Created
January 12, 2013 02:28
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if model Foo has_many model Bars how can I find Foos that don't have any Bars at all?
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| Foo.all.each do |f| | |
| if Bar.where(:foo_id => f.id).all.empty? | |
| puts "#{f.id} has no bars!" | |
| end | |
| end | |
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