Small optimisations.

app/Http/Controllers/HomeController.php

@@ -1,5 +1,6 @@
 <?php namespace FireflyIII\Http\Controllers;
 
+use Auth;
 use Carbon\Carbon;
 use FireflyIII\Repositories\Account\AccountRepositoryInterface;
 use Input;
@@ -46,6 +47,16 @@ class HomeController extends Controller
         $accounts      = $repository->getFrontpageAccounts($frontPage);
         $savings       = $repository->getSavingsAccounts();
 
+        // check if all books are correct.
+        $sum = floatval(Auth::user()->transactions()->sum('amount'));
+        if ($sum == 0) {
+            Session::flash(
+                'error', 'Your transactions are unbalanced. This means a'
+                         . ' withdrawal, deposit or transfer was not stored properly. '
+                         . 'Please check your accounts and transactions for errors.'
+            );
+        }
+
         foreach ($accounts as $account) {
             $set = $repository->getFrontpageTransactions($account, $start, $end);
             if (count($set) > 0) {

app/Support/Preferences.php

@@ -16,7 +16,7 @@ class Preferences
      * @param      $name
      * @param null $default
      *
-     * @return null|\Preference
+     * @return null|Preference
      */
     public function get($name, $default = null)
     {
@@ -37,7 +37,7 @@ class Preferences
      * @param $name
      * @param $value
      *
-     * @return \Preference
+     * @return Preference
      */
     public function set($name, $value)
     {

app/User.php

@@ -75,6 +75,14 @@ class User extends Model implements AuthenticatableContract, CanResetPasswordCon
         return $this->hasManyThrough('FireflyIII\Models\PiggyBank', 'FireflyIII\Models\Account');
     }
 
+    /**
+     * @return \Illuminate\Database\Eloquent\Relations\HasManyThrough
+     */
+    public function transactions()
+    {
+        return $this->hasManyThrough('FireflyIII\Models\Transaction', 'FireflyIII\Models\TransactionJournal');
+    }
+
     /**
      * @return \Illuminate\Database\Eloquent\Relations\HasMany
      */