Joomla Developer Manual

Starting with Joomla 4.0 we changed / removed and added some options to the core extensions that might affect template providers.

Errors reported¶

Some options have been removed or changed in comparision to 3.x

Versions affected¶

General Information

This pertains only to Joomla! version(s): 4.0.0+

What is the cause¶

This is an expected behavior as of Joomla 4.0

The following options has been changed comparing the current 3.10-dev vs. 4.0-dev (as of 09.09.2020):

    com_config/config/default:
      Fields added in J4:
        request/request/controller

    com_config/templates/default:
      Fields added in J4:
        request/request/controller

    com_contact/categories/default:
      Fields removed in J4:
        params/contact/presentation_style

    com_contact/category/default:
      Fields added in J4:
        params/advanced/contacts_display_num
      Fields removed in J4:
        params/contact/presentation_style

    com_contact/contact/default:
      Fields removed in J4:
        params/params/presentation_style

    com_contact/featured/default:
      Fields removed in J4:
        params/contact/presentation_style

    com_content/article/default:
      Fields removed in J4:
        params/basic/show_icons
        params/basic/show_print_icon
        params/basic/show_email_icon

    com_content/categories/default:
      Fields removed in J4:
        params/blog/num_columns
        params/blog/multi_column_order
        params/article/show_icons
        params/article/show_print_icon
        params/article/show_email_icon

    com_content/category/blog:
      Fields added in J4:
        params/advanced/blog_class_leading
        params/advanced/blog_class
      Fields removed in J4:
        params/advanced/bloglayout
        params/advanced/num_columns
        params/advanced/multi_column_order
        params/article/show_icons
        params/article/show_print_icon
        params/article/show_email_icon

    com_content/category/default:
      Fields removed in J4:
        params/article/show_icons
        params/article/show_print_icon
        params/article/show_email_icon

    com_content/featured/default:
      Fields added in J4:
        params/advanced/blog_class_leading
        params/advanced/blog_class
      Fields removed in J4:
        params/advanced/num_columns
        params/advanced/multi_column_order
        params/article/show_icons
        params/article/show_print_icon
        params/article/show_email_icon

    com_finder/search/default:
      Fields added in J4:
        params/basic/show_taxonomy
        params/basic/show_date

How to fix¶

When you have a template that supports both 3.x and 4.x please make sure that you take care of the changed parameter set.