使用wtforms动态添加输入字段

WTForms有一个称为的元字段

FormField

FieldList

class AddressEntryForm(FlaskForm):    name = StringField()class AddressesForm(FlaskForm):    """A form for one or more addresses"""    addresses = FieldList(FormField(AddressEntryForm), min_entries=1)

要在AddressesForm中创建条目，只需使用词典列表：

user_addresses = [{"name": "First Address"},       {"name": "Second Address"}]form = AddressesForm(addresses=user_addresses)return render_template("edit.html", form=form)

然后，在您的模板中，只需遍历子表单：

{% from 'your_form_template.jinja' import forms %}{% for address_entry_form in form.addresses %}    {{ address_entry_form.hidden_tag() }}    {# Flask-WTF needs `hidden_tag()` so CSRF works for each form #}    {{ forms.render_field(address_entry_form.name) }}{% endfor %}

WTForms会自动正确地为名称和ID加上前缀，因此，当您将数据回发时，您将能够获取

form.addresses.data