feat: enable custom validation via yml config

lib/rating/config.rb

@@ -21,5 +21,18 @@ module Rating
     def rating_table
       @rating_table ||= config[__method__.to_s] || 'rating_ratings'
     end
+
+    def validations
+      @validations ||= begin
+        default_scope = %w[author_type resource_id resource_type scopeable_id scopeable_type]
+
+        {
+          rate: {
+            case_sensitive: config.dig('validations', 'rate', 'case_sensitive') || false,
+            scope:          config.dig('validations', 'rate', 'scope') || default_scope
+          }
+        }.deep_stringify_keys
+      end
+    end
   end
 end

lib/rating/models/rating/rate.rb

@@ -15,8 +15,8 @@ module Rating
     validates :value, numericality: { greater_than_or_equal_to: 1, less_than_or_equal_to: 100 }
 
     validates :author_id, uniqueness: {
-      case_sensitive: false,
-      scope:          %i[author_type resource_id resource_type scopeable_id scopeable_type]
+      case_sensitive: ::Rating::Config.validations['rate']['case_sensitive'],
+      scope:          ::Rating::Config.validations['rate']['scope'].map(&:to_sym)
     }
 
     def self.create(author:, extra_scopes:, metadata:, resource:, scopeable: nil, value:)

spec/config/validations_spec.rb

@@ -0,0 +1,27 @@
+# frozen_string_literal: true
+
+require 'rails_helper'
+
+RSpec.describe Rating::Config, '.validations' do
+  context 'when rating.yml does not exist' do
+    it do
+      expect(subject.validations).to eq({
+        rate: {
+          case_sensitive: false,
+          scope:          %w[author_type resource_id resource_type scopeable_id scopeable_type]
+        }
+      }.deep_stringify_keys)
+    end
+  end if ENV['CONFIG_ENABLED_WITH_EXTRA_SCOPES'] != 'true'
+
+  context 'when rating.yml exists' do
+    it do
+      expect(subject.validations).to eq({
+        rate: {
+          case_sensitive: false,
+          scope:          %w[author_type resource_id resource_type scopeable_id scopeable_type scope_1 scope_2]
+        }
+      }.deep_stringify_keys)
+    end
+  end if ENV['CONFIG_ENABLED_WITH_EXTRA_SCOPES'] == 'true'
+end