Activerecord(mysql) and hash to unique count

Rails
1

I am working with ruby(activerecord) and want to save a ‘hash’ of URLs
such that a key is the URL and the value points to a count of how many
times it occurs after processing a csv file
my question; all I know of is right now is to attempt to save, get a
unique error and then when handling the exception increment the hash
value (really a column in a table)

Is this bad? Or are there better ways?

begin
word = NumbersWord.new
word.word = w.strip
word.source = url_source
word.save
rescue

  puts "ERR: Could not save system word (possible unique error)"
  # Potentially, we need to update the record
  found = NumbersWord.find(:first, :conditions => [ "word = ?", w ],

:limit => 1)
if found
found.occurrence = found.occurrence + 1
found.save
end

  # End of Exception

end

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