From: Dave Smith <louis.bacon@...>
Date: 2009-06-05T22:44:14+09:00
Subject: hash of hashes group_by

Hi Guys,

I have the following code which grabs some data from the database in my
model

def get_stats
  sql = "select id, value from table"
  my_data = self.class.connection.select_all(sql)
  my_data.group_by { |row| row[:id] }
end

the data is clearly in there as a puts shows

value4id1
value1id2

but when trying to access the values

x = my_data[1][:value]

The error occurred while evaluating nil.[]

Can anyone shed some light on this?

Cheers
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