AddRemoveWidget and ComboBoxWidget

AddRemoveWidget permits to add self-entered data, which makes it a good replacement for KeywordWidget. Example code looks like:

from Products.AddRemoveWidget.AddRemoveWidget import AddRemoveWidget

...

  atapi.LinesField(

      'watershed',

      storage=atapi.AnnotationStorage(),

      widget=AddRemoveWidget(

          label=_(u"Watershed"),

          description=_(u"Enter one tag per line, multiple words allowed."),

      ),

      vocabulary_factory='watershed',

  ),

AddRemoveWidget works with multiple-value fileds, if you need just single-value fields, try ComboBoxWidget instead. Example code looks like:

from Products.AddRemoveWidget.ComboBoxWidget import ComboBoxWidget

...



  atapi.StringField(

      'vote',

      storage=atapi.AnnotationStorage(),

      widget=ComboBoxWidget(

          label=_(u"Best Band Ever"),

          description=_(u"Single Choice."),

      ),

      vocabulary=['The Beatles', 'The Smiths', 'Led Zeppelin', 'Joy Division'],

  ),

Look into the source code for more config options.