Question

我正在使用@each blade指令循环查询结果数组并渲染它们（在这种情况下，@each指令往往比foreach循环更好一点，因为HTML将会是根据查询结果呈现更改）。这一切都运行正常，但我有尝试获取查询本身的当前索引的问题。

换句话说，使用@each指令，我需要能够访问正在呈现的部分中的当前循环的键（或索引）。

如果您有任何需要了解的信息，请询问。

感谢您阅读！

Answer 1

查看为@each指令运行的源代码会产生以下结果：

照亮\视图\ Factory.php

/**
 * Get the rendered contents of a partial from a loop.
 *
 * @param  string  $view
 * @param  array   $data
 * @param  string  $iterator
 * @param  string  $empty
 * @return string
 */
public function renderEach($view, $data, $iterator, $empty = 'raw|')
{
    $result = '';

    // If is actually data in the array, we will loop through the data and append
    // an instance of the partial view to the final result HTML passing in the
    // iterated value of this data array, allowing the views to access them.
    if (count($data) > 0) {
        foreach ($data as $key => $value) {
            $data = ['key' => $key, $iterator => $value];

            $result .= $this->make($view, $data)->render();
        }
    }

    // If there is no data in the array, we will render the contents of the empty
    // view. Alternatively, the "empty view" could be a raw string that begins
    // with "raw|" for convenience and to let this know that it is a string.
    else {
        if (Str::startsWith($empty, 'raw|')) {
            $result = substr($empty, 4);
        } else {
            $result = $this->make($empty)->render();
        }
    }

    return $result;
}

如果你注意到这些方面：

$data = ['key' => $key, $iterator => $value];

$result .= $this->make($view, $data)->render();

名为$key的变量会自动传递给渲染视图。那应该包含数组循环的当前索引。

Laravel - @each获得当前迭代

1 个答案: