west2-online
diff --git a/‎internal/course/handler.go‎
Lines changed: 1 addition & 1 deletion b/‎internal/course/handler.go‎
Lines changed: 1 addition & 1 deletion
@@ -176,7 +176,7 @@ func (s *CourseServiceImpl) UpsertCustomCourse(ctx context.Context, req *course.
 			return resp, nil
 		}
 
-		// required 字段：前端一定传了，直接用新值
+		// optional 字段：前端未传则用旧值兜底，避免被零值覆盖
 		teacher := old.Teacher
 		if courseItem.Teacher != nil {
 			teacher = *courseItem.Teacher
Original file line number	Diff line number	Diff line change
`@@ -176,7 +176,7 @@ func (s CourseServiceImpl) UpsertCustomCourse(ctx context.Context, req course.`
`176`	`176`	`return resp, nil`
`177`	`177`	`}`
`178`	`178`
`179`		`- // required 字段：前端一定传了，直接用新值`
	`179`	`+ // optional 字段：前端未传则用旧值兜底，避免被零值覆盖`
`180`	`180`	`teacher := old.Teacher`
`181`	`181`	`if courseItem.Teacher != nil {`
`182`	`182`	`teacher = *courseItem.Teacher`