Module: CustomFields::Types::BelongsTo::Target::ClassMethods

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

Instance Method Summary collapse

Instance Method Details

#apply_belongs_to_custom_field(klass, rule) ⇒ Object

Adds a belongs_to relationship between 2 models

Parameters:

  • klass (Class) —

    The class to modify

  • rule (Hash) —

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



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# File 'lib/custom_fields/types/belongs_to.rb', line 36

def apply_belongs_to_custom_field(klass, rule)
  # puts "#{klass.inspect}.belongs_to #{rule['name'].inspect}, class_name: #{rule['class_name'].inspect}" # DEBUG

  position_name = "position_in_#{rule['name'].underscore}"

  # puts "#{klass.inspect}.field :#{position_name}" # DEBUG

  klass.field position_name, type: ::Integer, default: 0

  klass.belongs_to rule['name'].to_sym, class_name: rule['class_name']

  if rule['required']
    klass.validates_presence_of rule['name'].to_sym
  end

  klass.before_create do |object|
    position = (object.class.max(position_name.to_sym) || 0) + 1
    object.send(:"#{position_name}=", position)
  end
end