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Editorial Team
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Asked: 2026-05-28T17:29:47+00:00

I am developing a facebook application in Ruby on Rails using MongoDB as database.

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I am developing a facebook application in Ruby on Rails using MongoDB as database.

This application is for bookmarking facebook links.

Now I am facing a problem with MongoDB. Due to its “fire and forget” property, I am getting lot of duplicate URLs. I am unable to check whether the data is inserted or not. When we insert records continuosly i am unable to check whether the data exist or not to avoid duplication. Before the insertion of URL, it is unable to check whether the URL already exists.

I am using MongoMapper and Rails

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1 Answer

  1. Editorial Team

    If you want to verify that data was inserted, you can use the :safe option, as such:

    foo.save(safe: true)

    See http://mongomapper.com/documentation/plugins/safe.html

    I’m not sure if this waits for the write to propagate to all cluster nodes. MongoDB supports this as well, but I’m not sure if Mongomapper does.

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