update migrations

database/migrations/2021_09_06_014744_create_holdings_table.php

@@ -0,0 +1,39 @@
+<?php
+
+use App\Models\Portfolio;
+use Illuminate\Support\Facades\Schema;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Database\Migrations\Migration;
+
+class CreateHoldingsTable extends Migration
+{
+    /**
+     * Run the migrations.
+     *
+     * @return void
+     */
+    public function up()
+    {
+        Schema::create('holdings', function (Blueprint $table) {
+            $table->id();
+            $table->foreignIdFor(Portfolio::class, 'portfolio_id')->onDelete('cascade');
+            $table->string('symbol');
+            $table->float('quantity', 12, 4);
+            $table->float('average_cost_basis', 12, 4);
+            $table->float('total_cost_basis', 12, 4)->nullable();
+            $table->float('realized_gain_loss_dollars', 12, 4)->nullable();
+            $table->float('dividends_earned', 12, 4)->nullable();
+            $table->timestamps();
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     *
+     * @return void
+     */
+    public function down()
+    {
+        Schema::dropIfExists('holdings');
+    }
+}