aboutsummaryrefslogblamecommitdiffstats
path: root/activemodel/lib/active_model/attribute_set.rb
blob: 2f5437ceda13e492b75f6c6cb5d4c6a54580579e (plain) (tree)
1
2
3
4
5
6
7
8
9

                             
                                                 

                                                 
 
                  
                              
                                                          
 



                              



                                              



                              
                               
                                                           

       
               
                                                      


                                

                                                      

       
            
                                                                   

       

                                 

       







                                                                   



                                                          




                        
                


                                                                     

       
                         
                                  







                                    
                  
                  



                                     



                                                              




                                                          



                                    
             
                             

           


                                                         

     
# frozen_string_literal: true

require "active_support/core_ext/object/deep_dup"
require "active_model/attribute_set/builder"
require "active_model/attribute_set/yaml_encoder"

module ActiveModel
  class AttributeSet # :nodoc:
    delegate :each_value, :fetch, :except, to: :attributes

    def initialize(attributes)
      @attributes = attributes
    end

    def [](name)
      attributes[name] || Attribute.null(name)
    end

    def []=(name, value)
      attributes[name] = value
    end

    def values_before_type_cast
      attributes.transform_values(&:value_before_type_cast)
    end

    def to_hash
      initialized_attributes.transform_values(&:value)
    end
    alias_method :to_h, :to_hash

    def key?(name)
      attributes.key?(name) && self[name].initialized?
    end

    def keys
      attributes.each_key.select { |name| self[name].initialized? }
    end

    def fetch_value(name, &block)
      self[name].value(&block)
    end

    def write_from_database(name, value)
      attributes[name] = self[name].with_value_from_database(value)
    end

    def write_from_user(name, value)
      attributes[name] = self[name].with_value_from_user(value)
    end

    def write_cast_value(name, value)
      attributes[name] = self[name].with_cast_value(value)
    end

    def freeze
      @attributes.freeze
      super
    end

    def deep_dup
      self.class.allocate.tap do |copy|
        copy.instance_variable_set(:@attributes, attributes.deep_dup)
      end
    end

    def initialize_dup(_)
      @attributes = attributes.dup
      super
    end

    def initialize_clone(_)
      @attributes = attributes.clone
      super
    end

    def reset(key)
      if key?(key)
        write_from_database(key, nil)
      end
    end

    def accessed
      attributes.select { |_, attr| attr.has_been_read? }.keys
    end

    def map(&block)
      new_attributes = attributes.transform_values(&block)
      AttributeSet.new(new_attributes)
    end

    def ==(other)
      attributes == other.attributes
    end

    protected
      attr_reader :attributes

    private
      def initialized_attributes
        attributes.select { |_, attr| attr.initialized? }
      end
  end
end