/Ruby on Rails 5.2

class ActionView::FileSystemResolver


A resolver that loads files from the filesystem. It allows setting your own resolving pattern. Such pattern can be a glob string supported by some variables.


Default pattern, loads views the same way as previous versions of rails, eg. when you're looking for users/new it will produce query glob: users/new{.{en},}{.{html,js},}{.{erb,haml},}

FileSystemResolver.new("/path/to/views", ":prefix/:action{.:locale,}{.:formats,}{+:variants,}{.:handlers,}")

This one allows you to keep files with different formats in separate subdirectories, eg. users/new.html will be loaded from users/html/new.erb or users/new.html.erb, users/new.js from users/js/new.erb or users/new.js.erb, etc.

FileSystemResolver.new("/path/to/views", ":prefix/{:formats/,}:action{.:locale,}{.:formats,}{+:variants,}{.:handlers,}")

If you don't specify a pattern then the default will be used.

In order to use any of the customized resolvers above in a Rails application, you just need to configure ActionController::Base.view_paths in an initializer, for example:

ActionController::Base.view_paths = FileSystemResolver.new(

Pattern format and variables

Pattern has to be a valid glob string, and it allows you to use the following variables:

  • :prefix - usually the controller path

  • :action - name of the action

  • :locale - possible locale versions

  • :formats - possible request formats (for example html, json, xml…)

  • :variants - possible request variants (for example phone, tablet…)

  • :handlers - possible handlers (for example erb, haml, builder…)

Public Class Methods

new(path, pattern = nil) Show source
# File actionview/lib/action_view/template/resolver.rb, line 346
def initialize(path, pattern = nil)
  raise ArgumentError, "path already is a Resolver class" if path.is_a?(Resolver)
  @path = File.expand_path(path)
Calls superclass method

Public Instance Methods

Alias for: eql?
eql?(resolver) Show source
# File actionview/lib/action_view/template/resolver.rb, line 357
def eql?(resolver)
  self.class.equal?(resolver.class) && to_path == resolver.to_path
Also aliased as: ==
Alias for: to_s
to_s() Show source
# File actionview/lib/action_view/template/resolver.rb, line 352
def to_s
Also aliased as: to_path

© 2004–2018 David Heinemeier Hansson
Licensed under the MIT License.