Recent questions tagged Mongoid

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mongoid - Moped::Errors::ConnectionFailure Could not connect to any secondary or primary nodes for replica set

I had to forcefully shutdown my Ubuntu system after it got hanged. Now I get this error while trying to run my ... 1.4. What could be wrong? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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mongoid - Creating short, unique object id's in MongoDB

I'm making an app similar to instagram using Rails/Mongoid. I want a unique ID that I can use in a ... the default BSON ObjectID Mongo creates? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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mongoid - MongoDB Aggregation: Compute Running Totals from sum of previous rows

Sample Documents: { _id: ObjectId('4f442120eb03305789000000'), time: ISODate("2013-10-10T20:55:36Z"), value: ... with the MongoDB Aggregation? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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mongoid - Difference between "id" and "_id" fields in MongoDB

Is there any difference between using the field ID or _ID from a MongoDB document? I am asking this, because I ... out the docs were wrong. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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