Change Widget in View

Plone Support Add-on Development
1

I am using a RelationChoice field as follows:

    directives.widget("field_name", SelectFieldWidget)
    field_name = RelationChoice(
        title="Field Name",
        vocabulary="someVocabularyName",
        required=False,
    )

And I use the SelectFieldWidget for the Add and Edit forms. However, for the display or browser view, I want to use another widget which will render the value with a link to the target. I tried using the updateWidgets method below but it does not work.

from plone.dexterity.browser.view import DefaultView


class ItemView(DefaultView):

    def updateWidgets(self, prefix=None):
        super().updateWidgets()
        self.fields["field_name"].widgetFactory = RelatedItemsFieldWidget

Using pdb and setting the widgetFactory, the field still uses the SelectFieldWidget.

(Pdb++) self.fields['field_name'].widgetFactory
{'display': ParameterizedWidget(<function SelectFieldWidget at 0x75122720c9a0>, {})}

In my template, I am calling the widget via:

<span tal:replace="structure widget/@@ploneform-render-widget" />

What is a way to change the widget in a browser view?

2

Does it matter if you update it in fields instead ?

def updateFields(self):
3

Thanks! This led me to the not so obvious error:

self.fields.....

It is supposed to be:

self.widgets["field_name"].widgetFactory = RelatedItemsFieldWidget
4

I spoke too soon. While I can now set the widgetFactory to be a RelatedItemsFieldWidget. The template still renders the SelectFieldWidget display template. I also tried updateFields() but it was not called by the view so I can not set the widgetFactory from there.

5

use the raw value and create an instance of the widget with that value. Or import the new widget template and use it directly.

6

Thank you for your suggestion. I actually had a work around via my custom view template already. However, I have several views that needs the same. I wanted a lazy solution. Using the display view of the RelatedItemsFieldWidget is also not the ideal solution for me so I just opted to create a custom widget instead of using different ones.

1 Like