CheckboxInput does not display "this field is required" error

[XeonZenn]

Update this method to fix it.

    def get_checkbox_classes(self):
        """Return CSS classes for checkbox."""
        classes = ["form-check"]
        if self.checkbox_style == "switch":
            classes.append("form-switch")
        if self.checkbox_layout == "inline":
            classes.append("form-check-inline")
        if self.field_errors:
            classes.append(self.error_css_class)
        elif self.field.form.is_bound:
            classes.append(self.success_css_class)
        return merge_css_classes(*classes)

if it was me, I would add a method like this to make getting valid/invalid easier:

    def get_valid(self):
        if self.field_errors:
            return self.error_css_class
        elif self.field.form.is_bound:
            return self.success_css_class
        return None # or return '' for concatenation

[dyve]

That's not all there is to it, the error message also has to go inside the form--check class.

See https://getbootstrap.com/docs/5.0/forms/validation/#server-side

<div class="form-check">
    <input class="form-check-input is-invalid" type="checkbox" value="" id="invalidCheck3" aria-describedby="invalidCheck3Feedback" required>
    <label class="form-check-label" for="invalidCheck3">Agree to terms and conditions</label>
    <div id="invalidCheck3Feedback" class="invalid-feedback">You must agree before submitting.</div>
</div>

[XeonZenn]

Recent change fixed issue, Good Job!