Module: Trax::Model::STI::Attributes::ClassMethods

Defined in:
lib/trax/model/sti/attributes.rb

Instance Method Summary collapse

Instance Method Details

#sti_attribute(*args) ⇒ Object 



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# File 'lib/trax/model/sti/attributes.rb', line 52

def sti_attribute(*args)
  options = args.extract_options!

  args.each do |attribute_name|
    return unless self._attribute_set_class_name.constantize.table_exists?
    raise ::Trax::Model::Errors::STIAttributeNotFound unless self._attribute_set_class_name.constantize.column_names.include?("#{attribute_name}")

    self._sti_attributes << attribute_name

    self.delegate(attribute_name, :to => :attribute_set)
    self.delegate("#{attribute_name}=", :to => :attribute_set) unless options.key?(:writer) && options[:writer] == false
  end
end

#validates_uniqueness_of!(*args) ⇒ Object 



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# File 'lib/trax/model/sti/attributes.rb', line 66

def validates_uniqueness_of!(*args)
  options = args.extract_options!

  args.each do |arg|
    validation_method_name = :"validate_#{arg.to_s}"

    self.send(:define_method, :"validate_#{arg.to_s}") do |*_args|
      where_scope_hash = {}
      field_value = self.__send__(arg)
      where_scope_hash[arg] = field_value

      where_scope = self._attribute_set_class_name.constantize.where(where_scope_hash).all

      options[:scope].each do |field|
        scoped_field_value = self.__send__(field)
        where_scope.merge(self.class.where({field => scoped_field_value}))
      end if options.has_key?(:scope)

      errors.add(arg, "has already been taken") if where_scope.limit(1).any?
    end

    self.validate(validation_method_name)
  end
end