質問編集履歴
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@@ -17,7 +17,8 @@
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def validate_uniqueness
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#self.tags間でのユニークのバリデーション
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+
errors[:base] << "タグが重複しています"
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-
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unless self.tags.pluck(:name).uniq.size == self.tags.count
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end
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end
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```
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