Customizing Symfony Form Templates

Form errors

Form errors are rendered with a {% form_errors %} block.

Field errors are rendered with a {% field_errors %} block.

Global customization

Create a stand-along template that overrides the form_errors block:

{# app/Resources/views/form_theme.html.twig #}

{% block form_errors %}
	<div class="alert alert-danger alert-form-errors">
{% for error in errors %}
		<div>{{ error.messageTemplate|trans(error.messageParameters, 'validators') }}</div>
{% endfor %}
	</div>
{% endblock %}

</syntaxhighlight>

Update the application configuration:

# app/config/config.yml

# ...

twig:
	form:
		resources:
			- 'form_theme.html.twig'