PostgreSQL的复杂案例&x27；s案例操作员

我有一个搜索方法，用于在数据库中查找用户。用户可能会隐藏一些个人信息（负责此操作的设置称为

profilePrivacyPermissions

），例如电话号码、电子邮件。例如，如果用户的电子邮件是隐藏的，那么当通过电子邮件搜索时，该用户不应出现在搜索结果中

profilePrivacyPermissions对象是用户对象的一部分，如下所示：

    "profilePrivacyPermissions": [
      {
        "screenType": 1,
        "isEverybody": true,
        "isContacts": false,
        "isNobody": false
      },
      {
        "screenType": 2,
        "isEverybody": false,
        "isContacts": false,
        "isNobody": true
      },
      {
        "screenType": 4,
        "isEverybody": true,
        "isContacts": false,
        "isNobody": false
      },
      {
        "screenType": 5,
        "isEverybody": true,
        "isContacts": false,
        "isNobody": false
      },
      {
        "screenType": 3,
        "isEverybody": true,
        "isContacts": false,
        "isNobody": false
      }
    ]

此枚举定义了几种屏幕类型：

export enum EScreenType {
    PHONE_NUMBER = 1,
    EMAIL = 2,
    PHOTO = 3,
    TASKS_NOTES_FOLDERS = 4,
    AUTO_ACCEPT_INVITES = 5,
}

以下是我用于此搜索的查询请求：

        const users = await this.userRepository.createQueryBuilder('user')
                                               .where(whereClause, filters)
                                               .leftJoinAndSelect('user.subscription', 'subscription')
                                               .leftJoinAndSelect('user.profilePrivacyPermissions', 'perms')
                                               .limit(ESearchResponseEntityNumber.USERS)
                                               .getMany();

和

whereClause

如下所示：

        const whereClause = `
        (CASE perms.isEverybody WHEN true THEN
            CASE perms.screenType
               WHEN ${EScreenType.PHONE_NUMBER} THEN "user".phone ILIKE :searchTerm
               WHEN ${EScreenType.EMAIL}        THEN "user".profile_email ILIKE :searchTerm
            END
        END
         OR "user".username ILIKE :searchTerm
        ) AND "user".id != :userId
        `;

现在我需要根据以下逻辑修改此查询：

当

TASKS\u NOTES\u文件夹

（其屏幕类型为4）为

false时

用户不应出现在 搜索结果

以下是我的尝试（但无效）：

        const whereClause = `
            (CASE
                WHEN perms.isEverybody = true THEN
                    CASE perms.screenType
                        WHEN ${EScreenType.PHONE_NUMBER} THEN "user".phone ILIKE :searchTerm
                        WHEN ${EScreenType.EMAIL}        THEN "user".profile_email ILIKE :searchTerm
                    END
                WHEN perms.isNobody = true AND perms.screenType = ${EScreenType.TASKS_NOTES_FOLDERS} THEN NULL
             END
             OR "user".username ILIKE :searchTerm
            ) AND "user".id != :userId
        `;