dry-struct defaults

defaults.md

As a default in the model

class MyModel < Sry::Struct
  attribute :created_at, ::Types::Strict::Time.default(-> _ { Time.now }.freeze)
  # attribute :created_at, ::Types::Strict::Time.default(Proc.new { Time.now }.freeze)
  # attribute :created_at, ::Types::Strict::Time.default(lambda { |_| Time.now }.freeze)
end

Or in the database:

db.create_table table_name do
  DateTime :created_at, null: false, default: Sequel.lit('CURRENT_TIMESTAMP')
end

class MyModel < Sry::Struct
  attribute :created_at, ::Types::Strict::Time.meta(omittable: true)
end