inertia_test_controller.rb

class MyError
  def to_hash() { uh: 'oh' } end
end

class InertiaTestController < ApplicationController
  layout 'conditional', only: [:with_different_layout]

  def empty_test
    render inertia: 'EmptyTestComponent'
  end

  def with_different_layout
    render inertia: 'EmptyTestComponent'
  end

  def redirect_test
    redirect_to :empty_test
  end

  def inertia_request_test
    if request.inertia?
      head 202
    else
      head 200
    end
  end

  def inertia_partial_request_test
    if request.inertia_partial?
      head 202
    else
      head 200
    end
  end

  def non_inertiafied
    render plain: 'hey'
  end

  # Calling it my_location to avoid this in Rails 5.0
  # https://github.com/rails/rails/issues/28033
  def my_location
    inertia_location empty_test_path
  end

  def redirect_with_inertia_errors
    redirect_to empty_test_path, inertia: { errors: { uh: 'oh' } }
  end

  def redirect_with_non_hash_inertia_errors
    redirect_to empty_test_path, inertia: { errors: 'uh oh' }
  end

  def redirect_with_inertia_error_object
    redirect_to empty_test_path, inertia: { errors: MyError.new }
  end

  def redirect_back_with_inertia_errors
    redirect_back(
      fallback_location: empty_test_path,
      inertia: { errors: { go: 'back!' } }
    )
  end

  def redirect_back_or_to_with_inertia_errors
    redirect_back_or_to(
      empty_test_path,
      inertia: { errors: { go: 'back!' } }
    )
  end

  def error_404
    render inertia: 'ErrorComponent', status: 404
  end

  def error_500
    render inertia: 'ErrorComponent', status: 500
  end

  def content_type_test
    respond_to do |format|
      format.html { render inertia: 'EmptyTestComponent' }
      format.xml { render xml: [ 1, 2, 3 ] }
    end
  end

  def redirect_to_share_test
    redirect_to share_path
  end
end