【rails sできない解決法】rails aborted! Sprockets::Railtie::ManifestNeededError: Expected to find a manifest file

解決策だけ書いたページです。解説しません。

ターミナルにこんな感じのエラーがでた人向けです。

rails aborted!
Sprockets::Railtie::ManifestNeededError: Expected to find a manifest file in `app/assets/config/manifest.js`
But did not, please create this file and use it to link any assets that need
to be rendered by your app:

Example:
  //= link_tree ../images
  //= link_directory ../javascripts .js
  //= link_directory ../stylesheets .css
and restart your server
/Users/okakaori/projects/todo_app/memo_app/config/environment.rb:5:in `<top (required)>'
/Users/okakaori/projects/todo_app/memo_app/bin/rails:9:in `require'
/Users/okakaori/projects/todo_app/memo_app/bin/rails:9:in `<top (required)>'
/Users/okakaori/projects/todo_app/memo_app/bin/spring:13:in `<top (required)>'
bin/rails:3:in `load'
bin/rails:3:in `<main>'
Tasks: TOP => db:create => db:load_config => environment
(See full trace by running task with --trace)
okakaorinoAir:memo_app okakaori$ rake db:creat
rake aborted!
Don't know how to build task 'db:creat' (See the list of available tasks with `rake --tasks`)
Did you mean?  db:create

(See full trace by running task with --trace)

解決法

①不足した「manifest.js」を作る

app/assets/config/manifest.js
上記のフォルダに「manifest.js」を作って入れる。
app/assets/配下に「config」がない場合は自分で作る。

②manifest.jsに不足した記述を書く

①で作ったファイルに下記を記入

manifest.js

  //= link_tree ../images
  //= link_directory ../javascripts .js
  //= link_directory ../stylesheets .css

③rails s

これで見れるはず。
localhost:3000にて「Sprockets::Railtie::ManifestNeededError:」で見れない場合は
①②が原因でそもそもdbが作れてない可能性があるので、
下記のくだりをもう一通りやってみてください。

[例のアレ]
bundle exec rake db:create
　↓
bundle exec rake db:migrate

参考記事

DB作成時の「Sprockets::Railtie::ManifestNeededError:」の解決方法
https://qiita.com/kota-es/items/afdc1fb743408f4a5210