Can I use MongoDB and a PostgreSQL in one rails app? Specifically I will eventually want to use something like MongoHQ. So far I have failed to get this working in experimentation. And it concerns me that the MongoDB documentation specifically says I have to disable ActiveRecord. Any advice would be appreciated.Can I use MongoDB and a PostgreSQL in one rails
阅读背景：
在一个Rails应用程序中使用PostgreSQL的MongoDB
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