Herokuにデプロイ後、AppricationErrorが発生してしまう。

Question

前提・実現したいこと

RailsTutorialで、herokuにデプロイ後、heroku openを実行して画面を確認したいのですが、
Application error
An error occurred in the application and your page could not be served. If you are the application owner, check your logs for details.
という画面表示されてしまいます。

###エラー内容
heroku run rails c　で、エラーメッセージを確認したところ、次のようなログが出てきました。

/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require': cannot load such file -- bundler (LoadError)
	from /usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'
	from /app/bin/spring:8:in `<top (required)>'
	from /app/bin/rails:3:in `load'
	from /app/bin/rails:3:in `<main>'

色々調べてみるとbundlerのバージョンが違うと書いてあり、いろんなバージョンで試してみたのですが、ダメでした。
現在のバージョン　→　Bundler version 1.16.2

ローカル環境ではちゃんと動くのですが、本番環境になると、うまくいきません。
何が原因なのでしょうか？

よろしくお願いいたします????‍♂️

###開発環境
・heroku
・Ruby 2.5.1
・Rails 5.1.4

##追記
herokuで初めてデプロイした時から、上記のエラーが発生しておりました。
それ以来、git push heroku を実行しておりますが、同じようなエラーが発生しております。

hroku logsの結果は以下のようになります????‍♂️

2018-06-17T10:08:02.885286+00:00 heroku[web.1]: State changed from crashed to starting
2018-06-17T10:08:04.601622+00:00 heroku[web.1]: Starting process with command `npm start`
2018-06-17T10:08:06.680310+00:00 app[web.1]: npm ERR! missing script: start
2018-06-17T10:08:06.686084+00:00 app[web.1]: 
2018-06-17T10:08:06.686398+00:00 app[web.1]: npm ERR! A complete log of this run can be found in:
2018-06-17T10:08:06.686510+00:00 app[web.1]: npm ERR!     /app/.npm/_logs/2018-06-17T10_08_06_681Z-debug.log
2018-06-17T10:08:06.765355+00:00 heroku[web.1]: State changed from starting to crashed
2018-06-17T10:08:06.742437+00:00 heroku[web.1]: Process exited with status 1
2018-06-17T15:36:32.754158+00:00 heroku[web.1]: State changed from crashed to starting
2018-06-17T15:36:34.786785+00:00 heroku[web.1]: Starting process with command `npm start`
2018-06-17T15:36:37.478385+00:00 heroku[web.1]: Process exited with status 1
2018-06-17T15:36:37.507581+00:00 heroku[web.1]: State changed from starting to crashed
2018-06-17T15:36:37.386087+00:00 app[web.1]: npm ERR! missing script: start
2018-06-17T15:36:37.393485+00:00 app[web.1]: 
2018-06-17T15:36:37.393725+00:00 app[web.1]: npm ERR! A complete log of this run can be found in:
2018-06-17T15:36:37.393858+00:00 app[web.1]: npm ERR!     /app/.npm/_logs/2018-06-17T15_36_37_387Z-debug.log
2018-06-17T21:20:48.316996+00:00 heroku[web.1]: State changed from crashed to starting
2018-06-17T21:20:50.195702+00:00 heroku[web.1]: Starting process with command `npm start`
2018-06-17T21:20:52.687722+00:00 heroku[web.1]: State changed from starting to crashed
2018-06-17T21:20:52.652699+00:00 heroku[web.1]: Process exited with status 1
2018-06-17T21:20:52.579329+00:00 app[web.1]: npm ERR! missing script: start
2018-06-17T21:20:52.586247+00:00 app[web.1]: 
2018-06-17T21:20:52.586310+00:00 app[web.1]: npm ERR! A complete log of this run can be found in:
2018-06-17T21:20:52.586424+00:00 app[web.1]: npm ERR!     /app/.npm/_logs/2018-06-17T21_20_52_580Z-debug.log
2018-06-18T03:05:08.775816+00:00 heroku[web.1]: State changed from crashed to starting
2018-06-18T03:05:10.637040+00:00 heroku[web.1]: Starting process with command `npm start`
2018-06-18T03:05:12.886575+00:00 heroku[web.1]: Process exited with status 1
2018-06-18T03:05:12.913687+00:00 heroku[web.1]: State changed from starting to crashed
2018-06-18T03:05:12.825487+00:00 app[web.1]: npm ERR! missing script: start
2018-06-18T03:05:12.830823+00:00 app[web.1]: 
2018-06-18T03:05:12.831023+00:00 app[web.1]: npm ERR! A complete log of this run can be found in:
2018-06-18T03:05:12.831130+00:00 app[web.1]: npm ERR!     /app/.npm/_logs/2018-06-18T03_05_12_826Z-debug.log
2018-06-18T08:57:27.598935+00:00 heroku[web.1]: State changed from crashed to starting
2018-06-18T08:57:29.208833+00:00 heroku[web.1]: Starting process with command `npm start`
2018-06-18T08:57:31.105768+00:00 app[web.1]: npm ERR! missing script: start
2018-06-18T08:57:31.111388+00:00 app[web.1]: 
2018-06-18T08:57:31.111594+00:00 app[web.1]: npm ERR! A complete log of this run can be found in:
2018-06-18T08:57:31.111665+00:00 app[web.1]: npm ERR!     /app/.npm/_logs/2018-06-18T08_57_31_107Z-debug.log
2018-06-18T08:57:31.187516+00:00 heroku[web.1]: State changed from starting to crashed
2018-06-18T08:57:31.169741+00:00 heroku[web.1]: Process exited with status 1
2018-06-18T15:05:48.190915+00:00 heroku[web.1]: State changed from crashed to starting
2018-06-18T15:05:50.722944+00:00 heroku[web.1]: Starting process with command `npm start`
2018-06-18T15:05:54.458325+00:00 heroku[web.1]: Process exited with status 1
2018-06-18T15:05:54.508569+00:00 heroku[web.1]: State changed from starting to crashed
2018-06-18T15:05:54.359456+00:00 app[web.1]: npm ERR! missing script: start
2018-06-18T15:05:54.382228+00:00 app[web.1]: 
