Work on piggy banks [skip ci]

app/models/Piggybank.php

@@ -0,0 +1,21 @@
+<?php
+use LaravelBook\Ardent\Ardent as Ardent;
+
+class Piggybank extends Ardent
+{
+    public static $rules
+        = [
+            'name'       => 'required|between:1,255',
+            'account_id' => 'required|exists:accounts,id',
+            'targetdate' => 'date',
+            'amount'     => 'required|min:0',
+            'target'     => 'required|min:1',
+            'order'      => 'required:min:1',
+        ];
+
+    public function account()
+    {
+        return $this->belongsTo('Account');
+    }
+
+}