Closed
Description
| Q | A |
|---|---|
| Bug report? | yes |
| Feature request? | no |
| BC Break report? | no |
| RFC? | no |
| Symfony version | 4.0 |
$formBuilder
->add('type', ChoiceType::class, [
'required' => false,
'expanded' => true,
'choices' => [1],
'constraints' => new NotBlank()
])
->add('submit', SubmitType::class);{{ form(form) }}Submitting this will produce following HTML
<form name="add" method="post">
<div id="add">
<fieldset class="form-group">
<legend class="col-form-legend">Type</legend>
<div id="add_type">
<div class="form-check">
<label class="form-check-label">
<input type="radio" id="add_type_placeholder" name="add[type]" class="form-check-input is-invalid" value="" checked="checked" /> None
</label>
</div>
<div class="form-check">
<label class="form-check-label">
<input type="radio" id="add_type_0" name="add[type]" class="form-check-input is-invalid" value="1" /> 0
</label>
</div>
</div>
<div class="invalid-feedback">
<ul class="list-unstyled mb-0">
<li>This value should not be blank.</li>
</ul>
</div>
</fieldset>
<div class="form-group">
<button type="submit" id="add_submit" name="add[submit]" class="btn-secondary btn">Submit</button>
</div>
<input type="hidden" id="add__token" name="add[_token]" value="nxWC6qDC59W3-bGZT-TPwsCSLZWGGTwslCSwoJZFJN4" />
</div>
</form>But errors don't show up, because following style from bootstrap 4 is applied
.invalid-feedback {
display: none;
margin-top: .25rem;
font-size: .875rem;
color: #dc3545;
}When expanded option is false, html structure is different and display style will get overridden via following BS4 definition
.form-control.is-invalid ~ .invalid-feedback {
display: block;
}It works ok for BS3 theme.