update migrations

database/migrations/2021_02_25_041236_create_dividends_table.php

@@ -1,5 +1,6 @@
 <?php
 
+use App\Models\MarketData;
 use Illuminate\Database\Migrations\Migration;
 use Illuminate\Database\Schema\Blueprint;
 use Illuminate\Support\Facades\Schema;
@@ -16,7 +17,7 @@ class CreateDividendsTable extends Migration
         Schema::create('dividends', function (Blueprint $table) {
             $table->uuid('id')->primary(); 
             $table->date('date');
-            $table->string('symbol', 15);
+            $table->foreignIdFor(MarketData::class, 'symbol');
             $table->float('dividend_amount', 12, 4);
             $table->timestamps();
         });