Plone 5 portlets are expected to use z3c.form, while in Plone<=4 portlets have been using formlib.
Given this change you may find error like this:
2014-12-03 14:59:42 ERROR Zope.SiteErrorLog 1417615182.70.607391088835 http://localhost:8080/Plone/++contextportlets++plone.rightcolumn/+/example.portlet Traceback (innermost last): Module ZPublisher.Publish, line 138, in publish Module ZPublisher.mapply, line 77, in mapply Module ZPublisher.Publish, line 48, in call_object Module plone.app.portlets.browser.formhelper, line 59, in __call__ Module z3c.form.form, line 218, in __call__ Module plone.z3cform.fieldsets.extensible, line 58, in update Module plone.autoform.form, line 33, in updateFields Module plone.autoform.base, line 54, in updateFieldsFromSchemata Module plone.autoform.form, line 22, in schema NotImplementedError: The class deriving from AutoExtensibleForm must have a 'schema' property
The reason is that the add and edit form classes for the portlets are expected to have an attribute called
schema that should be equal to the interface defining the portlet fields. In Plone<=4 that interfaced was used to fill an attribute called
The easiest way to support both Plone 5 and Plone<=4, is just to add a
schema class attribute equal to the interface you are using:
class AddForm(base.AddForm): + schema = IExamplePortlet form_fields = form.Fields(IExamplePortlet) def create(self, data): return Assignment(**data) class EditForm(base.EditForm): + schema = IExamplePortlet form_fields = form.Fields(IExamplePortlet)
In many cases this is all you have to do. If you run in other troubles please leave a comment and will try to update this post.
If you want your code to behave differently according to the Plone version you are using, you may want to use the utility function
getFSVersionTuple to check for the running version of Plone. You can start from this example
+from Products.CMFPlone.utils import getFSVersionTuple + +PLONE4 = getFSVersionTuple() <= 4 + class AddForm(base.AddForm): - form_fields = form.Fields(IExamplePortlet) + if PLONE4: + form_fields = form.Fields(IExamplePortlet) + else: + schema = IExamplePortlet def create(self, data): return Assignment(**data) class EditForm(base.EditForm): - form_fields = form.Fields(IExamplePortlet) + if PLONE4: + form_fields = form.Fields(IExamplePortlet) + else: + schema = IExamplePortlet