git相关
报错：fatal: 'heroku' does not appear to be a git repository需要：
git remote add diancai [email protected]:diancai.git解决
git push diancai master这一句如果执行没反应，需要看http://devcenter.heroku.com/articles/git-repository-ssh-fingerprints
by adding the following lines to your ~/.ssh/config
Host heroku.com
VerifyHostKeyDNS yes
$ git remote add diancai [email protected]:diancai.git
$ git push diancai master
$ git push -f diancai master可以强制提交代码或者git push diancai +master
$ git clone -o diancai [email protected]:diancai.git 克隆服务器的代码-o 是给下载后的文件夹取名叫diancai.所以heroku可以用于代码备份，^_^
heroku open
heroku db:migrate报错：主要是pg没装，heroku要求有pg，本地倒是不许要，所以在Gemfile中：
group :production do
# gems specifically for Heroku go here
gem "pg"
end
然后$bundle install --without production
现在git add .
commit push上去OK啦。
如果有错误，查看错误：$heroku logs
rails3.1发布到heroku需要asset pipline，而开发模式下并没有compose，所以发布到heroku的production需要改下config/environments/production.rb里config.assets.compile = true
heroku数据库
默认用Postgresql数据库，new App会自动分配一个shared database,无法使用hero pg:psql连接。Dedicated Database无限制。
如果出现
$ heroku logs No app specified. Run this command from an app folder or specify which app to use with --app错误，可能是因为在另外一个目录，不是最初的目录，因此git push也必须要-f才能提交成功。将最初目录文件清空，将最新文件拷贝到最初的目录，然后将最初的目录改名，就可以正常使用了。
$ git push diancai master To [email protected]:diancai.git ! [rejected] master -> master (non-fast-forward) error: failed to push some refs to '[email protected]:diancai.git' To prevent you from losing history, non-fast-forward updates were rejected Merge the remote changes (e.g. 'git pull') before pushing again. See the 'Note about fast-forwards' section of 'git push --help' for details.出现这样的错误我也只能是通过强制提交解决了。即$ git push diancai +master
绑定域名
http://devcenter.heroku.com/articles/custom-domains
需要绑定信用卡了。
参考文章：http://stackoverflow.com/questions/922210/unable-to-git-push-master-to-github
http://stackoverflow.com/questions/7296683/rails-3-1-pushing-to-heroku-errors-installing-postgres-adapter
http://stackoverflow.com/questions/4574176/heroku-push-rejected-failed-to-install-gems-via-bundler