I've searched and not found a z3c.form-widget that can support a source that supports text queries (a la Plone's uberselectionwidget).

The spec is not defined in Zope, but it's basically:

  class IQuerySource(ISource):
      def search(query_string):
          """Return values that matches query."""

In the USW, the widget renders an input field and if applicable, a list of results from which you can make your choice.

I think this widget should live in z3c.widget.



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