Created
March 23, 2012 21:16
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modelos do activerecord atuam como adjacentes
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| def previous | |
| Arquivo.where('arquivos.ordem < ?', self.ordem).order('ordem ASC').last | |
| end | |
| def next | |
| Arquivo.where('arquivos.ordem > ?', self.ordem).order('ordem ASC').first | |
| end |
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