ArgumentError: comparison of NilClass with 1 failed

[ryaz]

Getting that error when using config[:append] = true Temporary fixed it with next_position = (max_position = sortable_relation.pluck(sortable_position_column)**.map(&:to_i)**.max).present? ? max_position + 1 : 0 in sortable_append_instance method The problem is that sortable_relation returns existion records + new objects with nil in position column which breaks max. Please advise.