在Eloquent中检索嵌套关系？

Question

我有三个型号:

1. 涂料
2. 汽车
3. 使

涂料:

{
    "id" : 1,
    "stuff" : "...",
    "car_id" : "4"
}

汽车:

{
    "id" : 4,
    "other_stuff" : "...",
    "make_id" : "7",
}

使:

{
    "id" : 7,
    "make_name" : "Toyota"
}

当我希望能够获得以下结果而无需手动调用Make模型时:

// single Eloquent query to return: 
    {
        "id" : 1,
        "stuff" : "...",
        "car_id" : "4",
        "car" :     {
            "id" : 4,
            "other_stuff" : "...",
            "make_id" : "7",
            "make" :     {
                "id" : 7,
                "make_name" : "Toyota"
            }
        }
    }

单嵌套很好,因为你可以使用Paint :: with('car').汽车模型有Car :: with('car'),但我不知道如何将两者结合起来.

Answer 1

使用嵌套的预先加载:

Paint::with('car.make')->get();