限制Laravel中嵌套关系的结果 | 限制Laravel中嵌套关系的结果

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问题描述

我有一个要设置条件和限制的嵌套关系.

I have a nested relationship that I want to set a condition and a limit.

$data = Accommodation::with('accommodationFacilities', 'city')
    ->take(10)
    ->with('accommodationRooms.roomPricingHistory')
    ->limit(2)
    ->where('is_deleted', 0)
    ->paginate(10);

现在我在第2行有一个嵌套关系，我想通过以下方式限制该关系: roomPricingHistory .

Now I have a nested relation on line 2 that I want to limit this relation by: roomPricingHistory.

该代码限制了父关系，即: accommodationRooms .

The code limits the parent relation which is: accommodationRooms.

任何想法如何限制子关系以及如何为其设置if，因此如果列=== 0，则应加载该行.

Any idea how I can limit the child relation and how can I set an if for it so if a column is === 0 this row should be loaded.

推荐答案

您可以尝试限制紧急加载

You could try constraining the eager loading

$data = Accommodation::with('accommodationFacilities', 'city')
    ->take(10)
    ->with(['accommodationRooms.roomPricingHistory' => function($query){
        $query->limit(2)
    }])
    ->limit(2)
    ->where('is_deleted', 0)
    ->paginate(10);

文档: https://laravel.com/docs/5.8/eloquent-relationships#eager-loading

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