Change filtering of scalars prior to validation

app/DataMapper/BaseSettings.php

@@ -30,16 +30,16 @@ class BaseSettings
         switch ($key) {
             case 'int':
             case 'integer':
-                return (int) $value;
+                return is_scalar($value) ? (int) $value : 0;
             case 'real':
             case 'float':
             case 'double':
-                return (float) $value;
+                return is_scalar($value) ? (float) $value : 0;
             case 'string':
-                return is_null($value) ? '' : (string) $value;
+                return is_scalar($value) ? (string) $value : '';
             case 'bool':
             case 'boolean':
-                return boolval($value);
+                return is_scalar($value) ? boolval($value) : false;
             case 'object':
                 return json_decode($value);
             case 'array':

tests/Feature/InvoiceTest.php

@@ -52,6 +52,51 @@ class InvoiceTest extends TestCase
         $this->makeTestData();
     }
 
+
+    public function testLineItemValidation()
+    {
+
+        $line_items = [];
+
+        $item = new \stdClass();
+        $item->quantity = 1;
+        $item->cost = 100000000;
+        $item->type_id = '1';
+        $item->tax_name1 = ['tax_name1'];
+        $item->tax_rate1 = 10;
+        $item->tax_name2 = 'tax_name2';
+        $item->tax_rate2 = 10;
+        $item->tax_name3 = 'tax_name3';
+        $item->tax_rate3 = 10;
+
+        $line_items[] = $item;
+
+        $data = [
+            'status_id' => 1,
+            'number' => '',
+            'discount' => 0,
+            'is_amount_discount' => 1,
+            'po_number' => '3434343',
+            'public_notes' => 'notes',
+            'is_deleted' => 0,
+            'custom_value1' => 0,
+            'custom_value2' => 0,
+            'custom_value3' => 0,
+            'custom_value4' => 0,
+            'client_id' => $this->client->hashed_id,
+            'line_items' => $line_items,
+        ];
+
+        $response = $this->withHeaders([
+            'X-API-SECRET' => config('ninja.api_secret'),
+            'X-API-TOKEN' => $this->token,
+        ])->postJson('/api/v1/invoices?mark_sent=true', $data)
+            ->assertStatus(200);
+
+        $arr = $response->json();
+
+    }
+
     public function testMaxDiscount()
     {