class Assert::Assertions::NotNil(PropertyType)

Overview

Validates a property is not nil.

Example

class Example
  include Assert

  def initialize; end

  @[Assert::NotNil]
  property nilable_int : Int32? = 17

  @[Assert::NotNil]
  property nilable_string : String? = "Bob"
end

Example.new.valid? # => true

Defined in:

assertions/not_nil.cr

Constructors

Instance Method Summary

Instance methods inherited from class Assert::Assertions::Assertion

default_message_template : String default_message_template, groups : Array(String) groups, message : String message, message_template : String message_template, property_name : String property_name, valid? : Bool valid?

Constructor methods inherited from class Assert::Assertions::Assertion

new(property_name : String, message : String | Nil = nil, groups : Array(String) | Nil = nil) new

Constructor Detail

def self.new(property_name : String, actual : PropertyType, message : String | Nil = nil, groups : Array(String) | Nil = nil) #

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Instance Method Detail

def default_message_template : String #

Returns the default #message_template to use if no message is provided.


[View source]
def message : String #

The message to display if self is not valid.

NOTE This method is defined automatically, and is just present for documentation purposes.


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def valid? : Bool #

Returns true if a property satisfies self, otherwise false.


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