fix: quantity validation should not count current transaction

app/Http/Requests/TransactionRequest.php

@@ -39,7 +39,8 @@ class TransactionRequest extends FormRequest
                     $this->input('portfolio'),
                     $this->requestOrModelValue('symbol', 'transaction'),
                     $this->requestOrModelValue('transaction_type', 'transaction'),
-                    $this->requestOrModelValue('date', 'transaction')
+                    $this->requestOrModelValue('date', 'transaction'),
+                    $this->transaction
                 ),
             ],
             'currency' => ['required', 'exists:currencies,currency'],

app/Rules/QuantityValidationRule.php

@@ -6,8 +6,8 @@ namespace App\Rules;
 
 use App\Models\Portfolio;
 use App\Models\Transaction;
-use Illuminate\Support\Carbon;
 use Illuminate\Contracts\Validation\ValidationRule;
+use Illuminate\Support\Carbon;
 
 class QuantityValidationRule implements ValidationRule
 {
@@ -20,8 +20,9 @@ class QuantityValidationRule implements ValidationRule
         protected ?Portfolio $portfolio,
         protected ?string $symbol,
         protected ?string $transactionType,
-        protected string|Carbon|null $date
-    ) { }
+        protected string|Carbon|null $date,
+        protected ?Transaction $transaction
+    ) {}
 
     /**
      * Validate the attribute.
@@ -42,6 +43,7 @@ class QuantityValidationRule implements ValidationRule
                 ->sum('quantity');
 
             $sales_qty = (float) $this->portfolio->transactions()
+                ->where('id', '!=', $this->transaction?->id)
                 ->symbol($this->symbol)
                 ->sell()
                 ->whereDate('date', '<', $this->date)