Make sorting of invoice items reliable.

app/Http/Controllers/Api/InvoiceitemController.php

@@ -32,7 +32,7 @@ class InvoiceitemController extends Controller
             'name' => 'required|string',
             'description' => 'nullable|string',
             'article_number' => 'nullable|string',
-
+            'sort' => 'required|numeric|min:0',
         ]);
 
         $item = $invoice->items()->create($itemData);

app/Models/Invoice.php

@@ -104,7 +104,7 @@ class Invoice extends Model
      */
     public function items(): HasMany
     {
-        return $this->hasMany(Invoiceitem::class);
+        return $this->hasMany(Invoiceitem::class)->orderBy('sort');
     }
 
     /**

app/Models/Invoiceitem.php

@@ -22,6 +22,7 @@ class Invoiceitem extends Model
         'total',
         'name',
         'description',
+        'sort'
     ];
 
 }

database/migrations/2025_08_02_095641_add_sort_to_invoiceitems.php

@@ -0,0 +1,28 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    /**
+     * Run the migrations.
+     */
+    public function up(): void
+    {
+        Schema::table('invoiceitems', function (Blueprint $table) {
+            $table->integer('sort')->default(0)->after('invoice_id');
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::table('invoiceitems', function (Blueprint $table) {
+            $table->dropColumn('sort');
+        });
+    }
+};

resources/views/invoice/create.blade.php

@@ -655,6 +655,7 @@
                 for (let i = 0; i < self.items.length; i++) {
                     let pos = sort_flipped[i];
                     let item = self.items[pos];
+                    item.sort = i;
                     const result = axios.post('invoice/' + self.invoice_id + '/item', item)
                         .catch(function (error) {
                             self.error = true;

resources/views/invoice/edit.blade.php

@@ -662,6 +662,7 @@
                 for (let i = 0; i < self.items.length; i++) {
                     let pos = sort_flipped[i];
                     let item = self.items[pos];
+                    item.sort = i;
                     const result = axios.post('invoice/' + self.invoice.id + '/item', item)
                         .catch(function (error) {
                             self.error = true;