douxu2467
douxu2467
2019-03-08 23:51

golang mongodb将数据库库mongo迁移到mgo

已采纳

I want to change library for database from github.com/mongodb/mongo-go-driver/mongo to github.com/globalsign/mgo, my problem is I dont know how convert this code for new library :

import "github.com/mongodb/mongo-go-driver/mongo/options"
res, err := s.totals().UpdateOne(ctx,
        bson.M{"contract_id": cID, "date": date},
        bson.M{"$inc": bson.M{"value": value}},
        options.Update().SetUpsert(true),
    )

My current code :

collection := s.totals()
err := collection.Update(
    bson.M{"contract_id": contractID, "date": date},
    bson.M{"$inc": bson.M{"value": value}},
    //options.Update().SetUpsert(true),
)

How i can convert this options.Update().SetUpsert(true) for use in new library ?

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1条回答

  • douhuan1908 douhuan1908 2年前

    Simply use the Collection.Upsert() method instead of Collection.Update():

    info, err := collection.Upsert(
        bson.M{"contract_id": contractID, "date": date},
        bson.M{"$inc": bson.M{"value": value}},
    )
    

    Quoting from the doc of Collection.Upsert():

    Upsert finds a single document matching the provided selector document and modifies it according to the update document. If no document matching the selector is found, the update document is applied to the selector document and the result is inserted in the collection.

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