add a note about sessions transcoder, rel: https://github.com/kataras…

…/iris/issues/1517#issuecomment-630256473

Former-commit-id: 3ac995ea77b4629dc7b0d580b9e36d9e302b96ee

_examples/sessions/database/badger/main.go

@@ -24,6 +24,18 @@ func main() {
 
 	defer db.Close() // close and unlock the database if application errored.
 
+	// The default transcoder is the JSON one,
+	// based on the https://golang.org/pkg/encoding/json/#Unmarshal
+	// you can only retrieve numbers as float64 types:
+	// * bool, for booleans
+	// * float64, for numbers
+	// * string, for strings
+	// * []interface{}, for arrays
+	// * map[string]interface{}, for objects.
+	// If you want to save the data per go-specific types
+	// you should change the DefaultTranscoder to the GobTranscoder one:
+	// sessions.DefaultTranscoder = sessions.GobTranscoder{}
+
 	sess := sessions.New(sessions.Config{
 		Cookie:       "sessionscookieid",
 		Expires:      1 * time.Minute, // <=0 means unlimited life. Defaults to 0.

_examples/sessions/overview/example/example.go

@@ -77,9 +77,29 @@ func NewApp(sess *sessions.Sessions) *iris.Application {
 		session := sessions.Get(ctx)
 		// get a specific key, as string, if no found returns just an empty string
 		key := ctx.Params().Get("key")
-		name := session.GetString(key)
+		value := session.Get(key)
 
-		ctx.Writef("The name on the /set was: %s", name)
+		ctx.Writef("The [%s:%T] on the /set was: %v", key, value, value)
+	})
+
+	app.Get("/set/{type}/{key}/{value}", func(ctx iris.Context) {
+		session := sessions.Get(ctx)
+
+		key := ctx.Params().Get("key")
+		var value interface{}
+
+		switch ctx.Params().Get("type") {
+		case "int":
+			value = ctx.Params().GetIntDefault("value", 0)
+		case "float64":
+			value = ctx.Params().GetFloat64Default("value", 0.0)
+		default:
+			value = ctx.Params().Get("value")
+		}
+		session.Set(key, value)
+
+		value = session.Get(key)
+		ctx.Writef("Key: %s, Type: %T, Value: %v", key, value, value)
 	})
 
 	app.Get("/delete", func(ctx iris.Context) {