Fix forgotten migration that caused node deletions to not be cascaded to all allocations.

closes #795

database/migrations/2017_12_04_184012_DropAllocationsWhenNodeIsDeleted.php

@@ -0,0 +1,32 @@
+<?php
+
+use Illuminate\Support\Facades\Schema;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Database\Migrations\Migration;
+
+class DropAllocationsWhenNodeIsDeleted extends Migration
+{
+    /**
+     * Run the migrations.
+     */
+    public function up()
+    {
+        Schema::table('allocations', function (Blueprint $table) {
+            $table->dropForeign(['node_id']);
+
+            $table->foreign('node_id')->references('id')->on('nodes')->onDelete('cascade');
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down()
+    {
+        Schema::table('allocations', function (Blueprint $table) {
+            $table->dropForeign(['node_id']);
+
+            $table->foreign('node_id')->references('id')->on('nodes');
+        });
+    }
+}