Fix searching models by id/created_at/updated_at attributes.

app/models/application_record.rb

@@ -174,12 +174,8 @@ class ApplicationRecord < ActiveRecord::Base
       def search(params = {})
         params ||= {}
 
-        q = all
-        q = search_attribute(:id, params)
-        q = search_attribute(:created_at, params) if attribute_names.include?("created_at")
-        q = search_attribute(:updated_at, params) if attribute_names.include?("updated_at")
-
-        q
+        default_attributes = (attribute_names & %w[id created_at updated_at])
+        search_attributes(params, *default_attributes)
       end
     end
   end

test/functional/application_controller_test.rb

@@ -181,4 +181,15 @@ class ApplicationControllerTest < ActionDispatch::IntegrationTest
       end
     end
   end
+
+  context "all index methods" do
+    should "support searching by the id attribute" do
+      tags = create_list(:tag, 2, post_count: 42)
+      get tags_path(format: :json), params: { search: { id: tags.first.id } }
+
+      assert_response :success
+      assert_equal(1, response.parsed_body.size)
+      assert_equal(tags.first.id, response.parsed_body.first.fetch("id"))
+    end
+  end
 end