html_params and class and class_

[xyzones]

Hello,

I have a form created with model_form of flask_mongoengine.wtf

    field_args = {
      'bio': {'render_kw':{'class_':"summernote"}},
    }
    exclude = ['created_at','created_by']
    form = model_form(Author,exclude=exclude,field_args=field_args)

I have a HTML

 {{ field(class='form-control', **kwargs) }}

for which the TextArea widget correctly outputs

<textarea class="form-control" class="summernote" id="bio" name="bio">text</textarea>

However all browsers are removing the extra class tag. It would be good to rewrite the html_params so that multiple class tags are combined into one.

expected output:

<textarea class="form-control summernote" id="bio" name="bio">text</textarea>

I am using

Package	Version
Flask	1.0.2
Flask-WTF	0.14.2
flask-mongoengine	0.9.5
WTForms	2.2.1

Thanks,

[davidism]

For flexibility, we'd have to allow names further down the line override the value, rather than combining, so that you can replace values rather than just append.

[azmeuk]

I could reproduce with:

>>> import wtforms

>>> class F(wtforms.Form): 
...     foo = wtforms.StringField(render_kw={'class_':'summernote'})

>>> F().foo(**{"class": "form-control"})
Markup('<input class="form-control" class="summernote" id="foo" name="foo" type="text" value="">')

@davidism are you saying that form-control should override summernote?

[davidism]

I think that's what I meant, yes. Do any normalization then overwrite existing keys.