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Questions tagged [mgo]

mgo (pronounced as mango) is a MongoDB driver for the Go language that implements a rich and well tested selection of features under a very simple API following standard Go idioms.

mgo (pronounced as mango) is a driver for the language that implements a rich and well tested selection of features under a very simple API following standard Go idioms.

Note that the "original" mgo driver (github.com/go-mgo/mgo) developed by Gustavo Niemeyer has gone dark (unmaintained). Even the author himself recommends to use the community supported fork github.com/globalsign/mgo which is in much better shape.

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why variable is nil although I put there reference to object

I cannot figure out why after calling ConnectToMongo variable session is still nil. I would understand it if ConnectToMongo accepts not reference type like ConnectToMongo(session mgo.Session) but reference variable type *mgo.Session must be saved…
Maxim Yefremov
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Go compile error "undefined function"

I have the following pieces of code: Interface & function definition: package helper import "gopkg.in/mgo.v2/bson" // Defines an interface for identifiable objects type Identifiable interface { GetIdentifier() bson.ObjectId } // Checks if a…
Michel
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The most improved way to get all likes for each post in MGO?

Likes have different collection, so do Posts. But, maybe it is more efficient and green that: just getting all posts and when users hover on posts fetching likes or when intersection api is triggered visible on the screen, fetching likes, Should I…
Bitfinicon
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Which library is More Efficient "gopkg.in/mgo.v2" or "go.mongodb.org/mongo-driver/mongo"

I am using Golang as backed language with mongodb database and also new to this language.I have used both libraries "gopkg.in/mgo.v2" and "go.mongodb.org/mongo-driver/mongo" to perform all CRUD oprations. My Question is which one is more efficient…
Rajandeep Kaur
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Implement MongoDB shell in GO

I have data in MongoDB as tree structure model. Here is my data structure: Here is my Mongo shell to create…
ThanhLam112358
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Get a slice of json string from mongo using golang

I am trying to get a slice of json text from mongo using the below code in golang var a []string err := col..Find(nil).Select(bson.M{"_id": 0}).All(&a) I get the error Unsupported document type for unmarshalling: string May I know the right way to…
DoIt
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What's the downside of using global mongo (mgo) database in golang?

Are there any downsides if we use a global variable to handle database operations instead of passing it as an argument to functions and methods or storing it as a field in structs? What are these downsides (if there are)? Let's say we create a…
Ali Padida
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Golang Cannot recover from panic mgo.DialWithInfo

I tried to unit test connection to MongoDB using mgo.DialWithInfo function (in the failure case). mgo.DialWithInfo does not return an error but panics instead. I tried to add recovery logic to recover from the panic without success. My questions…
Gibi
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How to define mongodb Text Indexes in mgo with weights

I'm trying to create text indexes with weights but I couldn't figure out how to do by reading API docs. How can I build indexes as below in mgo. db.products.createIndex({ "primaryCategoryIndexes": "text", "secondaryCategoryIndexes": "text", …
Lupus
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Go command returns not found but works in terminal

I am trying to remove a record from MongoDB using the following line of Go code: mg.collection.Remove(bson.M{"id": 1}) this command returns a not found error but the following piece of codes works without issue in the terminal and…
jim
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Getting error while deleting the key value from array of objects

I am getting the following error while deleting from key from array of JSON objects using Go. Error: repository/orderRepository.go:394:11: first argument to delete must be map; have interface {} repository/orderRepository.go:395:11: first…
user_agent
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JSON tag is ignored when inserting struct/document into mongo (through mgo)

This is what the struct looks like This is what the documents look like in Mongo.
Lukas Süsslin
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How to sum the values of fields?

I have structs like this { "actionName": "add_new_paint_layer", "countUse": 1, "sources": "smth" }, { "actionName": "clear", "countUse": 1, "sources": "smth" }, { "actionName":…
djkah11
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