collective.examples.userdata 2.1

Showcase for the new (Plone 4) plone.app.users IUserDataSchema. Shows how to extend the user data fields that can be selected for the registration form.

Introduction

With Plone 5, the registration and personal information forms are z3c.form forms. These can be extended to allow any additional data to be collected on the forms.

This product aims to show how you could extend or modify the default schema provided by plone.app.users, and add new fields to the registration form.

If you are using a Plone version previous to Plone 5, then you need to look at the older version of collective.examples.userdata here.

Note for upgraders

Previously, your IEnhancedUserDataSchema was registered via. a IUserDataSchemaProvider utility you registered in componentregistry.xml. If this is something you did, then be sure to remove this utility, ideally before upgrading. wildcard.fixpersistentutilities could help here.

Adding custom userdata fields

The code below is snippets from the source code from the package. Look there to see more examples.

Creating a schema

We create a schema for our fields in the same manner as any other schema:

class IEnhancedUserDataSchema(model.Schema):
    country = schema.TextLine(
        title=_(u'label_country', default=u'Country'),
        description=_(u'help_country',
                      default=u"Fill in the country you live in."),
        required=False,
        )

Extending the userdata form

To add this schema to the form, we need to define a form extender for UserDataPanel which allows us to register any new fields we want to:

class UserDataPanelExtender(extensible.FormExtender):
    adapts(Interface, IDefaultBrowserLayer, UserDataPanel)
    def update(self):
        fields = field.Fields(IEnhancedUserDataSchema)
        fields = fields.omit('accept') # Users have already accepted.
        self.add(fields)

And register this in configure.zcml:

<adapter
  factory=".userdataschema.UserDataPanelExtender"
  provides="plone.z3cform.fieldsets.interfaces.IFormExtender" />

Storing / retrieving custom fields

To store the values alongside default fields, we need to add fields to profiles/default/memberdata_properties.xml. For example:

<?xml version="1.0"?>
<object name="portal_memberdata" meta_type="Plone Memberdata Tool">
  <property name="country" type="string"></property>
</object>

We don’t define the “accept” field here, since that is only for signup. They have to have accepted to have a user in the system.

Before values can be read and written by the form, there needs to be a data manager to fetch the values. The default manager will read/write any field defined in the schema, so most of the work is done for you:

from plone.app.users.browser.account import AccountPanelSchemaAdapter

class EnhancedUserDataSchemaAdapter(AccountPanelSchemaAdapter):
    schema = IEnhancedUserDataSchema

If you want to do something different, add a property for that field to override the default behavior. The source code shows this for the birthdate field.

Finally, register the data manager in ZCML:

<adapter
  provides=".userdataschema.IEnhancedUserDataSchema"
  for="plone.app.layout.navigation.interfaces.INavigationRoot"
  factory=".adapter.EnhancedUserDataSchemaAdapter"
  />

Extending the registration form

To extend the registration form, you have 2 choices. Either using the @@member-registration view to manipulate which of the default fields are visible, or for full control you can register another form extender.

Defining registration field FormExtenders

Registering an extender for BaseRegistrationForm will allow us to add fields at any point to the registration form. This is done in the same way as before:

class RegistrationPanelExtender(extensible.FormExtender):
    adapts(Interface, IDefaultBrowserLayer, BaseRegistrationForm)
    def update(self):
        fields = field.Fields(IEnhancedUserDataSchema)
        #NB: Not omitting the accept field this time, we want people to check it
        self.add(fields)

And register this in configure.zcml:

<adapter
  factory=".userdataschema.RegistrationPanelExtender"
  provides="plone.z3cform.fieldsets.interfaces.IFormExtender" />

The data manager is attached to the schema, so will be shared with the user data form. If we used a different schema, then we would have to define another data manager too.

Various other field examples

There are various other extra fields with which you could extend your users’ profile. In userdataschema.py you will find examples for:

• a Date field (birthdate)

• a Boolean field (newsletter)

• a Choice field (gender)

The “Accept Terms” field

A special case is the accept field. This is a Boolean field which is required for signup. We implement it by adding a constraint to the schema:

def validateAccept(value):
    if not value == True:
        return False
    return True

class IEnhancedUserDataSchema(IUserDataSchema):
    # ...
    accept = schema.Bool(
        title=_(u'label_accept', default=u'Accept terms of use'),
        description=_(u'help_accept',
                      default=u"Tick this box to indicate that you have found,"
                      " read and accepted the terms of use for this site. "),
        required=True,
        constraint=validateAccept,
        )

Because this field can be ignored once registration is complete, we don’t add it to the memberdata properties. We also hide it from the userdata forms.

Changelog

2.1 (2014-07-03)

• Fix broken setup.py so we generate documentation & install properly again. [lentinj]

2.0 (2014-07-03)

• Convert to show customisation of z3c.form-based plone.app.users. [lentinj, vipod, thet]

0.5 (unreleased)

• Nothing changed yet.

0.4 (2013-12-18)

• Fix gender vocabulary and translate it properly. (thet)

• Dont’ overwrite existing user registration fields, just add accept and country. (thet)

• Add field “birthyear” for use cases where asking for the exact birth date is too much. (thet)

• Using locales directory instead of i18n and general cleanup. (thet)

• Moved to github (Kees Hink)

• Added German translation (Pavel Bogdanovic, 2011-10-28).

0.3 (2010-09-26)

• Make the custom fields available only when the product is installed through Generic Setup, by overriding the utility in componentregistry.xml (Elizabeth Leddy).

• Added a metadata.xml with a profile version.

0.2 (2010-04-12)

• Override plone.app.users’ adapter class, so @@personal-information will show the extra fields defined in this product. This requires plone.app.users >= 1.0b7.

0.1 (2010-02-28)

• Initial release

To do

• Uninstalling the product currently breaks the site. An uninstall step should be added to take the fields that the product added out of the ZMI’s user properties.