Fix error when config.action_controller.raise_on_missing_callback_act…

…ions is true

app/controllers/trestle/admin_controller.rb

@@ -1,4 +1,8 @@
 class Trestle::AdminController < Trestle::ApplicationController
+  if respond_to?(:raise_on_missing_callback_actions=)
+    self.raise_on_missing_callback_actions = false
+  end
+
   def index
   end
 

spec/dummy/app/admin/singular_post_admin.rb

@@ -0,0 +1,12 @@
+Trestle.resource(:singular_post, model: Post, singular: true) do
+  remove_action :new, :create, :edit, :destroy
+
+  instance do
+    model.first
+  end
+
+  form do |post|
+    text_field :title
+    text_area :body
+  end
+end

spec/dummy/config/environments/development.rb

@@ -46,4 +46,9 @@
   # Use an evented file watcher to asynchronously detect changes in source code,
   # routes, locales, etc. This feature depends on the listen gem.
   # config.file_watcher = ActiveSupport::EventedFileUpdateChecker
+
+  # Raise error when a before_action's only/except options reference missing actions
+  if config.action_controller.respond_to?(:raise_on_missing_callback_actions=)
+    config.action_controller.raise_on_missing_callback_actions = true
+  end
 end

spec/dummy/config/environments/test.rb

@@ -50,4 +50,9 @@
 
   # Raises error for missing translations
   # config.action_view.raise_on_missing_translations = true
+
+  # Raise error when a before_action's only/except options reference missing actions
+  if config.action_controller.respond_to?(:raise_on_missing_callback_actions=)
+    config.action_controller.raise_on_missing_callback_actions = true
+  end
 end

spec/feature/singular_resource_spec.rb

@@ -0,0 +1,30 @@
+require 'spec_helper'
+
+feature 'Singular resources' do
+  scenario 'show' do
+    create_test_post
+
+    visit '/admin/singular_post'
+
+    expect(page).to have_form("/admin/singular_post", "post") {
+      with_text_field "singular_post[title]", "Single Post"
+      with_text_area "singular_post[body]"
+    }
+  end
+
+  scenario 'update record' do
+    create_test_post
+
+    visit '/admin/singular_post'
+
+    fill_in "Title", with: "Updated Title"
+    click_button "Save Post"
+
+    expect(page).to have_content("The post was successfully updated.")
+    expect(page).to have_current_path(/\/admin\/singular_post/)
+  end
+
+  def create_test_post
+    Post.create!(id: 1, title: "Single Post", body: "This is a singular post", published: true)
+  end
+end