2018-06-18T15:05:54.390096+00:00 app[web.1]: npm ERR! A complete log of this run can be found in:
2018-06-18T15:05:54.390312+00:00 app[web.1]: npm ERR!     /app/.npm/_logs/2018-06-18T15_05_54_373Z-debug.log
2018-06-18T21:09:16.503082+00:00 heroku[web.1]: State changed from crashed to starting
2018-06-18T21:09:18.257452+00:00 heroku[web.1]: Starting process with command `npm start`
2018-06-18T21:09:20.441757+00:00 heroku[web.1]: State changed from starting to crashed
2018-06-18T21:09:20.359245+00:00 app[web.1]: npm ERR! missing script: start
2018-06-18T21:09:20.364977+00:00 app[web.1]: 
2018-06-18T21:09:20.365150+00:00 app[web.1]: npm ERR! A complete log of this run can be found in:
2018-06-18T21:09:20.365235+00:00 app[web.1]: npm ERR!     /app/.npm/_logs/2018-06-18T21_09_20_360Z-debug.log
2018-06-18T21:09:20.427914+00:00 heroku[web.1]: Process exited with status 1
2018-06-19T02:53:39.141015+00:00 heroku[web.1]: State changed from crashed to starting
2018-06-19T02:53:40.765653+00:00 heroku[web.1]: Starting process with command `npm start`
2018-06-19T02:53:42.559104+00:00 app[web.1]: npm ERR! missing script: start
2018-06-19T02:53:42.568308+00:00 app[web.1]: 
2018-06-19T02:53:42.568507+00:00 app[web.1]: npm ERR! A complete log of this run can be found in:
2018-06-19T02:53:42.568589+00:00 app[web.1]: npm ERR!     /app/.npm/_logs/2018-06-19T02_53_42_561Z-debug.log
2018-06-19T02:53:42.646686+00:00 heroku[web.1]: State changed from starting to crashed
2018-06-19T02:53:42.619570+00:00 heroku[web.1]: Process exited with status 1
2018-06-19T08:38:02.778029+00:00 heroku[web.1]: State changed from crashed to starting
2018-06-19T08:38:07.004789+00:00 heroku[web.1]: Starting process with command `npm start`
2018-06-19T08:38:10.488636+00:00 heroku[web.1]: State changed from starting to crashed
2018-06-19T08:38:10.470072+00:00 heroku[web.1]: Process exited with status 1
2018-06-19T08:38:10.330360+00:00 app[web.1]: npm ERR! missing script: start
2018-06-19T08:38:10.362553+00:00 app[web.1]: 
2018-06-19T08:38:10.366206+00:00 app[web.1]: npm ERR! A complete log of this run can be found in:
2018-06-19T08:38:10.367256+00:00 app[web.1]: npm ERR!     /app/.npm/_logs/2018-06-19T08_38_10_338Z-debug.log
2018-06-19T12:52:45.000000+00:00 app[api]: Build started by user [e-mail]
2018-06-19T12:52:53.974159+00:00 app[api]: Deploy 9b9d8608 by user [e-mail]
2018-06-19T12:52:53.974159+00:00 app[api]: Release v5 created by user [e-mail]
2018-06-19T12:52:54.000000+00:00 app[api]: Build succeeded
2018-06-19T12:52:54.654763+00:00 heroku[web.1]: State changed from crashed to starting
2018-06-19T12:52:56.265080+00:00 heroku[web.1]: Starting process with command `npm start`
2018-06-19T12:52:58.181451+00:00 app[web.1]: npm ERR! missing script: start
2018-06-19T12:52:58.187326+00:00 app[web.1]: 
2018-06-19T12:52:58.187483+00:00 app[web.1]: npm ERR! A complete log of this run can be found in:
2018-06-19T12:52:58.187575+00:00 app[web.1]: npm ERR!     /app/.npm/_logs/2018-06-19T12_52_58_182Z-debug.log
2018-06-19T12:52:58.351754+00:00 heroku[web.1]: State changed from starting to crashed
2018-06-19T12:52:58.354363+00:00 heroku[web.1]: State changed from crashed to starting
2018-06-19T12:52:58.227330+00:00 heroku[web.1]: Process exited with status 1
2018-06-19T12:53:00.503935+00:00 heroku[web.1]: Starting process with command `npm start`
2018-06-19T12:53:02.889472+00:00 app[web.1]: npm ERR! missing script: start
2018-06-19T12:53:02.903068+00:00 app[web.1]: 
2018-06-19T12:53:02.903332+00:00 app[web.1]: npm ERR! A complete log of this run can be found in:
2018-06-19T12:53:02.903462+00:00 app[web.1]: npm ERR!     /app/.npm/_logs/2018-06-19T12_53_02_890Z-debug.log
2018-06-19T12:53:02.963573+00:00 heroku[web.1]: Process exited with status 1
2018-06-19T12:53:03.175447+00:00 heroku[web.1]: State changed from starting to crashed
2018-06-19T12:53:03.900541+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/" host=murmuring-falls-47215.herokuapp.com request_id=6d106165-9a07-47ab-ae7f-1a09abe110ae fwd="39.110.216.71" dyno= connect= service= status=503 bytes= protocol=https
2018-06-19T12:53:04.527828+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/favicon.ico" host=murmuring-falls-47215.herokuapp.com request_id=4d0b9f2e-c0c2-4584-bbc0-e748c8bfa4db fwd="39.110.216.71" dyno= connect= service= status=503 bytes= protocol=https
2018-06-19T12:53:14.674464+00:00 app[api]: Starting process with command `rails c` by user [e-mail]
2018-06-19T12:53:16.977353+00:00 heroku[run.4339]: Awaiting client
2018-06-19T12:53:17.024568+00:00 heroku[run.4339]: Starting process with command `rails c`
2018-06-19T12:53:17.129170+00:00 heroku[run.4339]: State changed from starting to up
2018-06-19T12:53:21.594186+00:00 heroku[run.4339]: State changed from up to complete
2018-06-19T12:53:21.580562+00:00 heroku[run.4339]: Process exited with status 1

