Some strange behevier in Full Text Search command

[Kamoliddin Mavlonov]

Hi guys,

The function bellow doesn't run stable.

func GetSearch(w http.ResponseWriter, r *http.Request) {
	session, err := mgo.Dial(conf.Mongodb)
	if err != nil {
		log.Fatal("Unable to connect to DB ", err)
	}
	defer session.Close()
	session.SetMode(mgo.Monotonic, true) // Optional. Switch the session to a monotonic behavior.

	db := session.DB("sa")
	var result interface{}
	// err = db.Run(bson.M{"text": "ad", "search": "hsjsjd"}, &result)
	err = db.Run(bson.M{"text": "ad", "search": "hsjsjd", "limit": 1}, &result)
	fmt.Printf("err = %s\n", err)

	if err != nil {
		w.Write(json.Message("ERROR", "Ads not found"))
	} else {
		w.Write(json.Message("OK", result))
	}
}

sometimes, it gives error:

err = no such cmd: limit

err = no such cmd: search

Is it something I am missing?

Regards,

Kamol

[Kamoliddin Mavlonov]

Ok, I have figured it out from Gustavo comments and Mgo doc.

func GetSearch(w http.ResponseWriter, r *http.Request) {

session, err := mgo.Dial(conf.Mongodb)

if err != nil {

log.Fatal("Unable to connect to DB ", err)

}

defer session.Close()

session.SetMode(mgo.Monotonic, true) // Optional. Switch the session to a monotonic behavior.

db := session.DB("sa")

var result interface{}

//db.ad.runCommand("text", { search: "hsjsjd", limit: 20, project: { "price" : 1, "image1": 1 }})

q := bson.D{

{"text", "ad"},

{"search", "hsjsjd"},

{"limit", 2},

{"project",

bson.D{

{"price", 1},

{"image1", 1},

},

},

}

err = db.Run(q, &result)

log.Printf("err = %s\n", err)

[Gustavo Niemeyer]

For the record, as discusssed in the other thread, the instability
comes from running the command with a map. MongoDB expects the command
name field to be the first one, and maps do not provide that
guarantee. Instead, use bson.D.

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gustavo @ http://niemeyer.net