claudiob 398267b142 Add #dig to ActionDispatch::Request::Session ... ### Summary The `session` object is not a real Hash but responds to many methods of Hash such as `[]`, `[]`, `fetch`, `has_key?`. Since Ruby 2.3, Hash also supports a `dig` method. This commit adds a `dig` method to `ActionDispatch::Request::Session` with the same behavior as `Hash#dig`. This is useful if you store a hash in your session, such as: ```ruby session[:user] = { id: 1, avatar_url: "http://example.org/nyancat.jpg" } ``` Then you can shorten your code from `session[:user][:avatar_url]` to `session.dig :user, :avatar_url`. ### Other Information I cherry-picked a commit from https://github.com/rails/rails/pull/23864, and modify a bit. The changes are below: * Converts only the first key to a string adjust to the `fetch` method. * Fixes a test case because we cannot use the indifferent access since ee5b621e2f.		2018-04-04 16:20:16 +09:00
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json_params_parsing_test.rb	Use frozen string literal in actionpack/	2017-07-29 14:02:40 +03:00
multipart_params_parsing_test.rb	Use frozen string literal in actionpack/	2017-07-29 14:02:40 +03:00
query_string_parsing_test.rb	Use frozen string literal in actionpack/	2017-07-29 14:02:40 +03:00
session_test.rb	Add #dig to ActionDispatch::Request::Session	2018-04-04 16:20:16 +09:00
url_encoded_params_parsing_test.rb	Use frozen string literal in actionpack/	2017-07-29 14:02:40 +03:00