Class: BlockKit::Types::Array

Inherits:
ActiveModel::Type::Value
  • Object
show all
Defined in:
lib/block_kit/types/array.rb

Overview

Allows declaring ActiveModel attributes that are arrays of specific types, powered by an internal TypedArray class that enforces type constraints on array elements any time the array is modified.

Direct Known Subclasses

Set

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(item_type) ⇒ Array

Returns a new instance of Array.



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# File 'lib/block_kit/types/array.rb', line 17

def initialize(item_type)
  item_type = ActiveModel::Type.lookup(item_type) if item_type.is_a?(Symbol)
  item_type = Types::Generic.of_type(item_type) if item_type.is_a?(Class) && item_type < BlockKit::Base

  @item_type = item_type
end

Instance Attribute Details

#item_type ⇒ Object (readonly)

Returns the value of attribute item_type.



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# File 'lib/block_kit/types/array.rb', line 11

def item_type
  @item_type
end

Class Method Details

.of(item_type) ⇒ Object 



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# File 'lib/block_kit/types/array.rb', line 13

def self.of(item_type)
  new(item_type)
end

Instance Method Details

#cast(value) ⇒ Object 



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# File 'lib/block_kit/types/array.rb', line 28

def cast(value)
  return nil if value.nil?

  TypedArray.new(item_type, Array(value))
end

#changed_in_place?(raw_old_value, new_value) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/block_kit/types/array.rb', line 40

def changed_in_place?(raw_old_value, new_value)
  cast(raw_old_value) != cast(new_value)
end

#serialize(value) ⇒ Object 



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# File 'lib/block_kit/types/array.rb', line 34

def serialize(value)
  return nil if value.nil?

  cast(value)
end

#type ⇒ Object 



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# File 'lib/block_kit/types/array.rb', line 24

def type
  :array
end