Class: SimpleMaster::Master::Association::BelongsToPolymorphicAssociation

Inherits:
SimpleMaster::Master::Association show all
Defined in:
lib/simple_master/master/association/belongs_to_polymorphic_association.rb

Instance Attribute Summary

Attributes inherited from SimpleMaster::Master::Association

#defined_at, #name, #options

Instance Method Summary collapse

Methods inherited from SimpleMaster::Master::Association

#initialize

Constructor Details

This class inherits a constructor from SimpleMaster::Master::Association

Instance Method Details

#foreign_key ⇒ Object 



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# File 'lib/simple_master/master/association/belongs_to_polymorphic_association.rb', line 7

def foreign_key
  @foreign_key ||= (options[:foreign_key] || ActiveSupport::Inflector.foreign_key(name)).to_sym
end

#foreign_type ⇒ Object 



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# File 'lib/simple_master/master/association/belongs_to_polymorphic_association.rb', line 11

def foreign_type
  @foreign_type ||= options[:foreign_type] || :"#{name}_type"
end

#foreign_type_class ⇒ Object 



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# File 'lib/simple_master/master/association/belongs_to_polymorphic_association.rb', line 15

def foreign_type_class
  @foreign_type_class ||= :"#{foreign_type}_class"
end

#init(master_class) ⇒ Object 



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# File 'lib/simple_master/master/association/belongs_to_polymorphic_association.rb', line 28

def init(master_class)
  unless master_class.method_defined?(foreign_type_class)
    fail "[#{master_class}] Please specify `polymorphic_type: true` on polymorphic type column <#{name}>."
  end

  master_class.simple_master_module.class_eval <<-RUBY, __FILE__, __LINE__ + 1
    def #{name}
      return nil if #{foreign_type_class}.nil?

      if #{foreign_type_class} < SimpleMaster::Master
        #{foreign_type_class}.find_by_id(#{foreign_key})
      else
        belongs_to_store[:#{name}] ||= #{foreign_type_class}.simple_master_connection.find_by(id: #{foreign_key})
      end
    end
  RUBY
end

#init_for_test(master_class) ⇒ Object 



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# File 'lib/simple_master/master/association/belongs_to_polymorphic_association.rb', line 46

def init_for_test(master_class)
  master_class.simple_master_module.class_eval <<-RUBY, __FILE__, __LINE__ + 1
    def #{name}
      return nil if #{foreign_type_class}.nil?

      if #{foreign_type_class} < SimpleMaster::Master
        belongs_to_store[:#{name}] || #{foreign_type_class}.find_by_id(#{foreign_key})
      else
        belongs_to_store[:#{name}] ||= #{foreign_type_class}.simple_master_connection.find_by(id: #{foreign_key})
      end
    end

    def #{name}=(value)
      @_association_#{name}_source = self.#{foreign_key} = value&.id
      @_association_#{name}_class_source = self.#{foreign_type_class} = value&.class
      belongs_to_store[:#{name}] = value
    end

    def _#{name}_target_save?
      # Skip saving the association if the key changed after assignment
      return false if @_association_#{name}_source != #{foreign_key}
      return false if @_association_#{name}_class_source != #{foreign_type_class}

      target = belongs_to_store[:#{name}]
      return false if target.nil?

      true
    end
  RUBY
end

#is_active_record? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/simple_master/master/association/belongs_to_polymorphic_association.rb', line 19

def is_active_record?
  # target_class will be dynamically loaded.
  false
end

#target_class ⇒ Object 



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# File 'lib/simple_master/master/association/belongs_to_polymorphic_association.rb', line 24

def target_class
  fail
end