用户注销后禁止再次注册

controller/user.go

@@ -152,6 +152,21 @@ func Register(c *gin.Context) {
 			return
 		}
 	}
+	exist, err := model.CheckUserExistOrDeleted(user.Username, user.Email)
+	if err != nil {
+		c.JSON(http.StatusOK, gin.H{
+			"success": false,
+			"message": err.Error(),
+		})
+		return
+	}
+	if exist {
+		c.JSON(http.StatusOK, gin.H{
+			"success": false,
+			"message": "用户名已存在，或已注销",
+		})
+		return
+	}
 	affCode := user.AffCode // this code is the inviter's code, not the user's own code
 	inviterId, _ := model.GetUserIdByAffCode(affCode)
 	cleanUser := model.User{
@@ -525,7 +540,7 @@ func DeleteUser(c *gin.Context) {
 		})
 		return
 	}
-	err = model.DeleteUserById(id)
+	err = model.HardDeleteUserById(id)
 	if err != nil {
 		c.JSON(http.StatusOK, gin.H{
 			"success": true,

model/user.go

@@ -31,6 +31,23 @@ type User struct {
 	AffQuota         int            `json:"aff_quota" gorm:"type:int;default:0;column:aff_quota"`           // 邀请剩余额度
 	AffHistoryQuota  int            `json:"aff_history_quota" gorm:"type:int;default:0;column:aff_history"` // 邀请历史额度
 	InviterId        int            `json:"inviter_id" gorm:"type:int;column:inviter_id;index"`
+	DeletedAt        gorm.DeletedAt `json:"deleted_at" gorm:"index"`
+}
+
+// CheckUserExistOrDeleted check if user exist or deleted, if not exist, return false, nil, if deleted or exist, return true, nil
+func CheckUserExistOrDeleted(username string, email string) (bool, error) {
+	var user User
+	err := DB.Unscoped().First(&user, "username = ? or email = ?", username, email).Error
+	if err != nil {
+		if errors.Is(err, gorm.ErrRecordNotFound) {
+			// not exist, return false, nil
+			return false, nil
+		}
+		// other error, return false, err
+		return false, err
+	}
+	// exist, return true, nil
+	return true, nil
 }
 
 func GetMaxUserId() int {
@@ -40,7 +57,7 @@ func GetMaxUserId() int {
 }
 
 func GetAllUsers(startIdx int, num int) (users []*User, err error) {
-	err = DB.Order("id desc").Limit(num).Offset(startIdx).Omit("password").Find(&users).Error
+	err = DB.Unscoped().Order("id desc").Limit(num).Offset(startIdx).Omit("password").Find(&users).Error
 	return users, err
 }
 
@@ -80,6 +97,14 @@ func DeleteUserById(id int) (err error) {
 	return user.Delete()
 }
 
+func HardDeleteUserById(id int) error {
+	if id == 0 {
+		return errors.New("id 为空！")
+	}
+	err := DB.Unscoped().Delete(&User{}, "id = ?", id).Error
+	return err
+}
+
 func inviteUser(inviterId int) (err error) {
 	user, err := GetUserById(inviterId, true)
 	if err != nil {

web/src/components/UsersTable.js

@@ -72,11 +72,14 @@ const UsersTable = () => {
     }, {
         title: '状态', dataIndex: 'status', render: (text, record, index) => {
             return (<div>
-                {renderStatus(text)}
+                {record.deleted_at !== null? <Tag color='red'>已注销</Tag> : renderStatus(text)}
             </div>);
         },
     }, {
         title: '', dataIndex: 'operate', render: (text, record, index) => (<div>
+            {
+                record.deleted_at !== null ? <></>:
+                    <>
                         <Popconfirm
                             title="确定？"
                             okType={'warning'}
@@ -95,19 +98,6 @@ const UsersTable = () => {
                         >
                             <Button theme='light' type='secondary' style={{marginRight: 1}}>降级</Button>
                         </Popconfirm>
-            <Popconfirm
-                title="确定是否要删除此用户？"
-                content="此修改将不可逆"
-                okType={'danger'}
-                position={'left'}
-                onConfirm={() => {
-                    manageUser(record.username, 'delete', record).then(() => {
-                        removeRecord(record.id);
-                    })
-                }}
-            >
-                <Button theme='light' type='danger' style={{marginRight: 1}}>删除</Button>
-            </Popconfirm>
                         {record.status === 1 ?
                             <Button theme='light' type='warning' style={{marginRight: 1}} onClick={async () => {
                                 manageUser(record.username, 'disable', record)
@@ -119,6 +109,22 @@ const UsersTable = () => {
                             setEditingUser(record);
                             setShowEditUser(true);
                         }}>编辑</Button>
+                    </>
+
+            }
+            <Popconfirm
+                title="确定是否要删除此用户？"
+                content="硬删除，此修改将不可逆"
+                okType={'danger'}
+                position={'left'}
+                onConfirm={() => {
+                    manageUser(record.username, 'delete', record).then(() => {
+                        removeRecord(record.id);
+                    })
+                }}
+            >
+                <Button theme='light' type='danger' style={{marginRight: 1}}>删除</Button>
+            </Popconfirm>
         </div>),
     },];