Laravel リレーション設定

はじめに

• 下記のリレーションの設定をモデルに設定する px-wing.hatenablog.com

コード

• Articleモデルの場合

<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\Model;

class Article extends Model
{
    use HasFactory;

    public function article_categories()
    {
        return $this->hasMany('App\Models\ArticleCategory');
    }

    public function user()
    {
        print "test";
        return $this->belongsTo('App\Models\User', 'foreign_key');
    }     
}

• Articleモデルの場合

<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\Model;

class Article extends Model
{
    use HasFactory;

    public function article_categories()
    {
        return $this->hasMany('App\Models\ArticleCategory');
    }

    public function user()
    {
        print "test";
        return $this->belongsTo('App\Models\User', 'foreign_key');
    }     
}

• ArticleCategory モデルの場合

<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\Model;

class ArticleCategory extends Model
{
    use HasFactory;
    public function category()
    {
        return $this->belongsTo('App\Models\Category', 'foreign_key', 'category_id');
    }

    public function article()
    {
        return $this->belongsTo('App\Models\Article', 'foreign_key');
    }       
}

• Categoryの場合

<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\Model;

class Category extends Model
{
    use HasFactory;

    public function article_categories()
    {
        return $this->hasMany('App\Models\ArticleCategory');
    }    
}

確認

• tinkerで確認するとリレーションしてデータが取得できている事は確認できるが、全部のパターンで検証できていないので上記の設定にミスがあったら、ご指摘ください

>>> $articles = App\Models\User::find(1)->articles[0]->article_categories[0]
=> App\Models\ArticleCategory {#4357
     id: 2,
     category_id: 1,
     article_id: 3,
     created_at: "2020-10-08 08:48:35",
     updated_at: "2020-10-08 08:48:35",
   }