instance method
asset_path
Ruby on Rails 6.1.7.10
Since v4.0.13Signature
asset_path(source, options = {})This is the entry point for all assets. When using the asset pipeline (i.e. sprockets and sprockets-rails), the behavior is “enhanced”. You can bypass the asset pipeline by passing in skip_pipeline: true to the options.
All other asset *_path helpers delegate through this method.
With the asset pipeline
All options passed to asset_path will be passed to compute_asset_path which is implemented by sprockets-rails.
asset_path("application.js") # => "/assets/application-60aa4fdc5cea14baf5400fba1abf4f2a46a5166bad4772b1effe341570f07de9.js" asset_path('application.js', host: 'example.com') # => "//example.com/assets/application.js" asset_path("application.js", host: 'example.com', protocol: 'https') # => "https://example.com/assets/application.js"
Without the asset pipeline (skip_pipeline: true)
Accepts a type option that can specify the asset’s extension. No error checking is done to verify the source passed into asset_path is valid and that the file exists on disk.
asset_path("application.js", skip_pipeline: true) # => "application.js" asset_path("filedoesnotexist.png", skip_pipeline: true) # => "filedoesnotexist.png" asset_path("application", type: :javascript, skip_pipeline: true) # => "/javascripts/application.js" asset_path("application", type: :stylesheet, skip_pipeline: true) # => "/stylesheets/application.css"
Options applying to all assets
Below lists scenarios that apply to asset_path whether or not you’re using the asset pipeline.
-
All fully qualified URLs are returned immediately. This bypasses the asset pipeline and all other behavior described.
asset_path("http://www.example.com/js/xmlhr.js") # => "http://www.example.com/js/xmlhr.js"
-
All assets that begin with a forward slash are assumed to be full URLs and will not be expanded. This will bypass the asset pipeline.
asset_path("/foo.png") # => "/foo.png"
-
All blank strings will be returned immediately. This bypasses the asset pipeline and all other behavior described.
asset_path("") # => ""
-
If
config.relative_url_rootis specified, all assets will have that root prepended.Rails.application.config.relative_url_root = "bar" asset_path("foo.js", skip_pipeline: true) # => "bar/foo.js"
-
A different asset host can be specified via
config.action_controller.asset_hostthis is commonly used in conjunction with a CDN.Rails.application.config.action_controller.asset_host = "assets.example.com" asset_path("foo.js", skip_pipeline: true) # => "http://assets.example.com/foo.js"
-
An extension name can be specified manually with
extname.asset_path("foo", skip_pipeline: true, extname: ".js") # => "/foo.js" asset_path("foo.css", skip_pipeline: true, extname: ".js") # => "/foo.css.js"
Parameters
-
sourcereq -
optionsopt = {}
Source
# File actionview/lib/action_view/helpers/asset_url_helper.rb, line 186
def asset_path(source, options = {})
raise ArgumentError, "nil is not a valid asset source" if source.nil?
source = source.to_s
return "" if source.blank?
return source if URI_REGEXP.match?(source)
tail, source = source[/([\?#].+)$/], source.sub(/([\?#].+)$/, "")
if extname = compute_asset_extname(source, options)
source = "#{source}#{extname}"
end
if source[0] != ?/
if options[:skip_pipeline]
source = public_compute_asset_path(source, options)
else
source = compute_asset_path(source, options)
end
end
relative_url_root = defined?(config.relative_url_root) && config.relative_url_root
if relative_url_root
source = File.join(relative_url_root, source) unless source.start_with?("#{relative_url_root}/")
end
if host = compute_asset_host(source, options)
source = File.join(host, source)
end
"#{source}#{tail}"
end
Defined in actionview/lib/action_view/helpers/asset_url_helper.rb line 186
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Defined in ActionView::Helpers::AssetUrlHelper