Class: ActiveNull::NullModelBuilder

Inherits:
Object
  • Object
show all
Defined in:
lib/active_null/null_model_builder.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(model, overrides) ⇒ NullModelBuilder

Returns a new instance of NullModelBuilder.



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# File 'lib/active_null/null_model_builder.rb', line 7

def initialize(model, overrides)
  @model = model
  @overrides = overrides
end

Instance Attribute Details

#model ⇒ Object (readonly)

Returns the value of attribute model.



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# File 'lib/active_null/null_model_builder.rb', line 5

def model
  @model
end

#overrides ⇒ Object (readonly)

Returns the value of attribute overrides.



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# File 'lib/active_null/null_model_builder.rb', line 5

def overrides
  @overrides
end

Instance Method Details

#build ⇒ Object 



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# File 'lib/active_null/null_model_builder.rb', line 12

def build
  model = self.model
  null = Naught.build do |config|
    config.impersonate model

    model.reflect_on_all_associations.each do |relation|
      if relation.collection?
        define_method(relation.name) { relation.klass.none }
      else
        define_method(relation.name) do
          return unless relation.klass.respond_to? :null
          relation.klass.null
        end
      end
    end

    model.column_defaults.each do |field, default|
      define_method(field.to_sym) { default }
    end

    def nil?
      true
    end

    def present?
      false
    end

    def blank?
      true
    end

    def to_json
      '{}'
    end

    if Object.const_defined? 'Draper'
      def decorate(options = {})
        decorator_class.decorate(self, options)
      end

      def decorator_class
        self.class.decorator_class
      end

      def decorator_class?
        self.class.decorator_class?
      end

      def applied_decorators
        []
      end

      def decorated_with?(decorator_class)
        false
      end

      def decorated?
        false
      end
    end
  end
  null.send(:include, Draper::Decoratable) if Object.const_defined? 'Draper'
  null.send(:include, overrides) if overrides
  set_null_model null
end

#full_name ⇒ Object 



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# File 'lib/active_null/null_model_builder.rb', line 84

def full_name
  return name if model.parent == Object
  "#{model.parent.name}::#{name}"
end

#name ⇒ Object 



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# File 'lib/active_null/null_model_builder.rb', line 79

def name
  base_name = model.name.split('::').last
  "Null#{base_name}"
end

#set_null_model(null) ⇒ Object 



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# File 'lib/active_null/null_model_builder.rb', line 89

def set_null_model(null)
  model.parent.const_set name, null
end