多态关系 - morphTo保存（）不识别自定义主键 [英] Polymorphic relation - morphTo save() not recognizing custom primary key

问题描述

用户模型：

public function userable()
{
    return $this->morphTo();
}

导师模型：

public function user()
{
    return $this->morphOne('App\Models\User', 'userable');
}

学生模型看起来与导师模型相同。

The student model looks the same as the mentor model.

学生和导师的表包含一个名为user_id的自定义PK，它引用用户表上的主键。

The tables for Students and Mentors contain a custom PK called user_id which references the primary key on the users table.

所以我想要做的是：

    $user = new User();
    $user->first_name = 'Trajce';
    $user->last_name = 'Petkoski';
    $user->nickname = 'ads';
    $user->administrator = '0';
    $user->email = 'asd';
    $user->password = Hash::make('test');
    $user->save();

    $mentor = new Mentor();
    $mentor->user_id = $user->id;
    $mentor->save();

    $user->userable_id = $mentor->user_id;
    $mentor->user()->save($user);

但是，在Users表中，userable_id设置为0，而userable_type值设置为值。这里的问题是save（）将其设置为预定义的0.任何想法在幕后发生什么？

However, on the Users table, userable_id is being set to 0 while userable_type value is set to the corret value. The issue here is that save() sets it to a predefined 0. Any idea what's going on behind the scenes?

推荐答案

尝试添加数据到多态关系（morphOne）：

Try this to add data to Polymorphic relation (morphOne):

迁移：

// User
Schema::create('users', function (Blueprint $table) {
    $table->increments('id');
    $table->string('first_name');
    $table->string('last_name');
    $table->string('nickname');
    $table->integer('administrator');
    $table->string('email');
    // add these two for the relation to work
    $table->integer('userable_id')->unsigned();
    $table->string('userable_type');
    //
    $table->rememberToken();
    $table->timestamps();
});

// Mentor
Schema::create('mentors', function (Blueprint $table) {
    $table->increments('id');
    $table->timestamps();
});

用户模型

public function userable()
{
    return $this->morphTo();
}

导师模型

public function user()
{
   return $this->morphOne('App\Models\User', 'userable');
}

协会代码

$mentor = new Mentor();
// this is important: first save mentor
$mentor->save();

$userdata = [
    'first_name' => 'Trajce',
    'last_name' => 'Petkoski',
    'nickname' => 'ads',
    'administrator' => 0,
    'email' => 'asd',
    'password' => Hash::make('test')
 ];

$mentor->user()->create($userdata);

这样做在我的Laravel 5.4测试安装中的魅力

This works like a charm in my Laravel 5.4 test installation

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