Formatters

Blueprinter V2 has a more flexible and ergonomic approach to formatting, allowing any class to define its own formatter in a single line:

class MyBlueprint < ApplicationBlueprint
  format(Date) { |date| date.iso8601 }
  format TrueClass, :boolean_str
  format FalseClass, :boolean_str

  def boolean_str(bool)
    bool ? "Y" : "N"
  end
end

If your formatter needs more information (field details, options passed to render, etc) use the around_field_value, around_object_value, and around_collection_value extension hooks. See Blueprinter::Extension for the full API, or get started with the Extension Guide.