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No route matches [GET]の原因と解決策

Last updated at Posted at 2019-02-26

###エラー
post/indexのブラウザ上で、postコントローラーのdestroyアクションを実施した結果、以下のエラーが起きた。

image.png

####エラーの該当箇所

<%= link_to("削除", "/posts/#{@post.id}/destroy", {method: "delete"}) %>

###解決策
rake routesでひとまず確認

rake routes
 posts_create POST   /posts/create(.:format)           posts#create
               GET    /posts/:id/edit(.:format)         posts#edit
               POST   /posts/:id/update(.:format)       posts#update
               POST   /posts/:id/destroy(.:format)      posts#destroy

###解決策
routesと、メソッドを変えたら解決した。

####①POSTをDELETEに変更

routesで、POST /posts/:id/destroy(.:format) を、DELETE /posts/:id/destroy(.:format)に変更

参考記事:https://railsguides.jp/routing.html

####②link_toをbutton_toに変更

<%= button_to("削除", "/posts/#{@post.id}/destroy",method: :delete) %>

参考記事:https://qiita.com/y-temp4/items/2d50feb3ff0d65acdf67
###メモ

link_toからbutton_toに変更すると、Viewはこうなった。

image.png

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