Added support for searching by invoice number in the API

app/Http/Requests/InvoiceRequest.php

@@ -1,5 +1,7 @@
 <?php namespace App\Http\Requests;
 
+use App\Models\Invoice;
+
 class InvoiceRequest extends EntityRequest {
 
     protected $entityType = ENTITY_INVOICE;
@@ -8,6 +10,14 @@ class InvoiceRequest extends EntityRequest {
     {
         $invoice = parent::entity();
 
+        // support loading an invoice by its invoice number
+        if ($this->invoice_number && ! $invoice) {
+            $invoice = Invoice::scope()
+                        ->whereInvoiceNumber($this->invoice_number)
+                        ->withTrashed()
+                        ->firstOrFail();
+        }
+
         // eager load the invoice items
         if ($invoice && ! $invoice->relationLoaded('invoice_items')) {
             $invoice->load('invoice_items');

app/Ninja/Transformers/EntityTransformer.php

@@ -48,7 +48,7 @@ class EntityTransformer extends TransformerAbstract
     {
         $data = [
             'account_key' => $this->account->account_key,
-            'is_owner' => (bool) Auth::user()->owns($entity),
+            'is_owner' => (bool) (Auth::check() && Auth::user()->owns($entity)),
         ];
 
         if ($entity->relationLoaded('user')) {