mgo

We want our Go application to listen to the data changes on a collection. So, googling in search for a solution, we came across MongoDB's Change Streams . That link also exhibits some implementation snippets for a bunch of languages such as Python, Java, Nodejs etc. Yet, there is no piece of code for Go. We are using Mgo as a driver but could not find explicit statements on change streams . Does anyone have any idea on how to watch on Change Streams using that Mgo or any other Mongo driver for Go? The popular mgo driver ( github.com/go-mgo/mgo ) developed by Gustavo Niemeyer has gone dark

I want to let MongoDB dynamically assign a value to one of the fields of the document I'm inserting. For example: the current time from MongoDB server just like NOW() would do in MySQL. I tried this: c := mongoSession.DB("myapp").C("instances") rand.Seed(time.Now().UnixNano()) err := c.Insert( struct{Serial, Priority, Url, LastSeen interface{}}{ Url: getInformedHost() + ":" + getRunningPortString(), Priority: rand.Int(), LastSeen: mongoNow() } ) checkError(err, "Could not register on MongoDB server.", 3) I have this helper function: func mongoNow() bson.JavaScript { return bson.JavaScript{Code

Hi I have a collection named "my_sales" having fields product_name, price, sale_date. My doc looks like { "_id" : ObjectId("5458b6ee09d76eb7326df3a4"), "product_name" : product1, "price" : 200, "sale_date" : ISODate("2014-11-04T11:22:19.589Z") } { "_id" : ObjectId("5458b6ee09d76eb7326df3a4"), "product_name" : product1, "price" : 200, "sale_date" : ISODate("2014-11-04T11:22:19.589Z") } { "_id" : ObjectId("5458b6ee09d76eb7326df3a4"), "product_name" : product1, "price" : 200, "sale_date" : ISODate("2014-11-04T11:22:19.589Z") } { "_id" : ObjectId("5458b6ee09d76eb7326df3a4"), "product_name" :

I've searched and found no Go solution to the problem, not with or without using mgo.v2 , not on StackOverflow and not on any other site. This Q&A is in the spirit of knowledge sharing / documenting . Let's say we have a users collection in MongoDB modeled with this Go struct : type User struct { ID bson.ObjectId `bson:"_id"` Name string `bson:"name"` Country string `bson:"country"` } We want to sort and list users based on some criteria, but have paging implemented due to the expected long result list. To achieve paging of the results of some query, MongoDB and the mgo.v2 driver package has

I'm VERY new to Go. From what I've seen in the examples of mGo, in order to query a collection and then read from it, you have to predefine the data that will be coming back in a struct. type Person struct { ID bson.ObjectId `bson:"_id,omitempty"` Name string Phone string Timestamp time.Time } In PHP, the document was assigned to an array. This was perfect as one record may have completely different set of keys (may not contain Name or Phone but contain Email) and I could access it directly without setting up a predefined class / struct / variable. Is there a way to do the same in Go / mGo?