{"id":510,"date":"2018-05-20T22:47:51","date_gmt":"2018-05-20T13:47:51","guid":{"rendered":"https:\/\/blog.capilano-fw.com\/?p=510"},"modified":"2018-05-20T22:47:51","modified_gmt":"2018-05-20T13:47:51","slug":"laravel%e3%81%aemany-to-many%e5%a4%9a%e5%af%be%e5%a4%9a%e3%83%86%e3%83%bc%e3%83%96%e3%83%ab%e5%ae%9f%e4%be%8b","status":"publish","type":"post","link":"https:\/\/blog.capilano-fw.com\/?p=510","title":{"rendered":"Laravel\u306eMany-to-Many(\u591a\u5bfe\u591a)\u30c6\u30fc\u30d6\u30eb\u5b9f\u4f8b"},"content":{"rendered":"

\u3055\u3066\u3055\u3066\u3001Laravel\u306e\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u7ba1\u7406\u306b\u306f\u59cb\u3081\u304b\u3089\u5f37\u529b\u306a\u30ea\u30ec\u30fc\u30b7\u30e7\u30f3\u30b7\u30c3\u30d7\u3092\u69cb\u7bc9\u3059\u308b\u6a5f\u80fd\u304c\u5099\u308f\u3063\u3066\u3044\u307e\u3059\u304c\u3001Many-to-Many(\u591a\u5bfe\u591a)\u306e\u95a2\u4fc2\u3092\u69cb\u7bc9\u3059\u308b\u5834\u5408\u306f\u3001\u3055\u3059\u304c\u306b\u5c11\u3057\u3060\u3051\u8907\u96d1\u306b\u306a\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n

\u79c1\u81ea\u8eab\u3082\u30ea\u30ec\u30fc\u30b7\u30e7\u30f3\u30b7\u30c3\u30d7\u306eDB\u69cb\u9020\u3092\u8003\u3048\u308b\u5834\u5408\u306b\u300c\u3042\u308c\u3001\u3069\u3046\u3060\u3063\u305f\u3063\u3051\uff1f\uff1f\u300d\u3068\u3044\u3046\u3053\u3068\u3082\u305f\u307e\u306b\u3042\u308b\u306e\u3067\u3001\u305b\u3063\u304b\u304f\u306a\u306e\u3067\u3053\u308c\u3092\u6a5f\u306b\u5b9f\u4f8b\u3068\u3057\u3066\u307e\u3068\u3081\u3066\u304a\u304f\u3053\u3068\u306b\u3057\u307e\u3057\u305f\u3002<\/p>\n

\u305c\u3072\u304a\u5f79\u306b\u305f\u3066\u305f\u3089\u5b09\u3057\u3044\u3067\u3059\uff01<\/p>\n

\"\"<\/p>\n

\u30e2\u30c7\u30eb\u3092\u3064\u304f\u308b<\/h1>\n

\u307e\u305a\u306f\u3001\u30ea\u30ec\u30fc\u30b7\u30e7\u30f3\u30b7\u30c3\u30d7\u3092\u4f5c\u308a\u305f\u3044\uff12\u3064\u306e\u30e2\u30c7\u30eb\u3092\u4f5c\u308a\u307e\u3057\u3087\u3046\u3002<\/p>\n

\u4eca\u56de\u306e\u4f8b\u306f\u3001\u3042\u308b\u751f\u5f92\u30b0\u30eb\u30fc\u30d7\u306e\u8da3\u5473\u3092\u7ba1\u7406\u3059\u308b\u3001<\/p>\n

    \n
  1. Student\u3000\u30fb\u30fb\u30fb\u3000\u751f\u5f92<\/strong><\/li>\n
  2. Hobby\u3000\u30fb\u30fb\u30fb\u3000\u8da3\u5473<\/strong><\/li>\n<\/ol>\n

    \u306e\u30c6\u30fc\u30d6\u30eb\u3067\u3084\u3063\u3066\u307f\u308b\u3053\u3068\u306b\u3057\u307e\u3059\u3002<\/p>\n

    \u3067\u306f\u3001\u307e\u305a\u306fLaravel\u306eArtisan\u30b3\u30de\u30f3\u30c9\u3092\u4f7f\u3063\u3066\u30e2\u30c7\u30eb\u3092\u4f5c\u6210\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n

