groovy - kadosyii @ TIPS

エラー

GrailsTagException: Tag [if] must have one or both of the attributes [test] or [env]

【参考】http://grails.1312388.n4.nabble.com/GrailsTagException-Tag-if-must-have-one-or-both-of-the-attributes-test-or-env-td4351116.html