Flowdock
method

require

Importance_1
Ruby on Rails latest stable (v4.2.1) - 0 notes - Class: Parameters
require(key) public

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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