Laravel 限制查询参数结果

Question

我有一个查询，它根据用户的输入过滤电影，我需要添加一个 limit 作为查询参数，这样它就限制了返回的电影数量，我如何添加这个，我我是编写雄辩的查询的新手。

查询

$films = Film
::when($request->input('first'), function ($query, $first) {
    $query->whereHas('options', function ($query) use ($first) {
        $query->where('first', $main);
    });
})
->when($request->input('second'), function ($query, $second) {
    $query->whereHas('options', function ($query) use ($second) {
        $query->where('second', $second );
    });
})
->when($request->input('age'), function ($query, $age) {
    $query->whereHas('ageRatings', function ($query) use ($age) {
        $query->where('age', $age);
    });
})
->when($request->input('country'), function ($query, $country) {
    $query->whereHas('locations', function ($query) use ($country) {
        $query->where('country', $country);
    });
})
->when($request->input('city'), function ($query, $city) {
    $query->whereHas('locations', function ($query) use ($city) {
        $query->where('city', $city);
    });
})
->get();

Answer 1

您可以使用$query->limit(5) 或$query->take(5)。

如果您想跳过前 5 个结果，请使用 $query->skip(5)

如果要添加分页，可以使用$query->paginate(5)

查看更多：Query Builder

Answer 2

这两种方法都可以使用

限制方法

$limit = 10;
$films = Film
::when($request->input('first'), function ($query, $first) {
    $query->whereHas('options', function ($query) use ($first) {
        $query->where('first', $first);
    });
})
->when($request->input('second'), function ($query, $second) {
    $query->whereHas(‘options', function ($query) use ($second) {
        $query->where('second', $second);
    });
})
->when($request->input('age'), function ($query, $age) {
    $query->whereHas('ageRatings', function ($query) use ($age) {
        $query->where('age', $age);
    });
})
->when($request->input('country'), function ($query, $country) {
    $query->whereHas('locations', function ($query) use ($country) {
        $query->where('country', $country);
    });
})
->when($request->input('city'), function ($query, $city) {
    $query->whereHas('locations', function ($query) use ($city) {
        $query->where('city', $city);
    });
})
->limit($limit)
->get();

采取方法

$limit = 10;
    $films = Film
    ::when($request->input('first'), function ($query, $first) {
        $query->whereHas('options', function ($query) use ($first) {
            $query->where('first', $first);
        });
    })
    ->when($request->input('second'), function ($query, $second) {
        $query->whereHas('options', function ($query) use ($second) {
            $query->where('second', $second);
        });
    })
    ->when($request->input('age'), function ($query, $age) {
        $query->whereHas('ageRatings', function ($query) use ($age) {
            $query->where('age', $age);
        });
    })
    ->when($request->input('country'), function ($query, $country) {
        $query->whereHas('locations', function ($query) use ($country) {
            $query->where('country', $country);
        });
    })
    ->when($request->input('city'), function ($query, $city) {
        $query->whereHas('locations', function ($query) use ($city) {
            $query->where('city', $city);
        });
    })
    ->take($limit)
    ->get();