price check and display flex

alkatorapi/views.py

@@ -388,7 +388,7 @@ def cart_buy(request):
 
     for cp in cart_products:
         if cp.quantity > cp.product.quantity:
-            return HttpResponse('{"status": "failed", "reason": "Nemáme dostatek ' + cp.product.name + ' na skladě!"}', status=400)
+            return HttpResponse('{"status": "failed", "reason": "Nemáme dostatek ' + cp.product.name + ' na skladě!"}', status=400, content_type='application/json')
 
     invoice = Invoice(
         user=user,
@@ -411,6 +411,9 @@ def cart_buy(request):
         total_price += cp.quantity * cp.product.price
         ip.save()
 
+    if total_price <= 0:
+        return HttpResponse('{"status": "failed", "reason": "Prosím přidejte svoje položky do košíku!"}', status=400, content_type='application/json')
+
     payment_data = {
         'merchant': COMGATE_MERCHANT,
         'test': 'true' if COMGATE_TEST else 'false',

frontend/src/scripts/index.js

@@ -344,7 +344,7 @@ class Main extends Component {
         </table>
     </div>}
     {this.state.page == "#eshop" &&
-        <div class="container">
+        <div class="container" style={{display: "flex"}}>
             {this.state.products.map(product =>
                 <div class="card" style={{width: "18rem"}}>
                     <img src={product.img} class="card-img-top" alt="..." />