Comments

[退会済みユーザー]

①herokuに初めてデプロイしてエラーが出た or 今まで動いていたが今回のデプロイでエラーが出た のどちらでしょう？②heroku logs コマンドの出力結果を質問文に追記お願いします。

[ngron1210]

herokuに初めてデプロイしてエラーが出ました！ 何度かpushしましたが、動いたことは一度もありません。heroku logsの追記もしましたので、お時間あるときに回答いただけると嬉しいです！

Answer 1

本番環境ではgem 'sqlite3'ではなくgem 'pg'が使われていますか？

rubyのビルドパックがないからですかね？
確認して、なければ以下のコマンドで解決するかも...
$ heroku buildpacks:set heroku/ruby
$ git push heroku master -f

Comments

[ngron1210]

はい、 `gam pg`が使われております。

```
source 'https://rubygems.org'
2
3 gem 'rails', '5.1.4'
4 gem "bcrypt", '3.1.11'
5 gem 'bootstrap-sass', '3.3.7'
6 gem 'puma', '3.9.1'
7 gem 'sass-rails', '5.0.6'
8 gem 'uglifier', '3.2.0'
9 gem 'coffee-rails', '4.2.2'
10 gem 'jquery-rails', '4.3.1'
11 gem 'turbolinks', '5.0.1'
12 gem 'jbuilder', '2.7.0'
13
14 group :development, :test do
15 gem 'sqlite3', '1.3.13'
16 gem 'byebug', '9.0.6', platform: :mri
17 end
18
19 group :development do
20 gem 'web-console', '3.5.1'
21 gem 'listen', '3.1.5'
22 gem 'spring', '2.0.2'
23 gem 'spring-watcher-listen', '2.0.1'
24 end
25
26 group :test do
27 gem 'rails-controller-testing', '1.0.2'
28 gem 'minitest-reporters', '1.1.14'
29 gem 'guard', '2.13.0'
30 gem 'guard-minitest', '2.4.4'
31 end
32
33 group :production do
34 gem 'pg', '0.20.0'
35 end
```

[退会済みユーザー]

Procfileはありますか？なければProcfileを作成してみるか、`package.json`にstartスクリプトを入れてみて下さい。