Use string for price of pricedetails.

src/Entity/PriceInformations/Pricedetail.php

@@ -90,11 +90,11 @@ class Pricedetail extends DBElement
     protected $orderdetail;
 
     /**
-     * @var float The price related to the detail. (Given in the selected currency)
+     * @var string The price related to the detail. (Given in the selected currency)
      * @ORM\Column(type="decimal", precision=11, scale=5)
      * @Assert\Positive()
      */
-    protected $price = 0.0;
+    protected $price = "0.0";
 
     /**
      * @var ?Currency The currency used for the current price information.
@@ -147,11 +147,21 @@ class Pricedetail extends DBElement
      * It is given in current currency and for the price related quantity.
      * @return float
      */
-    public function getPrice() : float
+    public function getPriceFloat() : float
     {
         return (float) $this->price;
     }
 
+    /**
+     * Returns the price associated with this pricedetail.
+     * It is given in current currency and for the price related quantity.
+     * @return string The price as string, like returned raw from DB.
+     */
+    public function getPrice() : string
+    {
+        return $this->price;
+    }
+
     /**
      * Get the price for a single unit in the currency associated with this price detail.
      *

src/Form/Part/PricedetailType.php

@@ -58,7 +58,11 @@ class PricedetailType extends AbstractType
             'measurement_unit' => $options['measurement_unit'],
             'attr' => ['class' => 'form-control-sm']
         ]);
-        $builder->add("price", NumberType::class);
+        $builder->add("price", NumberType::class, [
+            'scale' => 5,
+            'html5' => true,
+            'attr' => ['min' => 0, 'step' => "any"]
+        ]);
         $builder->add("currency", CurrencyEntityType::class, ['required' => false]);
     }