觀看Laravel Eloquent: 關聯文章時候
https://docs.laravel-dojo.com/laravel/5.5/eloquent-relationships#one-to-one

**我們可以使用 Eloquent 的動態屬性來取得關聯的記錄。動態屬性可以讓你存取關聯方法，這就像是在模型上定義它們的屬性一樣：

這邊有點疑惑**

使用了以下做法測試

<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Model;

class User extends Model
{
	protected $table = "user";
    //key不設定為預設的id，使用uid
    protected $primaryKey = "uid";

    public function account()
    {
        return $this->hasMany('App\Models\UserAccount','user_id','uid');
    }
}

namespace App\Models;

use Illuminate\Database\Eloquent\Model;

class UserAccount extends Model
{
    protected $table = "user_accounts";
}

在使用以下方法進行時候有點疑問，為啥一定要用find()方法，才能使用->account呢?

測試用:

//這樣可以
$account = \App\Models\User::find(1)->account;

//這樣不行 顯示Property [account] does not exist on this collection instance.
$account = \App\Models\User::where('uid',1)->get()->account;

//這樣不行 顯示Property [account] does not exist on this collection instance.
$account = \App\Models\User::all()->account;

//這樣不行 顯示Method account does not exist.
$account = \App\Models\User::where('uid',1)->get()->account();

-------------------------------分隔線----------------------------------

//不使用關聯方法，單純搜尋一個表資料，都是正常的。

//找ID 正常
$account = \App\Models\User::find(1);
$account = \App\Models\User::where('uid',1)->get();
//找all 正常
$account = \App\Models\User::all();
$account = \App\Models\User::get();