Rails 4:将数据库导出到 YAML [英] Rails 4: Export database to YAML

问题描述

使用 Rails 2/3，可以使用几个插件之一轻松地将数据库导出(转储)到 YAML(请参阅 将数据库表导出到 YAML 文件的最佳方式?).

With Rails 2/3 it was possible and easy to export (dump) a database to YAML using one of a few plugins (see Best way to export a database table to a YAML file?).

但是，这些插件似乎都不兼容 Rails 4.还有一种简单的方法可以做到这一点吗?

However, none of these plugins seem to be compatible with Rails 4. Is there still an easy way to do this?

推荐答案

问题中链接的帖子中指出的方法仍然有效，但代码不再是插件:它是 yaml_db gem.

The method indicated in the post linked in the question is still valid, but the code is not anymore a plugin: it's the yaml_db gem.

存储库位于 https://github.com/yamldb/yaml_db

要转储数据库，请将 gem 添加到 Gemfile，发出

To dump the db, add the gem to the Gemfile, issue

bundle update 

然后发出:

rake db:data:dump

转储文件是:

db/data.yml

如果你像我一样遇到错误

If, like me, you hit the error

undefined method `[]=' for #<ActiveRecord::Result:0x007ff34c76d508>

可以按照此票中的说明进行修复:

it can be fixed by following the instructions given in this ticket:

https://github.com/ludicast/yaml_db/pull/45

你应该做的就是添加

gem 'yaml_db', github: 'jetthoughts/yaml_db', ref: 'fb4b6bd7e12de3cffa93e0a298a1e5253d7e92ba'

到 Gemfile

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