Class: Tessa::DynamicExtensions::SingleRecord

Inherits:
Tessa::DynamicExtensions show all
Defined in:
lib/tessa/model/dynamic_extensions.rb

Instance Attribute Summary

Attributes inherited from Tessa::DynamicExtensions

#field

Instance Method Summary collapse

Methods inherited from Tessa::DynamicExtensions

#initialize, #name

Constructor Details

This class inherits a constructor from Tessa::DynamicExtensions

Instance Method Details

#build(mod) ⇒ Object 



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# File 'lib/tessa/model/dynamic_extensions.rb', line 17

def build(mod)
  mod.class_eval <<~CODE, __FILE__, __LINE__ + 1
      def #{name}
        # has_one_attached defines the getter using class_eval so we can't call
        # super() here.
        if #{name}_attachment.present?
          return Tessa::ActiveStorage::AssetWrapper.new(#{name}_attachment)
        end

        # fall back to old Tessa fetch if not present
        if field = self.class.tessa_fields["#{name}".to_sym]
          @#{name} ||= fetch_tessa_remote_assets(field.id(on: self))
        end
      end

      def #{field.id_field}
        # Use the attachment's key
        return #{name}_attachment.key if #{name}_attachment.present?

        # fallback to Tessa's database column
        super
      end

      def #{name}=(attachable)
        # Every new upload is going to ActiveStorage
        a = @active_storage_attached_#{name} ||=
          ::ActiveStorage::Attached::One.new("#{name}", self, dependent: :purge_later)
        
        case attachable
        when Tessa::AssetChangeSet
          attachable.changes.select(&:remove?).each { a.detach }
          attachable.changes.select(&:add?).each do |change|
            next if #{field.id_field} == change.id

            a.attach(change.id)
          end
        when nil
          a.detach
        else
          a.attach(attachable)
        end

        # overwrite the tessa ID in the database
        self.#{field.id_field} = nil
      end

      def attributes
        super.merge({
          '#{field.id_field}' => #{field.id_field},
          '_tessa_#{field.id_field}' => super['#{field.id_field}']
        })
      end
    CODE
  mod
end