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bobagold/example.js

Last active June 28, 2017 16:00
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how to change type of _id field in an existing mongo collection from ObjectId to String with the same value
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example.js
// assuming the collection name is translations
db.translations.find({_id: {$type: 7}}).forEach((r) => {const n = Object.assign({}, r, {_id: r._id.str}); db.translations.remove(r); db.translations.save(n);})
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