feat(database-hosts): allow linking of multiple nodes

database/migrations/2021_01_30_193343_add_database_host_id_column_to_nodes_table.php

@@ -0,0 +1,46 @@
+<?php
+
+use Illuminate\Support\Facades\Schema;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Database\Migrations\Migration;
+
+class AddDatabaseHostIdColumnToNodesTable extends Migration
+{
+    /**
+     * Run the migrations.
+     *
+     * @return void
+     */
+    public function up()
+    {
+        Schema::table('database_hosts', function (Blueprint $table) {
+            $table->dropForeign(['node_id']);
+            $table->dropColumn('node_id');
+        });
+
+        Schema::table('nodes', function (Blueprint $table) {
+            $table->integer('database_host_id')->nullable()->unsigned()->after('daemonBase');
+            $table->index('database_host_id')->nullable();
+            $table->foreign('database_host_id')->references('id')->on('database_hosts')->onDelete('set null');
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     *
+     * @return void
+     */
+    public function down()
+    {
+        Schema::table('nodes', function (Blueprint $table) {
+            $table->dropForeign(['database_host_id']);
+            $table->dropColumn('database_host_id');
+        });
+
+        Schema::table('database_hosts', function (Blueprint $table) {
+            $table->integer('node_id')->nullable()->unsigned()->after('max_databases');
+            $table->index('node_id')->nullable();
+            $table->foreign('node_id')->references('id')->on('nodes');
+        });
+    }
+}