CodeIgniter活动记录一次删除多个记录 [英] CodeIgniter Active Record Delete Multiple Records At Once

问题描述

这是我的控制器功能之一。它从名为用户的数据库表中获取所有行，并将其放入数组中。然后，它将通过传递的数组数据加载一个名为 deleteuser的视图。

This is one of my controller functions. It grabs all the rows from a database table called 'users' and puts it into an array. It then loads a view called 'deleteuser' with the array data passed through.

function deleteuser(){



    $this->load->model('users');
    $employees['staff'] = $this->users->getStaff();
    $this->load->view('deleteuser', $employees);
}

在deleteuser视图中，数组生成了一个复选框类型输入。

In the deleteuser view, there's a checkbox type input generated from the array. The form action calls on a function called remove.

<form action="remove" method = "post">

<?php foreach($staff as $row): ?>
<div class="checkbox">
        <label>
        <input type="checkbox" name="delete[]" value="<?php echo $row->id ?>" />
        <?php echo $row->lastName . ", " . $row->firstName; ?>
        <br />
        </label> 

        <?php endforeach; ?>
        <br /> 
        <br />
        <input type="submit" name = "remove" value = "Delete" class = "btn btn-danger btn-lg pull-left" />

    </div>

remove函数从输入中获取delete数组，并将其传递给名为deleteUser的模型函数。 / p>

The remove function grabs the delete array from the input and passes it to a model function called deleteUser.

function remove(){
    $data = $this->input->post('delete');

    $this->users->deleteUser($data);

}

现在这是我遇到麻烦的地方。以下是deleteUser的模型函数，但给了我一个未定义的偏移量：1错误。任何帮助将不胜感激。

Now this is where I'm running into some trouble. Below is the model function for deleteUser, but it's giving me an undefined offset: 1 error. Any help would be appreciated.

function deleteUser($data)
{
    if ($data) {
        for ($i = 0; $i <= count($data); $i++)
        {
        $this->db->where('id', $data[$i]);
        $this->db->delete('users');
        }
    }
}

推荐答案

尽管@DamienPirsy的回答在解决您的问题上是正确的，但我还是建议您使用另一种方法。我会一次删除所有记录，而不是循环删除。

Though answer by @DamienPirsy is correct in addressing your problem, I would suggest an alternate approach. I would delete all records at once, rather than in a loop. This will minimize your number of queries against the DB.

function deleteUser($data)
{
    if (!empty($data)) {
        $this->db->where_in('id', $data);
        $this->db->delete('users');
    }
}

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