add new tables and models for join through association

spec/lib/pg_searchable_new_spec.rb

@@ -161,9 +161,9 @@ describe PgSearchable do
       describe 'searching in model with has_many association' do
         before do
           records = DynamicModelWithTagValues.create [{ name: 'something', value: 'amazing' },
-                                                                        { name: 'new record', value: 'not so amazing' },
-                                                                        { name: 'last one', value: 'no value' },
-                                                                        { name: 'really last one', value: 'no value' }]
+                                                      { name: 'new record', value: 'not so amazing' },
+                                                      { name: 'last one', value: 'no value' },
+                                                      { name: 'really last one', value: 'no value' }]
 
           Tag.create [{ taggable: records[0], value: 'red', custom_attribute: 'rose' },
                       { taggable: records[0], value: 'green', custom_attribute: 'garden' },
@@ -242,9 +242,9 @@ describe PgSearchable do
       describe 'searching in model with multiple has_many associations' do
         before do
           records = DynamicModelWithTagAndCategories.create [{ name: 'something', value: 'amazing' },
-                                                                        { name: 'new record', value: 'not so amazing' },
-                                                                        { name: 'last one', value: 'no value' },
-                                                                        { name: 'really last one', value: 'no value' }]
+                                                             { name: 'new record', value: 'not so amazing' },
+                                                             { name: 'last one', value: 'no value' },
+                                                             { name: 'really last one', value: 'no value' }]
 
           Tag.create [{ taggable: records[0], value: 'red', custom_attribute: 'rose' },
                       { taggable: records[0], value: 'green', custom_attribute: 'garden' },
@@ -285,6 +285,68 @@ describe PgSearchable do
           expect(DynamicModelWithTagAndCategories.scope_search('(tag:- and not tag:12) or (value:"amazing" and not value:"not") or (category:unknown or category:math)')).to contain_exactly(records[0], records[2], records[3])
         end
       end
+
+      describe 'joins with through association' do
+        let(:players) { Player.all }
+
+        before do
+          players = Player.create([{ name: 'first', value: 'downtown' },
+                                   { name: 'redliner', value: 'uptown' },
+                                   { name: 'flying', value: 'eagle' },
+                                   { name: 'blue', value: 'marine' }])
+
+
+          ptags = Ptag.create [{ value: 'e-ink' },
+                               { value: 'black&white' },
+                               { value: 'rich' },
+                               { value: 'grayscale' },
+                               { value: 'LED' }]
+
+          players[0].ptags << ptags[0..1]
+          players[1].ptags << ptags[0..2]
+          players[2].ptags << ptags[2..3]
+          players[3].ptags << ptags[4]
+        end
+
+        it 'can search in default column of model with through association' do
+          expect(Player.scope_search('l and not y and not blue')).to contain_exactly(players[1])
+        end
+
+        it 'can search in referenced column associated with through relation - simple search' do
+          expect(Player.scope_search('tag:e-ink')).to contain_exactly(players[0], players[1])
+        end
+
+        it 'can search in referenced column associated with through relaction - simple search with OR operator' do
+          expect(Player.scope_search('tag:e-ink OR tag:rich')).to contain_exactly(players[0], players[1], players[2])
+        end
+
+        it 'can search in referenced column associated with through relaction - simple search with AND operator' do
+          expect(Player.scope_search('tag:e-ink AND tag:rich')).to contain_exactly(players[1])
+        end
+
+        it 'can search in referenced column associated with through relaction - simple search with NOT operator' do
+          puts "==========="
+          puts Player.scope_search('NOT tag:e-ink').inspect
+          puts "==============="
+          expect(Player.scope_search('NOT tag:e-ink')).to contain_exactly(players[2], players[3])
+        end
+
+        it 'can search in referenced column associated with through relaction - mixed search terms with OR' do
+          expect(Player.scope_search('tag:e-ink OR blue')).to contain_exactly(players[0], players[1], players[3])
+        end
+
+        it 'can search in referenced column associated with through relaction - mixed search terms with AND' do
+          expect(Player.scope_search('tag:e-ink AND first')).to contain_exactly(players[0])
+        end
+
+        it 'can search in referenced column associated with through relaction - mixed search terms with OR NOT' do
+          expect(Player.scope_search('tag:led OR NOT first')).to contain_exactly(players[1], players[2], players[3])
+        end
+
+        it 'can search in referenced column associated with through relaction - mixed search terms with AND NOT' do
+          expect(Player.scope_search('tag:e-ink AND NOT first')).to contain_exactly(players[1])
+        end
+      end
     end
   end
 end

spec/schema.rb

@@ -44,4 +44,19 @@ ActiveRecord::Schema.define do
     t.string :name
     t.timestamps null: false
   end
+
+  create_table :players, force: true do |t|
+    t.string :name
+    t.string :value
+    t.timestamps null: false
+  end
+
+  create_table :ptags, force: true do |t|
+    t.string :value
+  end
+
+  create_table :taggings, force: true do |t|
+    t.belongs_to :player
+    t.belongs_to :ptag
+  end
 end

spec/support/models.rb

@@ -129,3 +129,21 @@ class Category < ActiveRecord::Base
   has_many :tags
   belongs_to :categoriable, polymorphic: true
 end
+
+class Player < ActiveRecord::Base
+  include PgSearchable
+  pg_search fields: %i[players.id players.name players.value], default_fields: [:name], fields_mappings: { tag: 'ptags.value' }, joins: [:ptags]
+  has_many :taggings
+  has_many :ptags, through: :taggings
+end
+
+class Ptag < ActiveRecord::Base
+  self.table_name = :ptags
+  has_many :taggings
+  has_many :players, through: :taggings
+end
+
+class Tagging < ActiveRecord::Base
+  belongs_to :player
+  belongs_to :ptag
+end