blocks|key|2815538|text|尝尝这个,|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2815539|删除Gemfile.lock文件并执行bundle+install，然后是git+add、git+commit和git+push。|offset|length|style|CODE|2815540|entityMap^0|0|2|C|J|E|11|7|19|A|1K|8|0^^$0|@$1|2|3|4|5|6|7|J|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|K|8|@$D|L|E|M|F|G]|$D|N|E|O|F|G]|$D|P|E|Q|F|G]|$D|R|E|S|F|G]|$D|T|E|U|F|G]]|9|@]|A|$]]|$1|H|3|-4|5|6|7|V|8|@]|9|@]|A|$]]]|I|$]]

try this,

remove <code>Gemfile.lock</code> file and do <code>bundle install</code> , then <code>git add</code>, <code>git commit</code> and <code>git push</code> .

blocks|key|3028061|text|看一下Heroku写到控制台的所有输出--您的错误很可能出在某个地方。我遇到了这个问题，发现预编译步骤失败了。也可以在本地运行：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3028062|rake+assets:precompile|code-block|syntax|javascript|3028063|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Look though the all of the output that Heroku writes to the console -- your error is likely to be there somewhere. I ran into this and found that the precompile step had failed. That can be run locally as well:

<pre><code>rake assets:precompile
</code></pre>

blocks|key|2815629|text|Heroku的资产插件不再工作，因为Rails4不支持插件。您需要使用Heroku的资产gem。把这个放到你的Gemfile中：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2815630|group+:production+do
++gem+'rails_12factor'
end|code-block|syntax|javascript|2815631|答案在这里：Heroku+does+NOT+compile+files+under+assets+pipelines+in+Rails+4为我工作|offset|length|2815632|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/questions/15354539/heroku-does-not-compile-files-under-assets-piplines-in-rails-4^0|0|0|6|1R|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|T|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|U|8|@]|9|@$I|V|J|W|1|X]]|A|$]]|$1|K|3|-4|5|6|7|Y|8|@]|9|@]|A|$]]]|L|$M|$5|N|O|P|A|$Q|R]]]]

Heroku's asset plugins no longer work since Rails 4 does not support plugins. You need to use Heroku's asset gems instead. Place this in your Gemfile:

<pre><code>group :production do
 gem 'rails_12factor'
end
</code></pre>

Answer found here: <a href="https://stackoverflow.com/questions/15354539/heroku-does-not-compile-files-under-assets-piplines-in-rails-4">Heroku does NOT compile files under assets pipelines in Rails 4</a> worked for me

blocks|key|194750|text|我的问题是我在.gitignore中忽略了我的bower目录。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|194751|所以我要么需要从我的packages.json安装bower，要么检查我的bower目录。|194752|http://xseignard.github.io/2013/02/18/use-bower-with-heroku/|offset|length|194753|我选择现在就检查我的bower目录，以获得快速解决方案。|194754|entityMap|0|LINK|mutability|MUTABLE|url^0|0|0|0|1O|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|R|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|S|8|@]|9|@$F|T|G|U|1|V]]|A|$]]|$1|H|3|I|5|6|7|W|8|@]|9|@]|A|$]]|$1|J|3|-4|5|6|7|X|8|@]|9|@]|A|$]]]|K|$L|$5|M|N|O|A|$P|E]]]]

My issue was that I had my bower directory ignored in .gitignore.

So I either need to do bower install from my packages.json or check in my bower dir. 

<a href="http://xseignard.github.io/2013/02/18/use-bower-with-heroku/" rel="nofollow">http://xseignard.github.io/2013/02/18/use-bower-with-heroku/</a>

I chose to check in my bower dir for a quick solution right now.

