回答編集履歴
1
コメントへの回答
test
CHANGED
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@@ -67,3 +67,55 @@
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67
67
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@books = Book.order(params[:order])
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68
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69
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```
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70
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## 追記
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74
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order_by がハッシュを返すようにします。
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params[:order] が配列 ASC に含まれるとき { params[:order] => :asc }
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DESC に含まれるとき { params[:order] => :desc }
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含まれない時(リーロードしたとき) { id: :asc} を返します
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84
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85
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87
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```ruby
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def index
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@books = Book.order(order_by)
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end
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ASC = ["evaluation"]
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DESC = ["updated_at", "created_at"]
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def order_by
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if ASC.include?(params[:order])
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{ params[:order] => :asc }
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elsif DESC.include?(params[:order])
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{ params[:order] => :desc }
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else
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{ id: :asc }
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end
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end
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```
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