Some new code, transaction groups among them.

app/models/TransactionGroup.php

@@ -0,0 +1,38 @@
+<?php
+use LaravelBook\Ardent\Ardent;
+
+class TransactionGroup extends Ardent
+{
+
+    public static $rules = [
+        'relation' => 'required|in:balance'
+    ];
+
+    /**
+     * @return array
+     */
+    public function getDates()
+    {
+        return ['created_at', 'updated_at'];
+    }
+
+    /**
+     * @return \Illuminate\Database\Eloquent\Relations\HasMany
+     */
+    public function transactionjournals()
+    {
+        return $this->belongsToMany('TransactionJournal');
+    }
+
+    /**
+     * User
+     *
+     * @return \Illuminate\Database\Eloquent\Relations\BelongsTo
+     */
+    public function user()
+    {
+        return $this->belongsTo('User');
+    }
+
+
+}