Module: ActiveAdmin::Decorator::Association

Defined in:
lib/activeadmin/decorator/association.rb

Class Method Summary collapse

Class Method Details

.decorate(association, with: nil, parent: nil) ⇒ Object

Raises:

  • (ArgumentError) 


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# File 'lib/activeadmin/decorator/association.rb', line 7

def decorate(association, with: nil, parent: nil)
  raise ArgumentError, "parent or with required" if parent.nil? && with.nil?

  if association.nil?
    nil
  elsif association.respond_to?(:each)
    decorate_many(association, with, parent)
  else
    decorate_one(association, with, parent)
  end
end

.decorate_many(association, with, parent) ⇒ Object 



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# File 'lib/activeadmin/decorator/association.rb', line 19

def decorate_many(association, with, parent)
  with ||=
    if association.is_a?(ActiveRecord::Relation)
      decorator_class_name_for(parent, association.klass)
    else
      decorator_class_name_for(parent, association.first.class)
    end
  with = with.constantize if with.is_a?(String)
  association.map { |item| with.new(item) }
end

.decorate_one(element, with, parent) ⇒ Object 



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# File 'lib/activeadmin/decorator/association.rb', line 30

def decorate_one(element, with, parent)
  with ||= decorator_class_name_for(parent, element.class)
  with = with.constantize if with.is_a?(String)
  with.new(element)
end

.decorator_class_name_for(parent, klass) ⇒ Object 



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# File 'lib/activeadmin/decorator/association.rb', line 36

def decorator_class_name_for(parent, klass)
  parent_class_elements = parent.class.name.split("::")
  prefix = parent_class_elements[0...-1]
  suffix = parent_class_elements[-1].sub(/^#{parent.model.class.name}/, "")
  [*prefix, klass].join("::").concat(suffix)
end