require(key)
Instance Public methods
Ensures that a parameter is present. If it's present, returns the
parameter at the given key, otherwise raises an
ActionController::ParameterMissing error.
ActionController::Parameters.new(person: { name: 'Francesco' }).require(:person)
# => {"name"=>"Francesco"}
ActionController::Parameters.new(person: nil).require(:person)
# => ActionController::ParameterMissing: param not found: person
ActionController::Parameters.new(person: {}).require(:person)
# => ActionController::ParameterMissing: param not found: person
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