Adding a simple mongo example.

db/examples/mongo.go

+package main
+
+import (
+	"fmt"
+	"github.com/kr/pretty"
+	. "github.com/xiam/gosexy/db"
+)
+
+func main() {
+	db := MongoSession(DataSource{Host: "10.0.0.11", Database: "gotest"})
+
+	err := db.Open()
+	defer db.Close()
+
+	if err != nil {
+		panic(err)
+	}
+
+	col := db.Collection("people")
+
+	result := col.FindAll(
+		Relate{
+			"lives_in": On{
+				db.Collection("places"),
+				Where{"code_id": "{place_code_id}"},
+			},
+		},
+		RelateAll{
+			"has_children": On{
+				db.Collection("children"),
+				Where{"parent_id": "{_id}"},
+			},
+			"has_visited": On{
+				db.Collection("visits"),
+				Where{"person_id": "{_id}"},
+				Relate{
+					"place": On{
+						db.Collection("places"),
+						Where{"_id": "{place_id}"},
+					},
+				},
+			},
+		},
+	)
+
+	fmt.Printf("%# v\n", pretty.Formatter(result))
+}