django-crispy提交css_class

Question

I'm using django-crispy to render forms for a project and I'm using bootstrap as the CSS framework. I have the following coding

self.helper.layout = Layout(
        Fieldset(
            '',
            'username',
            'password',
        ),
        ButtonHolder(
            Submit('signin', 'Sign in', css_class='btn btn-default')
            )
        )

But in the HTML is rendered as

<div class="buttonHolder"><input type="submit" name="signin" value="Sign in" class="btn btn-primary btn btn-default" id="submit-id-signin"/></div>

Note that the class is "btn btn-primary btn btn-default" when I want "btn btn-default"

Any ideas why this is happening? Thanks

Answer 1

Try this:

ButtonHolder(
        Submit('signin', 'Sign in'),
        css_class='btn btn-link'
    )