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Hi, I'm trying to plot time-series data where each sample breaks down the percentage of CPU time spent in each of four states (usr, nice, sys, idle) 19:08:15 %usr %nice %sys %idle 19:08:16 5 0 10 86 19:08:17 17 0 14 69 19:08:18 5 0 8 87 19:08:19 10 0 10 81 19:08:20 3 0 7 90 19:08:21 4 0 8

Hello! I''m looking for assistance EXTENDING an example from the Agile Web Development With Rails book: Composing Data with Aggregation (page 324). I''m trying to map three columns to a single Ruby object. However, unlike the example in the Agile Web Development book, the three columns I want to map into one object come from THREE DIFFERENT models. I want to map the following

...= above is the code in my view, in my group model i defined :type as null => false when i click on the create button a get an error, Validation failed Type cant be blank. Is there anything wrong the way I created my radio-buttons ? Because I assume they do not assign the value to :type Thanx, Demetris