method

fetch

Importance_2
fetch(key, *args) public

Returns a parameter for the given key. If the key can’t be found, there are several options: With no other arguments, it will raise an ActionController::ParameterMissing error; if a second argument is given, then that is returned (converted to an instance of ActionController::Parameters if possible); if a block is given, then that will be run and its result returned.

params = ActionController::Parameters.new(person: { name: "Francesco" }) params.fetch(:person) # => <ActionController::Parameters {"name"=>"Francesco"} permitted: false> params.fetch(:none) # => ActionController::ParameterMissing: param is missing or the value is empty: none params.fetch(:none, {}) # => <ActionController::Parameters {} permitted: false> params.fetch(:none, "Francesco") # => "Francesco" params.fetch(:none) { "Francesco" } # => "Francesco"
Show source
Register or log in to add new notes.