php - Eloquent 关系设置，同一个表 laravel 5.2 的两个外键

Question

我遇到了大问题，我在我的项目中维护 Eloquent 关系设置，我有以下关系:

1. 存储在用户表中的与登录相关的用户信息。
2. 存储在配置文件信息中的用户配置文件相关信息。
3. 地址表中存储的用户地址
4. 存储在城市、州、国家等配置中的配置相关信息

努力

下面是迁移和模型及其关系:

用户迁移表:

use Illuminate\Database\Schema\Blueprint;
use Illuminate\Database\Migrations\Migration;

class CreateUsersTable extends Migration
{
    /**
     * Run the migrations.
     *
     * @return void
     */
    public function up()
    {
        Schema::create('users', function (Blueprint $table) {
            $table->increments('id');
            $table->string('email')->unique();
            $table->string('password', 60);
            $table->rememberToken();
            $table->timestamps();
        });
    }

    /**
     * Reverse the migrations.
     *
     * @return void
     */
    public function down()
    {
        Schema::drop('users');
    }
}

用户模型:

namespace App;

use Illuminate\Foundation\Auth\User as Authenticatable;

class User extends Authenticatable
{
    /**
     * The attributes that are mass assignable.
     *
     * @var array
     */
    protected $fillable = [
        'email', 'password',
    ];

    /**
     * The attributes excluded from the model's JSON form.
     *
     * @var array
     */
    protected $hidden = [
        'password', 'remember_token',
    ];

    public function profile()
    {
        return $this->hasOne('App\Profile','user_id');
    }
}

配置文件迁移表:

use Illuminate\Database\Schema\Blueprint;
use Illuminate\Database\Migrations\Migration;

class CreateProfilesTable extends Migration
{
    /**
     * Run the migrations.
     *
     * @return void
     */
    public function up()
    {
        Schema::create('profiles', function (Blueprint $table) {
            $table->increments('profile_id');
            $table->integer('user_id')->unsigned();
            $table->foreign('user_id')->references('id')->on('users')->onDelete('cascade');
            $table->string('lastname')->nullable();
            $table->string('firstname')->nullable();
            $table->string('gender')->nullable();
            $table->string('phonenumber', 20)->nullable();
            $table->timestamps();
        });
    }

    /**
     * Reverse the migrations.
     *
     * @return void
     */
    public function down()
    {
        Schema::drop('profiles');
    }
}

资料模型:

namespace App;

use Illuminate\Database\Eloquent\Model;

class Profile extends Model
{
     protected $fillable = [
        'firstname', 'lastname',
    ];

    public function user(){
        return $this->belongsTo('App\User');
    }
    public function address()
    {
        return $this->hasOne('App\Address','profile_id');
    }
}

配置迁移表:

use Illuminate\Database\Schema\Blueprint;
use Illuminate\Database\Migrations\Migration;

class CreateConfigurationsTable extends Migration
{
    /**
     * Run the migrations.
     *
     * @return void
     */
    public function up()
    {
        Schema::create('configurations', function (Blueprint $table) {
            $table->increments('config_id');
            $table->string('configuration_name');
            $table->string('configuration_type');
            $table->string('parent_id');
            $table->timestamps();
        });
    }

    /**
     * Reverse the migrations.
     *
     * @return void
     */
    public function down()
    {
        Schema::drop('configurations');
    }
}

配置模型:

namespace App;

use Illuminate\Database\Eloquent\Model;

class Configuration extends Model
{
    public function children() {
        return $this->hasMany('App\Configuration','parent_id');
    }
    public function parent() {
        return $this->belongsTo('App\Configuration','parent_id');
    }

    public function city() {
        return $this->hasOne('App\Address', 'city');
    }

    public function state() {
      return $this->hasOne('App\Address', 'state');
    }

    public function country() {
        return $this->hasOne('App\Address', 'country');
    }
}

地址迁移表:

use Illuminate\Database\Schema\Blueprint;
use Illuminate\Database\Migrations\Migration;

class CreateAddressesTable extends Migration
{
    /**
     * Run the migrations.
     *
     * @return void
     */
    public function up()
    {
        Schema::create('addresses', function (Blueprint $table) {
            $table->increments('address_id');
            $table->integer('profile_id')->unsigned();
            $table->foreign('profile_id')->references('profile_id')->on('profiles')->onDelete('cascade');
            $table->string('address')->nullable();
            $table->integer('city')->unsigned();
            $table->foreign('city')->references('config_id')->on('configurations')->onDelete('cascade');
            $table->string('pincode')->nullable();
            $table->integer('state')->unsigned();
            $table->foreign('state')->references('config_id')->on('configurations')->onDelete('cascade');
            $table->integer('country')->unsigned();
            $table->foreign('country')->references('config_id')->on('configurations')->onDelete('cascade');
            $table->timestamps();
        });
    }

    /**
     * Reverse the migrations.
     *
     * @return void
     */
    public function down()
    {
        Schema::drop('addresses');
    }
}

地址模型:

namespace App;

use Illuminate\Database\Eloquent\Model;

class Address extends Model
{
    public function profile(){
        return $this->belongsTo('App\Profile');
    }

    public function city() {
        return $this->belongsTo('App\Configuration');
    }

    public function state() {
      return $this->belongsTo('App\Configuration');
    }

    public function country() {
        return $this->belongsTo('App\Configuration');
    }
}

我用过Eloquent relation setup, two foreign keys to same table使我的项目关系。但不幸的是，上面的代码没有生成期望的输出。看一看:

如果我使用命令 Auth::user()->profile->firstname 它将打印用户的名字。所以如果我使用 Auth::user()->profile->address->city 它应该打印存储在配置表中的城市名称，而是打印名称它打印 id。

请给我建议解决方案。

谢谢，

Answer 1

嗯，我找到了我自己问题的解决方案。感谢所有认为这个问题有值(value)的人。

好吧，我们不需要更改用户或配置文件，我们只需要对配置和地址模型进行一些更改即可。

改变

class Address extends Model
{
    public function profile(){
        return $this->belongsTo('App\Profile');
    }

    public function city() {
        return $this->belongsTo('App\Configuration');
    }

    public function state() {
      return $this->belongsTo('App\Configuration');
    }

    public function country() {
        return $this->belongsTo('App\Configuration');
    }
}

到

class Address extends Model
{
    public function profile(){
        return $this->belongsTo('App\Profile');
    }

    public function cityConfiguration() {
        return $this->belongsTo('App\Configuration', 'city');
    }

    public function stateConfiguration() {
      return $this->belongsTo('App\Configuration', 'state');
    }

    public function countryConfiguration() {
        return $this->belongsTo('App\Configuration', 'country');
    }
}

和改变

class Configuration extends Model
{
    public function children() {
        return $this->hasMany('App\Configuration','parent_id');
    }
    public function parent() {
        return $this->belongsTo('App\Configuration','parent_id');
    }

    public function city() {
        return $this->hasOne('App\Address', 'city');
    }

    public function state() {
      return $this->hasOne('App\Address', 'state');
    }

    public function country() {
        return $this->hasOne('App\Address', 'country');
    }
}

给

class Configuration extends Model
{
    public function children() {
        return $this->hasMany('App\Configuration','parent_id');
    }
    public function parent() {
        return $this->belongsTo('App\Configuration','parent_id');
    }

    public function city() {
        return $this->hasOne('App\Address', 'city');
    }

    public function state() {
      return $this->hasOne('App\Address', 'state');
    }

    public function country() {
        return $this->hasOne('App\Address', 'country');
    }
}

就是这样。一切正常。