fix: UnmarshalJSON of dst not called when gjson.Scan gogf#3769

Author: wlynxg

encoding/gjson/gjson_z_unit_test.go

@@ -7,7 +7,9 @@
 package gjson_test
 
 import (
+	"encoding/json"
 	"fmt"
+	"log"
 	"testing"
 
 	"github.com/gogf/gf/v2/container/gmap"
@@ -615,3 +617,30 @@ func Test_Issue2520(t *testing.T) {
 		t.Assert(gjson.MustEncodeString(t2), gjson.New(t2).MustToJsonString())
 	})
 }
+
+type UserIssue3769 struct {
+	Id string
+}
+
+func (u *UserIssue3769) UnmarshalJSON(data []byte) error {
+	var um map[string]string
+	err := json.Unmarshal(data, &um)
+	if err != nil {
+		return err
+	}
+
+	if v, ok := um["uid"]; ok {
+		u.Id = v
+	}
+	return nil
+}
+
+func TestIssue(t *testing.T) {
+	gtest.C(t, func(t *gtest.T) {
+		data := `{"uid": "123", "uname": "456"}`
+		var u UserIssue3769
+		t.AssertNil(gjson.New(data).Scan(&u))
+		log.Println(u)
+		t.Assert(u.Id, `123`)
+	})
+}

util/gconv/gconv_scan.go

@@ -7,6 +7,7 @@
 package gconv
 
 import (
+	stdjson "encoding/json"
 	"reflect"
 
 	"github.com/gogf/gf/v2/errors/gcode"
@@ -197,6 +198,20 @@ func doConvertWithJsonCheck(srcValue interface{}, dstPointer interface{}) (ok bo
 		}
 
 	default:
+		switch dst := dstPointer.(type) {
+		case stdjson.Unmarshaler:
+			bytes, err := json.Marshal(srcValue)
+			if err != nil {
+				return false, err
+			}
+
+			err = dst.UnmarshalJSON(bytes)
+			if err != nil {
+				return false, err
+			}
+			return true, nil
+		}
+
 		// The `params` might be struct that implements interface function Interface, eg: gvar.Var.
 		if v, ok := srcValue.(localinterface.IInterface); ok {
 			return doConvertWithJsonCheck(v.Interface(), dstPointer)