mongodb - Retrieving document from collection by id -

my object have in collection:

type room struct {     id bson.objectid            `json:"id"                  bson:"_id"`     name string                 `json:"name"                bson:"name"` } 

inserting collection:

room = &room{id: bson.newobjectid(), name: "test"} roomcollection.insert(room) 

retrieving collection (any):

roomx := &room{} if err := roomcollection.find(bson.m{}).one(roomx); err != nil {     panic(err) } fmt.printf("roomx %s:\n%+v\n\n", roomx.id, roomx) 

this outputs:

roomx objectidhex("52024f457a7ea6334d000001"): &{id:objectidhex("52024f457a7ea6334d000001") name:test} 

retrieving collection (by id):

roomz := &room{} if err := roomcollection.find(bson.m{"_id": room.id}).one(roomz); err != nil {     panic(err) // throws "not found" } 

this throws "not found" , can't figure out why.

the different key-value tags field should, according reflect package, separated space.

by convention, tag strings concatenation of optionally space-separated key:"value" pairs. each key non-empty string consisting of non-control characters other space (u+0020 ' '), quote (u+0022 '"'), , colon (u+003a ':'). each value quoted using u+0022 '"' characters , go string literal syntax.

the mgopackage fails read tag , stores id value id instead of _id.