Laravel雄辩：渴望加载多个嵌套关系

Question

拉威尔说：

$books = App\Book::with('author.contacts')->get();

我需要的是这样的东西

$books = App\Book::with('author[contacts,publishers]')->get();

我们可以在一个关系中加载多个关系。

这有可能吗？

Answer 1

那么，现在你可以试试了

$books = App\Book::with(['author' => function($author){
     $author->with(['contacts', 'publishers'])->get();
}])->get();

Answer 2

Laravel留档在急切加载建议列出数组中的关系如下：

$books = App\Book::with(['author.contacts', 'author.publishers'])->get();

您可以拥有所需的任意多个关系。您还可以指定以下关系应包括哪些列：

//only id, name and email will be returned for author
//id must always be included
$books = App\Book::with(['author: id, name, email', 'author.contacts', 'author.publishers'])->get();

您还可以添加如下约束：

$books = App\Book::with(['author: id, name, email', 'author.contacts' => function ($query) {
                                          $query->where('address', 'like', '%city%');
                                     }, 'author.publishers'])->get();

Answer 3

你能行

 $books = App\Book::with('author.contacts','author.publishers')->get();