tissue/database/migrations/2019_03_26_224641_create_likes_table.php

<?php

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

class CreateLikesTable extends Migration
{
    /**
     * Run the migrations.
     *
     * @return void
     */
    public function up()
    {
        Schema::create('likes', function (Blueprint $table) {
            $table->increments('id');
            $table->integer('user_id')->index();
            $table->integer('ejaculation_id')->index();
            $table->timestamps();

            $table->unique(['user_id', 'ejaculation_id']);
            $table->foreign('user_id')->references('id')->on('users')->onDelete('cascade');
            $table->foreign('ejaculation_id')->references('id')->on('ejaculations')->onDelete('cascade');
        });
    }

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