instance method `fetch`

Ruby on Rails 5.2.8.1

Since v4.0.13

Available in: v4.0.13 v4.1.16 v4.2.9 v5.2.8.1 v6.0.6 v6.1.7.10 v7.0.10 v7.1.6 v7.2.3 v8.0.4 v8.1.2

Compare with:

fetch(key, default = DEFAULT)

Returns the value for the given key mapped to @env.

If the key is not found and an optional code block is not provided, raises a KeyError exception.

If the code block is provided, then it will be run and its result returned.

Parameters

key req
default opt = DEFAULT

Source

# File actionpack/lib/action_dispatch/http/headers.rb, line 87
      def fetch(key, default = DEFAULT)
        @req.fetch_header(env_name(key)) do
          return default unless default == DEFAULT
          return yield if block_given?
          raise KeyError, key
        end
      end

Defined in actionpack/lib/action_dispatch/http/headers.rb line 87 · View on GitHub · Improve this page · Find usages on GitHub

Defined in ActionDispatch::Http::Headers

Signature

Parameters