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



36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
 
# File 'lib/custom_fields/types/has_many.rb', line 36

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']}" # 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 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(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