Question

Laravel 5不会在我的迁移文件上创建外键：我按照这里的文档 https://laravel.com/docs/5.3/blade它不起作用。在没有约束的情况下创建表

<?php

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

class Comments extends Migration
{
/**
 * Run the migrations.
 *
 * @return void
 */
public function up()
{
    Schema::create('comments',function($newTable){
        $newTable->increments('id');
        $newTable->integer('painting_id')->length(10)->unsigned();
        $newTable->integer('user_id');
        $newTable->text('comment');
        $newTable->date('crated')->default(Carbon::now());
        $newTable->timestamps();
    });

    Schema::table('comments',function($table){
        $table->foreign('painting_id')->references('id')->on('paintings')->onDelete('cascade');
    });


}

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

Answer 1

尝试将表设置为Innodb引擎。在表创建结束时添加它。

Schema::create('comments',function($newTable){
 //The other fields
     $newTable->engine = "InnoDB";        
});

Laravel 5外键不会被创建

1 个答案: