cards_or_sources[:total_count] || 0 + 1 -> 

if cards_or_sources[:total_count] == 0
  return 0
else 
  return 0 + 1 # return 1
end

I believe the meaning was:

 if cards_or_sources[:total_count] == 0 || cards_or_sources[:total_count].nil?
 return 1
else
return cards_or_sources[:total_count]  + 1
end