update

models/user.go

@@ -7,3 +7,12 @@ type User struct {
 	Password     string
 	PasswordHash []byte
 }
+
+// GetUserByID 根据 ID 查询用户
+func GetUserByID(id uint) (*User, error) {
+    var user User
+    if err := DB.First(&user, id).Error; err != nil {
+        return nil, err
+    }
+    return &user, nil
+}