class Stannum::Constraints::Presence
A presence constraint asserts that the object is not nil and not empty.
@example Using a Presence
constraint
constraint = Stannum::Constraints::Presence.new constraint.matches?(nil) #=> false constraint.matches?(Object.new) #=> true
@example Using a Presence
constraint with an Array
constraint.matches?([]) #=> false constraint.matches?([1, 2, 3]) #=> true
@example Using a Presence
constraint with an Hash
constraint.matches?({}) #=> false constraint.matches?({ key: 'value' }) #=> true
Constants
- NEGATED_TYPE
The :type of the error generated for a matching object.
- TYPE
The :type of the error generated for a non-matching object.
Public Instance Methods
matches?(actual)
click to toggle source
Checks that the object is not nil and not empty.
@return [true, false] false if the object is nil or empty, otherwise true.
@see Stannum::Constraint#matches?
# File lib/stannum/constraints/presence.rb, line 33 def matches?(actual) return false if actual.nil? return false if actual.respond_to?(:empty?) && actual.empty? true end
Also aliased as: match?