToProfile < ActiveRecord::Migration
+  def self.up
+    add_column :profiles, :full_name, :string, :limit => 70
+
+    add_index :profiles, :full_name
+    add_index :profiles, [:full_name, :searchable]
+    remove_index :profiles, [:first_name, :last_name, :searchable]
+    remove_index :profiles, [:first_name, :searchable]
+    remove_index :profiles, [:last_name, :searchable]
+
+    execute("UPDATE profiles SET full_name=LOWER(CONCAT(first_name, ' ', last_name))")
+  end
+
+  def self.down
+    remove_index :profiles, :column => :full_name
+    remove_column :profiles, :full_name
+
+    add_index :profiles, [:first_name, :searchable]
+    add_index :profiles, [:last_name, :searchable]
+    add_index :profiles, [:first_name, :last_name, :searchable]
+  end
+end

db/schema.rb

@@ -10,7 +10,7 @@
 #
 # It's strongly recommended to check this file into your version control system.
 
-ActiveRecord::Schema.define(:version => 20110710102747) do
+ActiveRecord::Schema.define(:version => 20110729045734) do
 
   create_table "aspect_memberships", :force => true do |t|
     t.integer  "aspect_id",  :null => false
@@ -295,11 +295,11 @@ ActiveRecord::Schema.define(:version => 20110710102747) do
     t.datetime "created_at"
     t.datetime "updated_at"
     t.string   "location"
+    t.string   "full_name",        :limit => 70
   end
 
-  add_index "profiles", ["first_name", "last_name", "searchable"], :name => "index_profiles_on_first_name_and_last_name_and_searchable"
-  add_index "profiles", ["first_name", "searchable"], :name => "index_profiles_on_first_name_and_searchable"
-  add_index "profiles", ["last_name", "searchable"], :name => "index_profiles_on_last_name_and_searchable"
+  add_index "profiles", ["full_name", "searchable"], :name => "index_profiles_on_full_name_and_searchable"
+  add_index "profiles", ["full_name"], :name => "index_profiles_on_full_name"
   add_index "profiles", ["person_id"], :name => "index_profiles_on_person_id"
 
   create_table "service_users", :force => true do |t|

spec/models/person_spec.rb

@@ -36,7 +36,6 @@ describe Person do
     end
   end
 
-
   describe '#diaspora_handle' do
     context 'local people' do
       it 'uses the pod config url to set the diaspora_handle' do

spec/models/profile_spec.rb

@@ -29,6 +29,18 @@ describe Profile do
       end
     end
 
+    describe '#contruct_full_name' do
+      it 'generates a full name given first and last names' do
+        profile = Factory(:person).profile
+        profile.first_name = "casimiro"
+        profile.last_name = "grippi"
+
+        profile.full_name.should_not == "casimiro grippi"
+        profile.save
+        profile.full_name.should == "casimiro grippi"
+      end
+    end
+
     describe "of last_name" do
       it "strips leading and trailing whitespace" do
         profile = Factory.build(:profile, :last_name => "     Ohba    ")