Fix UpdateGroup

orm/group.go

@@ -2,6 +2,7 @@ package orm
 
 import (
 	"fmt"
+	"log"
 	"net/http"
 
 	"github.com/jinzhu/gorm"
@@ -87,7 +88,16 @@ func GetGroupForAdd(args map[string]string) (interface{}, error) {
 }
 
 func GetGroup(args map[string]string) (interface{}, error) {
-	return nil, nil
+	var group Group
+
+	id := args["id"]
+
+	if err := DB().Preload("Teachers").Where("id = ?", id).Find(&group).Error; err != nil {
+		return nil, err
+	}
+
+	return &group, nil
+
 }
 
 func UpdateGroup(args map[string]string, r *http.Request) (IDer, error) {
@@ -95,11 +105,17 @@ func UpdateGroup(args map[string]string, r *http.Request) (IDer, error) {
 	if err != nil {
 		return nil, err
 	}
+
+	log.Println("Before decoding...", group.(*Group).TeacherIDs)
 	err = renderer.Decode(group, r)
 	if err != nil {
 		return nil, err
 	}
 
+	if err := DB().Where(group.(*Group).TeacherIDs).Find(&group.(*Group).Teachers).Error; err != nil {
+		return nil, err
+	}
+	log.Println("After decoding...", group.(*Group).TeacherIDs)
 	_, err = SaveGroup(group)
 	if err != nil {
 		return nil, err