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liwh/gist:563328

Created September 3, 2010 02:50
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1.验证字段的时候，如果允许为空值得加上:allow_nil => true,如：


 :validates_length_of :content,:maxinum => 200

 #直接用modelname.create(:content=> nil)会出错，得加上:allow_nil => true

2.fixtures里面，如果某字段值设置为ture,在mysql 里显示的是1

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