php - Eloquent 渴望加载

Question

Eloquent 指南 http://laravel.com/docs/4.2/eloquent包含以下内容:-

Eager Load Constraints

Sometimes you may wish to eager load a relationship, but also specify a condition for the eager load. Here's an example:

$users = User::with(array('posts' => function($query)
{
    $query->where('title', 'like', '%first%');

}))->get();

In this example, we're eager loading the user's posts, but only if the post's title column contains the word "first".

如何扭转这一局面，以便只获得标题列包含“first”一词的帖子的用户？

换句话说，我只想要帖子包含“first”一词的用户，并且我想立即加载这些帖子。如果有 10 个用户，其中 3 个用户的帖子包含“first”一词，那么我的 get() 将仅返回 3 个用户，每个用户都有急切加载的帖子，且标题包含“first”。

Answer 1

我相信您正在寻找这样的东西(未经测试):

$first = 'first';
$users = User::whereHas('posts' => function($q) use ($first)
{
    $q->where('title', 'like', "%{$first}%");

})->with(['posts' => function($q) use ($first)
{
   $q->where('title', 'like', "%{$first}%");

}])->get();