Fix #3376: Polymorphic associations don't work with namespaced classes

CHANGELOG.md

@@ -4,6 +4,7 @@
 
 [Full Changelog](https://github.com/sferik/rails_admin/compare/v2.2.1...HEAD)
 
+- Fix polymorphic associations don't work with namespaced classes([#3376](https://github.com/sferik/rails_admin/issues/3376))
 
 ## [2.2.1](https://github.com/sferik/rails_admin/tree/v2.2.0) - 2021-08-08
 

app/assets/javascripts/rails_admin/ra.widgets.js

@@ -202,7 +202,7 @@
         urls = type_select.data('urls');
         type_select.on('change', function(e) {
           var selected_data, selected_type;
-          selected_type = type_select.val().toLowerCase();
+          selected_type = type_select.val().toLowerCase().replace(/::/g, '-');
           selected_data = $("#" + selected_type + "-js-options").data('options');
           object_select.data('options', selected_data);
           object_select.filteringSelect("destroy");

app/views/rails_admin/main/_form_polymorphic_association.html.haml

@@ -10,11 +10,10 @@
   default_options = { float_left: false }
 
   js_data = type_collection.inject({}) do |options, model|
-    model_name = model.second.underscore.downcase
     source_abstract_model = RailsAdmin.config(form.object.class).abstract_model
-    options.merge(model_name.gsub("_", "") => {
+    options.merge(model.second.downcase.gsub('::', '-') => {
       xhr: true,
-      remote_source: index_path(model_name, source_object_id: form.object.id, source_abstract_model: source_abstract_model.to_param, current_action: current_action, compact: true),
+      remote_source: index_path(model.second.underscore, source_object_id: form.object.id, source_abstract_model: source_abstract_model.to_param, current_action: current_action, compact: true),
       float_left: false
     })
   end

spec/dummy_app/app/active_record/two_level/namespaced.rb

@@ -0,0 +1,7 @@
+module TwoLevel
+  module Namespaced
+    def self.table_name_prefix
+      'two_level_namespaced_'
+    end
+  end
+end

spec/dummy_app/app/active_record/two_level/namespaced/polymorphic_association_test.rb

@@ -0,0 +1,7 @@
+module TwoLevel
+  module Namespaced
+    class PolymorphicAssociationTest < ActiveRecord::Base
+      has_many :comments, as: :commentable
+    end
+  end
+end

spec/dummy_app/db/migrate/20210811121027_create_two_level_namespaced_polymorphic_association_tests.rb

@@ -0,0 +1,9 @@
+class CreateTwoLevelNamespacedPolymorphicAssociationTests < ActiveRecord::Migration[5.0]
+  def change
+    create_table :two_level_namespaced_polymorphic_association_tests do |t|
+      t.string :name
+
+      t.timestamps
+    end
+  end
+end

spec/factories.rb

@@ -97,4 +97,8 @@
             parent: :paper_trail_test,
             class: 'PaperTrailTestWithCustomAssociation'
   end
+
+  factory :two_level_namespaced_polymorphic_association_test, class: "TwoLevel::Namespaced::PolymorphicAssociationTest" do
+    sequence(:name) { |n| "name #{n}" }
+  end
 end

spec/integration/fields/polymorphic_assosiation_spec.rb

@@ -24,6 +24,27 @@
       expect(@comment.commentable_type).to eq 'Ball'
       expect(@comment.commentable).to eq @hardball
     end
+
+    context 'when the associated model is declared in a two-level namespace' do
+      it 'successfully saves the record', js: true do
+        polymorphic_association_tests = ['Jackie Robinson', 'Rob Wooten'].map do |name|
+          FactoryBot.create(:two_level_namespaced_polymorphic_association_test, name: name)
+        end
+
+        visit new_path(model_name: 'comment')
+
+        select 'Polymorphic association test', from: 'comment[commentable_type]'
+        find('input.ra-filtering-select-input').set('Rob')
+
+        page.execute_script("$('input.ra-filtering-select-input').trigger('focus')")
+        page.execute_script("$('input.ra-filtering-select-input').trigger('keydown')")
+        expect(page).to have_selector('ul.ui-autocomplete li.ui-menu-item a')
+
+        page.execute_script %{$('ul.ui-autocomplete li.ui-menu-item a:contains("Jackie Robinson")').trigger('mouseenter').click()}
+        click_button 'Save'
+        expect(Comment.first.commentable).to eq polymorphic_association_tests.first
+      end
+    end
   end
 
   context 'on update' do