Customize widget for a form in ModelView in flask-admin

Question

I have a model News :

class News(db.Model):
    __tablename__ = 'news'
    id = db.Column(db.Integer, primary_key=True)
    content = db.Column(db.String)
    active_from = db.Column(db.DateTime)
    active_until = db.Column(db.DateTime)

which gets integrated into flask-admin like so:

class MyModelView(ModelView):
    def is_accessible(self):
        return current_user.usergroup.name == 'admin'

admin.add_view(MyModelView(News, db.session))

but when I open my admin page I see an input type='text' widget for news.content . How can I put a textarea there instead?

Answer 1

In the code, db.String columns are mapped to StringFields, and db.Text columns are mapped to TextAreaFields, which present the user with text inputs and textareas , respectively.

To overwrite this behavior, you can set the form_overrides field:

from wtforms.fields import TextAreaField

class MyModelView(ModelView):
    form_overrides = dict(string=TextAreaField)
    def is_accessible(self):
        return current_user.usergroup.name == 'admin'