Module: CustomFields::Types::HasMany::Target::ClassMethods

Defined in:
lib/custom_fields/types/has_many.rb

Instance Method Summary collapse

Instance Method Details

#apply_has_many_custom_field(klass, rule) ⇒ Object

Adds a has_many relationship between 2 mongoid models

Parameters:

  • klass (Class) —

    The class to modify

  • rule (Hash) —

    It contains the name of the relation and if it is required or not



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# File 'lib/custom_fields/types/has_many.rb', line 28

def apply_has_many_custom_field(klass, rule)
  # puts "#{klass.inspect}.has_many #{rule['name'].inspect}, class_name: #{rule['class_name'].inspect}, inverse_of: #{rule['inverse_of']}, order_by: #{rule['order_by'].inspect}" # DEBUG
  position_name = "position_in_#{rule['inverse_of']}"

  _order_by   = rule['order_by'] || position_name.to_sym.asc
  _inverse_of = rule['inverse_of'].blank? ? nil : rule['inverse_of'] # an empty String can cause weird behaviours

  klass.has_many rule['name'], class_name: rule['class_name'], inverse_of: _inverse_of, order: _order_by, validate: false do

    def filtered(conditions = {}, order_by = nil)
      list = conditions.empty? ? self.unscoped : self.where(conditions)

      if order_by
        list.order_by(order_by)
      else
        list.order_by(relation_metadata.order)
      end
    end
    alias :ordered :filtered # backward compatibility + semantic purpose
  end

  klass.accepts_nested_attributes_for rule['name'], allow_destroy: true

  if rule['required']
    klass.validates_collection_size_of rule['name'], minimum: 1, message: :at_least_one_element, on: :update
  end
end