Tag Archives: mongoid

[mongoid] adding timestamps to an existing mongo collection

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In our Rails 3 application we use mongo to store logging of critical actions. At first we did not store a separate timestamp, since the _id (which is a BSON::ObjectId contains a timestamp as well. Our model, simplified, looked like this: This is all fine and dandy, but when we wanted to build some reporting, [...]

By nathanvda | Posted in Technology | Also tagged , | Comments (0)

[mongoid] doing a group-by on date

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Doing a simple group-by query using mongo and mongoid is actually pretty straightforward. According to the documentation, mongoid does not offer any group/aggregation function itself, but mongo does. And you can directly access the mongo using the collection. So assume we have a mongo collection: and now I want to count all occurrences of the [...]

By nathanvda | Posted in News | Also tagged , | Comments (0)