Pre-populating a BooleanField as checked (WTForms)

Question

For the life of me, I can\'t figure out how to pre-populate a BooleanField with WTForms. I have a field called \"active\". It defaults to being not checked, and it\'s not requ

Answer 1

To have the default boolean value as True, you need to set the default to "checked"

Basic fields Basic fields generally represent scalar data types with single values, and refer to a single input from the form.

class wtforms.fields.BooleanField(default field arguments, false_values=None)

Represents an input type="checkbox". Set the checked-status by using the default-option. Any value for default, e.g. default="checked" puts checked into the html-element and sets the data to True

Source

class QuestionForm(Form):
    question = TextField('Question', [validators.Required()])
    slug = TextField('Slug', [validators.Required()])
    active = BooleanField('Active', default="checked")