Introduction

Since Plone 4, the registration form for new users is a Zope formlib form, defined in plone.app.users. plone.app.users allows the site administrator to select fields from this schema to appear on the registration form.

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.

How it works

Overriding the default schema

The default schema is defined in plone.app.users, and is provided by a utility. We override this utility in the file profiles/default/componentregistry.xml:

<utility
  interface="plone.app.users.userdataschema.IUserDataSchemaProvider"
  factory="collective.examples.userdata.userdataschema.UserDataSchemaProvider"

Our userdataschema.py contains:

from plone.app.users.userdataschema import IUserDataSchemaProvider

class UserDataSchemaProvider(object):
    implements(IUserDataSchemaProvider)

    def getSchema(self):
        """
        """
        return IEnhancedUserDataSchema

And, also in userdataschema.py, we subclass the default schema:

from plone.app.users.userdataschema import IUserDataSchema

class IEnhancedUserDataSchema(IUserDataSchema):
    """ Use all the fields from the default user data schema, and add various
    extra fields.
    """

Adding fields to the schema

The "Country" field

We can now add a schema field to our schema class:

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

Various other fields

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 (see below).

Adding fields to the memberdata properties

In profiles/default/memberdata_properties.xml, we add the fields that we want to store as properties on the member. These are all the fields we defined, except the "accept" field, which is wanted only for signup.

Default settings for registration fields

We can automatically select some fields to go on the registration form. The fields we define in profiles/default/propertiestool.xml will be on the form once the product is installed.

Of course, the site manager can modify this after installation.

Making added fields available on the Personal Information form

In order to see these properties in the Personal Information form (@@personal-information), we need to take a few extra steps. We have to override the default adapter which adapts a user object to a form. See the plone.app.controlpanel documentation for a detailed explanation.

To override plone.app.users' default adapter, we put this in overrides.zcml:

<adapter
  provides=".userdataschema.IHejaSverigeUserDataSchema"
  for="Products.CMFCore.interfaces.ISiteRoot"
  factory=".adapter.HejaSverigeUserDataPanelAdapter"
  />

In adapter.py, we repeat (yes, this is unfortunate) the fields we defined in the schema. For example, for the firstname field, we do this:

class HejaSverigeUserDataPanelAdapter(UserDataPanelAdapter):
    """
    """
    def get_firstname(self):
        return self.context.getProperty('firstname', '')
    def set_firstname(self, value):
        return self.context.setMemberProperties({'firstname': value})
    firstname = property(get_firstname, set_firstname)