如何在查询模型中使用 if 语句

Question

尝试搜索但没有找到解决我问题的答案。我想在此查询中包含一个 if 条件 select:

    $this->datatables->select('id,username,password,email,is_active,is_role,created_at,updated_at');

    $this->datatables->add_column('action', anchor(site_url('ms_users/read/'), 'Read') . " | " . anchor(site_url('ms_users/update/'), 'Update') . " | " . anchor(site_url('ms_users/delete/'), 'Delete', 'onclick="javasciprt: return confirm(\'Are You Sure ?\')"'), 'id');
    return $this->datatables->generate();

我想为 is_active 和 is_role 做这样的：

    /* 
    if (is_active == 1) {
        echo "Active";
    } else {
        echo "Nonaktif";
    }
    */

    /* 
    if (is_role == 1) {
        echo "Admin";
    } else if (is_role == 2){
        echo "Users";
    }
    */

Answer 1

可能是这样

$this->datatables->select('id,username,password,email,if(is_active=1,"Active","Nonaktif") as is_active,if(is_role=1,"Admin",if(is_role=2,"Users","Other users")) as is_role,created_at,updated_at');

或

尝试对 2 个以上的角色使用 CASE 语句

$this->datatables->select('id,username,password,email,if(is_active=1,'Active','Nonaktif') as is_active,CASE 
        WHEN is_role = 1 THEN "Admin"
        WHEN is_role = 2 THEN "Users"
        ELSE "Other User"
    END AS is_role,created_at,updated_at');

如何在查询模型中使用 if 语句

How to use if statement in query model

php

mysql

codeigniter

datatables