問題描述

假設我們正在使用 Laravel 的查詢構建器:

$users = DB::table('really_long_table_name')-> 選擇('really_long_table_name.id')->get();

我正在尋找與此 SQL 等效的語句:

really_long_table_name AS short_name

當我必須輸入大量選擇和 wheres(或者通常我在選擇的列別名中也包含別名，并且它在結果數(shù)組中使用)時，這將特別有用.如果沒有任何表別名，我就需要打更多的字，而且一切都變得不那么可讀了.在 laravel 文檔中找不到答案，有什么想法嗎?

Laravel 支持使用 AS 為表和列設置別名.試試

$users = DB::table('really_long_table_name AS t')->select('t.id AS uid')->get();

讓我們用一個很棒的 tinker 工具來看看它的作用

Lets say we are using Laravel's query builder:

$users = DB::table('really_long_table_name')
           ->select('really_long_table_name.id')
           ->get();

I'm looking for an equivalent to this SQL:

really_long_table_name AS short_name

This would be especially helpful when I have to type a lot of selects and wheres (or typically I include the alias in the column alias of the select as well, and it get's used in the result array). Without any table aliases there is a lot more typing for me and everything becomes a lot less readable. Can't find the answer in the laravel docs, any ideas?

Laravel supports aliases on tables and columns with AS. Try

$users = DB::table('really_long_table_name AS t')
           ->select('t.id AS uid')
           ->get();

Let's see it in action with an awesome tinker tool

$ php artisan tinker
[1] > Schema::create('really_long_table_name', function($table) {$table->increments('id');});
// NULL
[2] > DB::table('really_long_table_name')->insert(['id' => null]);
// true
[3] > DB::table('really_long_table_name AS t')->select('t.id AS uid')->get();
// array(
//   0 => object(stdClass)(
//     'uid' => '1'
//   )
// )

這篇關于如何在 Laravel Eloquent 查詢(或使用查詢生成器)中為表添加別名?的文章就介紹到這了，希望我們推薦的答案對大家有所幫助，也希望大家多多支持html5模板網(wǎng)！