更改Laravel中两个模型的子集合

Question

我有这个：

$merge = parents::with('children')->get();

这给了我：

  [{
  "id":1,
  "parent_name":"Robert",
  "children":[{
            "id":5,"name":"Susan","dob":"2010-11-11"},
            {"id":7,"name":"Tony","dob":"2014-12-10"}]
  }]

我想将age添加到具有预期输出的子代中，如下所示：

  [{
  "id":1,
  "parent_name":"Robert",
  "children":[{
            "id":5,"name":"Susan","dob":"2010-11-11","age":"10"},
            {"id":7,"name":"Tony","dob":"2014-12-10","age":"7"}]
  }]

我试过这个：

 return $merge->map(function ($detail) {
    $detail->age = \Carbon\Carbon::parse($detail->dob)->diffInYears();
    return $detail;});

它给了我：

  [{
  "id":1,
  "parent_name":"Robert",
  "age":0,
  "children":[{
            "id":5,"name":"Susan","dob":"2010-11-11"},
            {"id":7,"name":"Tony","dob":"2014-12-10"}]
  }]

我试过了：

    return $merge->children->map(function ($detail) {
    $detail->age = \Carbon\Carbon::parse($detail->dob)->diffInYears();
    return $detail;});

它返回

Property [children] does not exist on this collection instance.

有什么简单的方法可以实现我的目标吗？

Answer 1

循环每个父代及其子代，并添加新的age属性

$data = parents::with('children')->get();
        $data->each(function($parent) {
            $parent->children->each(function($child){
                $child->age = \Carbon\Carbon::parse($child->dob)->diffInYears();
            });
        });

我建议，我认为更好的方法是向您的模型添加一个属性，如下所示：

class modelName extends Model{
  protected $append = ['age'];

  public function getAgeAttribute(){
    return \Carbon\Carbon::parse($this->dob)->diffInYears();
  }


}

Answer 2

循环访问父级及其子级。最终计算年龄并将值放入数组。

$merge->map(function ($mer) {
    $mer->children->map(function ($child) {
        $age = \Carbon\Carbon::parse($child->dob)->diffInYears();
        $child->age = $age;
    });
});