Extract WTForms classes from jinja templates
pip install jinja-wtforms
from jinja2 import Environment, FileSystemLoader
env = Environment(loader=FileSystemLoader('templates'))
env.add_extension('jinja_wtforms.WtformExtension')Defining forms is almost like using a pre-defined form but with added information on the type of the field.
To do so, you'll need to call a method named after the type of the field on each
field. So if you want to define a "firstname" field as a text field, you can
do form.firstname.text().
Let's define a signup form:
<form action="" method="post">
{{ form.csrf_token() }}
<p><label>First name</label> {{ form.firstname.text() }}</p>
<p><label>Last name</label> {{ form.lastname.text() }}</p>
<p><label>Email</label> {{ form.email.email() }}</p>
<p><label>Password</label> {{ form.password.password() }}</p>
</form>
The optional parameters of the field definition functions are:
- label: the field's label (can also be define as the first argument)
- description: the field's description
- placeholder: the field's placeholder
- required: boolean, default false
- optional: boolean, default false
- range: a tuple of (min, max), value should be a number in the range
- length: a tuple of (min, max), value should be of string of length in the range
- validators: a list of validator names from
wtforms.validators
Available field types and their actual class:
- checkbox:
wtforms.fields.BooleanField - decimal:
wtforms.fields.DecimalField - date:
wtforms.fields.DateField - datetime:
wtforms.fields.DateTimeField - float:
wtforms.fields.FloatField - int:
wtforms.fields.IntegerField - radio:
wtforms.fields.RadioField - select:
wtforms.fields.SelectField - selectmulti:
wtforms.fields.SelectMultipleField - text:
wtforms.fields.StringField - textarea:
wtforms.fields.TextAreaField - password:
wtforms.fields.PasswordField - upload:
wtforms.fields.FileField - hidden:
wtforms.fields.HiddenField - datetimelocal:
wtforms.fields.DateTimeLocalField - decimalrange:
wtforms.fields.DecimalRangeField - email:
wtforms.fields.EmailField - intrange:
wtforms.fields.IntegerRangeField - search:
wtforms.fields.SearchField - tel:
wtforms.fields.TelField - url:
wtforms.fields.URLField
Use the form registry available through the forms property of the environment:
form_class = env.forms["form.html"].form # where form.html is the template filename containing the form definition
form = form_class()