blocks|key|194762|text|虽然这个问题有一个公认的答案，但答案对我没有帮助，我也有同样的问题。下面的内容对我很有效，因此做出了贡献。Heroku不支持sqlite3。在这种情况下，我在我的gemfile中有postgres+gem，你应该将它放在开发组中，并将postgres+gem+(+heroku支持的)放在production组中。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|194763|1)删除gemfile.lock文件(从项目文件夹中)|194764|2)在gem文件中，删除gem+sqlite3或类似的sqlite3+gem|offset|length|style|CODE|194765|3)而不是在文件末尾添加以下内容：|194766|group+:development,+:test+do
++gem+'sqlite3'
end
gem+'pg',+group:+:production`|code-block|syntax|javascript|194767|现在，在终端中运行以下命令：|194768|bundle+install
git+add+.
git+commit
git+push
git+push+heroku+master|194769|虽然这是一个愚蠢的错误，但我花了一段时间才意识到这一点。希望这能帮助到别人。|194770|entityMap^0|0|0|C|B|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Y|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|Z|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|10|8|@$F|11|G|12|H|I]]|9|@]|A|$]]|$1|J|3|K|5|6|7|13|8|@]|9|@]|A|$]]|$1|L|3|M|5|N|7|14|8|@]|9|@]|A|$O|P]]|$1|Q|3|R|5|6|7|15|8|@]|9|@]|A|$]]|$1|S|3|T|5|N|7|16|8|@]|9|@]|A|$O|P]]|$1|U|3|V|5|6|7|17|8|@]|9|@]|A|$]]|$1|W|3|-4|5|6|7|18|8|@]|9|@]|A|$]]]|X|$]]

Although the question has an accepted answer, the answer did not help me,
I had the same problem. The following worked for me, hence contributing. Heroku does not support sqlite 3. In this case, I had sqlite3 gem in my gemfile, which you are supposed to put in development group, and put postgres gem (which heroku supports) in production group.

1) Delete the gemfile.lock file (from your project folder)

2) In the gemfile, remove <code>gem sqlite3</code> or similar sqlite3 gem

3) Instead of that add following to the end of file: 

<pre><code>group :development, :test do
 gem 'sqlite3'
end
gem 'pg', group: :production`
</code></pre>

Now, run the following commands in terminal:

<pre><code>bundle install
git add .
git commit
git push
git push heroku master
</code></pre>

Although it was a silly mistake, It took me time to realize the same. Hope it helps someone.

blocks|key|3028328|text|Heroku不喜欢sqlite3，用gem+'pg'更改gem+'sqlite3'|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|3028329|entityMap^0|I|8|S|D|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]|$9|K|A|L|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|M|8|@]|D|@]|E|$]]]|G|$]]

Heroku does not like sqlite3, change <code>gem 'sqlite3'</code> with <code>gem 'pg'</code>

Having the following issue, BRAND NEW TO RoR, first time ever trying to upload an app to go live, first had hosting issues, then decided if i could fix them with heroku i would just use a custom domain with heroku...... No this isnt a test app "learning rails" thing, actual app i want to deploy for use within the business I own, any help would be great, I have searched and havent seen a solution to this problem.

Make sure 'gem install sqlite3 -v 1.3.7' succeeds before bundling.

<pre><code>Failed to install gems via Bundler

Heroku push rejected, failed to compile Ruby/rails app

To git@heroku.com:peaceful-chamber-6371.git
[remote rejected] master -&gt; master &lt;pre-receive hook declined&gt;
error: failed to push some refs to 'git@heroku.com:peaceful-chamber-6371.git
</code></pre>

Gem File

<pre><code>source 'https://rubygems.org'

gem 'rails', '3.2.12'

# Bundle edge Rails instead:
# gem 'rails', :git =&gt; 'git://github.com/rails/rails.git'
group :development, :test do
gem 'sqlite3'
end
group :production do
 gem 'pg'
end


# Gems used only for assets and not required
# in production environments by default.
group :assets do
 gem 'sass-rails', '~&gt; 3.2.3'
 gem 'coffee-rails', '~&gt; 3.2.1'

 # See https://github.com/sstephenson/execjs#readme for more supported runtimes
 # gem 'therubyracer', :platforms =&gt; :ruby

 gem 'uglifier', '&gt;= 1.0.3'
 gem 'twitter-bootstrap-rails'
end

gem 'jquery-rails'

# To use ActiveModel has_secure_password
# gem 'bcrypt-ruby', '~&gt; 3.0.0'

# To use Jbuilder templates for JSON
# gem 'jbuilder'

# Use unicorn as the app server
# gem 'unicorn'

# Deploy with Capistrano
# gem 'capistrano'

# To use debugger
# gem 'debugger'
</code></pre>

heroku push rejected, failed to compile Ruby/rails app

JSON

有以下问题，全新的RoR，第一次尝试上传应用程序上线，首先有托管问题，然后决定如果我可以用heroku修复它们，我将只使用heroku的自定义域名......不，这不是一个测试应用程序“学习rails”的事情，实际的应用程序，我想部署在我自己的业务中使用，任何帮助都会很好，我已经搜索过了，还没有看到这个问题的解决方案。...

问heroku推送被拒绝，无法编译Ruby/rails应用程序
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