z3c.preference 0.1.1

Using z3c.preference

There are some preconditions to use z3c.preference:

• The views for the ++preferences++ namespace are registered for the layer z3c.preference.interfaces.IPreferenceLayer. So you have to add this interface to the browser layer of your application.

• Only users having the permission z3c.preference.EditPreference are allowed to access the the preference views. So you have to add this permission to the users resp. roles which should be able to access the preferences views.

Set up for tests

At first we have to define a preference interface:

>>> import zope.interface
>>> import zope.schema
>>> class IBackEndSettings(zope.interface.Interface):
...     """Backend User Preferences"""
...
...     email = zope.schema.TextLine(
...         title=u"E-mail Address",
...         description=u"E-mail address used to send notifications")
...
...     skin = zope.schema.Choice(
...         title=u"Skin",
...         description=u"The skin that should be used for the back end.",
...         values=['Hipp', 'Lame', 'Basic'],
...         default='Basic')
...
...     showLogo = zope.schema.Bool(
...         title=u"Show Logo",
...         description=u"Specifies whether the logo should be displayed.",
...         default=True)

The interface must be registered for preferenes:

>>> from zope.configuration import xmlconfig
>>> import zope.preference
>>> context = xmlconfig.file('meta.zcml', zope.preference)

>>> context = xmlconfig.string('''
...     <configure
...         xmlns="http://namespaces.zope.org/zope"
...         i18n_domain="test">
...
...       <preferenceGroup
...           id="BackEndSettings"
...           title="Back End Settings"
...           schema="z3c.preference.README.IBackEndSettings"
...           category="true"
...           />
...
...     </configure>''', context)

To access the forms a browser is needed, the user must be autorized as the preferences are stored in the principal annotations:

>>> from zope.app.wsgi.testlayer import Browser
>>> browser = Browser()
>>> browser.addHeader('Authorization', 'Basic mgr:mgrpw')

Editing preferences

There is a name space to access the preferences. On the page a form is displayed which show the default values:

>>> browser.open('http://localhost/++preferences++/BackEndSettings')
>>> browser.getControl('E-mail Address').value
''
>>> browser.getControl('Skin').displayValue
['Basic']
>>> browser.getControl('yes').selected
True
>>> browser.getControl('no').selected
False

The values can be changed and submitting the form makes them persistent:

>>> browser.getControl('E-mail Address').value = 'me@example.com'
>>> browser.getControl('Skin').displayValue = ['Hipp']
>>> browser.getControl('no').click()
>>> browser.getControl('Apply').click()

After submitting the form gets displayed again and shown the changed values:

>>> 'Data successfully updated.' in browser.contents
True
>>> browser.getControl('E-mail Address').value
'me@example.com'
>>> browser.getControl('Skin').displayValue
['Hipp']
>>> browser.getControl('no').selected
True

0.1.1 (2010-07-17)

• Documented preconditions to use this package, see Using z3c.preference.

0.1.0 (2010-07-10)

• Initial Release.