Make it possible to add extra form row container attributes

src/Resources/views/Form/form_admin_fields.html.twig

@@ -357,7 +357,9 @@ file that was distributed with this source code.
 
 {% block form_row %}
     {% set show_label = show_label ?? true %}
-    <div class="form-group{% if errors|length > 0 %} has-error{% endif %}" id="sonata-ba-field-container-{{ id }}">
+    {% set row_id = 'sonata-ba-field-container-'~id %}
+    {% set row_class = (row_attr.class|default('') ~ ' form-group' ~ ((not compound or force_error|default(false)) and not valid ? ' has-error'))|trim %}
+    <div{% with {attr: row_attr|merge({id: row_id, class: row_class})} %}{{ block('attributes') }}{% endwith %}>
         {% if sonata_admin.field_description.options is defined %}
             {% set label = sonata_admin.field_description.options.name|default(label) %}
         {% endif %}

tests/Form/AdminLayoutTest.php

@@ -74,4 +74,21 @@ public function testErrors(): void
             $expression
         );
     }
+
+    public function testRowAttr(): void
+    {
+        $form = $this->factory->createNamed('name', TextType::class, '', [
+            'row_attr' => [
+                'class' => 'foo',
+                'data-value' => 'bar',
+            ],
+        ]);
+        $view = $form->createView();
+        $html = $this->renderRow($view);
+
+        $this->assertMatchesXpath(
+            $html,
+            '//div[@class="foo form-group"][@data-value="bar"][@id="sonata-ba-field-container-name"]'
+        );
+    }
 }