mongoschema

mongoschema is a tool that runs over a Collection in a Mongo DB, and generates a struct with appropriate types and bson tags.

go get github.com/facebookgo/mongoschema

For example, lets make a collection with some data:

# mongo
MongoDB shell version: 2.4.8
connecting to: test
> db.company.insert({name:"Facebook", address:{street_1:"1 Hacker Way", city:"Menlo Park"}, jobs_url:"https://www.facebook.com/careers"})
> db.company.insert({name:"Parse", address:{street_1:"1 Hacker Way", city:"Menlo Park"}, jobs_url:"https://parse.com/jobs"})
> 
bye

And now we can run our tool against this collection:

# mongoschema -url=localhost -db=test -collection=company -package=main -struct=Company
package main

type Company struct {
  ID      bson.ObjectId `bson:"_id,omitempty"`
  Name    string        `bson:"name,omitempty"`
  Address struct {
    Street1 string `bson:"street_1,omitempty"`
    City    string `bson:"city,omitempty"`
  } `bson:"address,omitempty"`
  JobsURL string `bson:"jobs_url,omitempty"`
}