Introduction

pysform is a library designed to facilitate the rendering/processing/validating of HTML forms.

Features

• validation based on FormEncode

• attempting to have complete HTML spec coverage

• extensible rendering system() (don’t have to use it)

• will work with multiple WSGI frameworks (Werkzeug currently supported)

• extensive unit tests

• few dependencies: FormEncode, pysutils, WebHelpers

Code Sample

Using it might look like this:

class MyForm(Form):
    def __init__(self):
        Form.__init__(self, 'myform')

        el = self.add_header('input-els', 'Optional Elements')
        el = self.add_button('button', 'Button', defaultval='PushMe')
        el = self.add_checkbox('checkbox', 'Checkbox')
        el = self.add_file('file', 'File')
        el = self.add_hidden('hidden', defaultval='my hidden val')
        el = self.add_image('image', 'Image', defaultval='my image val', src='images/icons/b_edit.png')
        el = self.add_text('text', 'Text')
        el.add_note('a note')
        el.add_note('an <strong>HTML</strong> note', False)
        el = self.add_text('nolabel', defaultval='No Label')
        el.add_note('a note')
        el = self.add_password('password', 'Password')
        el = self.add_confirm('confirm', 'Confirm Password', match='password')
        el.add_note('confirm characters for password field are automatically masked')
        el = self.add_date('date', 'Date', defaultval=datetime.date(2009, 12, 3))
        el.add_note('note the automatic conversion from datetime object')
        emel = self.add_email('email', 'Email')
        el = self.add_confirm('confirmeml', 'Confirm Email', match=emel)
        el.add_note('note you can confirm with the name of the field or the element object')
        el.add_note('when not confirming password field, characters are not masked')
        el = self.add_time('time', 'Time')
        el = self.add_url('url', 'URL')
        options = [('1', 'one'), ('2','two')]
        el = self.add_select('select', options, 'Select')
        el = self.add_mselect('mselect', options, 'Multi Select')
        el = self.add_textarea('textarea', 'Text Area')
        el = self.add_fixed('fixed', 'Fixed', 'fixed val')
        el = self.add_fixed('fixed-no-label', defaultval = 'fixed no label')
        el = self.add_static('static', 'Static', 'static val')
        el = self.add_static('static-no-label', defaultval='static val no label')

and the view/controller code might look something like:

class FormTest(HtmlTemplatePage):
    def prep(self):
        self.form = MyForm()

    def post(self):
        if self.form.is_cancel():
            self.assign('cancel', True)
        elif self.form.is_valid():
            self.assign('values', self.form.get_values())
        elif self.form.is_submitted():
            # form was submitted, but invalid
            self.form.assign_user_errors()
        self.default()

    def default(self):
        self.assign('form', self.form)

Questions & Comments

Please visit: http://groups.google.com/group/pyslibs

Current Status

The code stays pretty stable, but the API is likely to change in the future.

The pysform tip is installable via easy_install with easy_install pysform==dev