    php artisan make:model Student -m<\/strong><\/pre>\n
    php artisan make:model Hobby -m<\/strong><\/pre>\n
    \u203b\u300c-m<\/strong>\u300d\u304c\u3064\u3051\u3066\u3044\u308b\u306e\u306f\u3001\u81ea\u52d5\u7684\u306b\u30de\u30a4\u30b0\u30ec\u30fc\u30b7\u30e7\u30f3\u3082\u4f5c\u6210\u3057\u3066\u304f\u308c\u308b\u304b\u3089\u3067\u3059\u3002\u30de\u30a4\u30b0\u30ec\u30fc\u30b7\u30e7\u30f3\u306f\u6b21\u306e\u9805\u76ee\u3067\u8aac\u660e\u3057\u307e\u3059\u3002<\/p>\n
    \u6b21\u306b\u4f5c\u6210\u3057\u305f\u300cStudent\u300d\u3068\u300cHobby\u300d\u30e2\u30c7\u30eb\u5185\u306b\u30ea\u30ec\u30fc\u30b7\u30e7\u30f3\u30b7\u30c3\u30d7\u3092\u8a2d\u5b9a\u3057\u307e\u3059\u3002<\/p>\n
    <?php\r\n\r\nnamespace App;\r\n\r\nuse Illuminate\\Database\\Eloquent\\Model;\r\n\r\nclass Student<\/strong> extends Model\r\n{\r\n    \/**\r\n     * The roles that belong to the user.\r\n     *\/\r\n    public function hobbies()<\/strong>\r\n    {<\/strong>\r\n        return $this->belongsToMany('App\\Hobby');<\/strong>\r\n    }<\/strong>\r\n}<\/pre>\n
    <?php\r\n\r\nnamespace App;\r\n\r\nuse Illuminate\\Database\\Eloquent\\Model;\r\n\r\nclass Hobby<\/strong> extends Model\r\n{\r\n    \/**\r\n     * The roles that belong to the user.\r\n     *\/\r\n    public function students()<\/strong>\r\n    {<\/strong>\r\n        return $this->belongsToMany('App\\Student');<\/strong>\r\n    }<\/strong>\r\n}<\/pre>\n
    \u30de\u30a4\u30b0\u30ec\u30fc\u30b7\u30e7\u30f3\u3092\u3064\u304f\u308b<\/h1>\n
    \u3055\u3063\u304d\u30e2\u30c7\u30eb\u3092\u4f5c\u3063\u305f\u3068\u304d\u306b\u5bfe\u5fdc\u3059\u308b\u30de\u30a4\u30b0\u30ec\u30fc\u30b7\u30e7\u30f3\u3082\u4e00\u7dd2\u306b\u4f5c\u6210\u3057\u305f\u306e\u3067\u3001\u65b0\u3057\u304f\u5fc5\u8981\u306a\u306e\u306f\u300cStudent\u300d\u3068\u300cHobby\u300d\u3092\u3064\u306a\u3050Pivot\u30c6\u30fc\u30d6\u30eb\u3060\u3051\u3067\u3059\u3002\u4ee5\u4e0b\u306e\u30b3\u30de\u30f3\u30c9\u3067\u4f5c\u6210\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n
    php artisan make:migration create_student_hobbies_table<\/strong><\/pre>\n
    \u3067\u306f\u3001\u5168\u90e8\u3067\uff13\u3064\u3042\u308b\u30de\u30a4\u30b0\u30ec\u30fc\u30b7\u30e7\u30f3\u306e\u4e2d\u8eab\u3092\u8a2d\u5b9a\u3057\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n
    \u203b\u5197\u9577\u306b\u306a\u308b\u306e\u3067\u3001up()\u30e1\u30bd\u30c3\u30c9\u306e\u4e2d\u8eab\u3060\u3051\u3092\u8868\u793a\u3057\u3066\u3044\u307e\u3059\u3002\u307e\u305f\u3001\u30b5\u30f3\u30d7\u30eb\u306a\u306e\u3067\u8ffd\u52a0\u3057\u3066\u3044\u308b\u30d5\u30a3\u30fc\u30eb\u30c9\u306f\u300cname\u300d\u306e\u307f\u3067\u3059\u3002\u9069\u5b9c\u5fc5\u8981\u306a\u30d5\u30a3\u30fc\u30eb\u30c9\u3092\u8ffd\u52a0\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n
    \uff11\uff0estudents<\/strong><\/p>\n
    Schema::create('students<\/strong>', function (Blueprint $table) {\r\n    $table->increments('id');\r\n    $table->string('name');<\/strong>\r\n    $table->timestamps();\r\n});<\/pre>\n
    \uff12\uff0ehobbies<\/strong><\/p>\n
    Schema::create('hobbies<\/strong>', function (Blueprint $table) {\r\n    $table->increments('id');\r\n    $table->string('name');<\/strong>\r\n    $table->timestamps();\r\n});<\/pre>\n
    \uff13\uff0ehobby_student\uff08Pivot\u30c6\u30fc\u30d6\u30eb\uff09<\/strong><\/p>\n
    Schema::create('hobby_student<\/strong>', function (Blueprint $table) {\r\n    $table->unsignedInteger('student_id<\/strong>')->index();\r\n    $table->foreign('student_id<\/strong>')->references('id')->on('students')->onDelete('cascade');\r\n    $table->unsignedInteger('hobby_id<\/strong>')->index();\r\n    $table->foreign('hobby_id<\/strong>')->references('id')->on('hobbies')->onDelete('cascade');\r\n});<\/pre>\n
    \u3053\u3053\u3067\u6ce8\u610f\u304c\u5fc5\u8981\u306a\u306e\u306f\u3001onDelete()<\/strong>\u3067\u3059\u3002
    \n\u3053\u308c\u306f\u3001<\/p>\n