ft: where option to includes conditions on rating

lib/rating/models/rating/rating.rb

@@ -29,7 +29,10 @@ module Rating
             (CAST(#{total_count} AS DECIMAL(17, 14)) / #{distinct_count}) count_avg,
             COALESCE(AVG(value), 0)                                       rating_avg
           FROM #{rate_table_name}
-          WHERE resource_type = :resource_type #{scope_type_query(resource, scopeable)}
+          WHERE
+            resource_type = :resource_type
+            #{scope_type_query(resource, scopeable)}
+            #{scope_where_query(resource)}
         ).squish
 
         execute_sql [sql, values]
@@ -54,7 +57,11 @@ module Rating
             COALESCE(SUM(value), 0) rating_sum,
             COUNT(1)                rating_count
           FROM #{rate_table_name}
-          WHERE resource_type = ? AND resource_id = ? #{scope_type_and_id_query(resource, scopeable)}
+          WHERE
+            resource_type = ?
+            AND resource_id = ?
+            #{scope_type_and_id_query(resource, scopeable)}
+            #{scope_where_query(resource)}
         ).squish
 
         values =  [sql, resource.class.base_class.name, resource.id]
@@ -104,7 +111,10 @@ module Rating
         %((
           SELECT GREATEST(#{count}, 1)
           FROM #{rate_table_name}
-          WHERE resource_type = :resource_type #{scope_type_query(resource, scopeable)}
+          WHERE
+            resource_type = :resource_type
+            #{scope_type_query(resource, scopeable)}
+            #{scope_where_query(resource)}
         ))
       end
 
@@ -124,6 +134,16 @@ module Rating
 
         'AND scopeable_type = ? AND scopeable_id = ?'
       end
+
+      def scope_where_query(resource)
+        return '' if where_condition(resource).blank?
+
+        "AND #{where_condition(resource)}"
+      end
+
+      def where_condition(resource)
+        resource.rating_options[:where]
+      end
     end
   end
 end

spec/factories/toy.rb

@@ -0,0 +1,6 @@
+# frozen_string_literal: true
+
+FactoryBot.define do
+  factory :toy do
+  end
+end

spec/models/extension/where_spec.rb

@@ -0,0 +1,33 @@
+# frozen_string_literal: true
+
+require 'rails_helper'
+
+RSpec.describe Rating::Extension, 'unscoped_rating' do
+  let!(:author_1) { create :author }
+  let!(:author_2) { create :author }
+  let!(:author_3) { create :author }
+  let!(:author_4) { create :author }
+  let!(:author_5) { create :author }
+  let!(:resource) { create :toy }
+
+  it 'uses rate with where condition' do
+    author_1.rate resource, 1
+    author_2.rate resource, 2
+    author_3.rate resource, 3
+    author_4.rate resource, 4
+    author_5.rate resource, 5
+
+    ratings = Rating::Rating.all.order('id')
+
+    expect(ratings.size).to eq 1
+
+    rating = ratings[0]
+
+    expect(rating.average.to_s).to  eq '3.0'
+    expect(rating.estimate.to_s).to eq '3.0'
+    expect(rating.resource).to      eq resource
+    expect(rating.scopeable).to     eq nil
+    expect(rating.sum).to           eq 9
+    expect(rating.total).to         eq 3
+  end
+end

spec/support/db/migrate/create_toys_table.rb

@@ -0,0 +1,8 @@
+# frozen_string_literal: true
+
+class CreateToysTable < ActiveRecord::Migration[5.0]
+  def change
+    create_table :toys do |t|
+    end
+  end
+end

spec/support/migrate.rb

@@ -7,6 +7,7 @@ CreateRatingTable.new.change
 
 CreateArticlesTable.new.change
 CreateAuthorsTable.new.change
+CreateToysTable.new.change
 
 CreateGlobalsTable.new.change
 CreateCategoriesTable.new.change

spec/support/models/toy.rb

@@ -0,0 +1,5 @@
+# frozen_string_literal: true
+
+class Toy < ::ActiveRecord::Base
+  rating where: 'value > 1 and value < 5'
+end