Error after update FOF 3.1.3 to 3.3.9

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My component was developed using FOF 3.1.3. Updating any Akeeba component updates FOF and my component views in the backend show the error below. Reverting FOF to 3.1.3 fixes my component but breaks Akeeba views (obvious). Frondend is OK. Do you have any guidelines that I could follow to upgrade my component? I do not know where to start and I have limited time to dedicate to this free open source component.

An error has occurred. 0 Call to a member function getModel() on null Call stack

| Function | Location

1 | () | JROOT/libraries/fof30/Form/Field/Numeric.php:30 2 | FOF30\Form\Field\Numeric->__construct() | JROOT/libraries/fof30/Form/Form.php:650 3 | FOF30\Form\Form->loadType() | JROOT/libraries/fof30/Form/Form.php:589 4 | FOF30\Form\Form->loadFieldType() | JROOT/libraries/fof30/Form/Form.php:932 5 | FOF30\Form\Form->loadField() | JROOT/libraries/joomla/form/form.php:358 6 | JForm->getFieldset() | JROOT/libraries/fof30/Render/AkeebaStrapper.php:819 7 | FOF30\Render\AkeebaStrapper->renderFormBrowse() | JROOT/libraries/fof30/Render/AkeebaStrapper.php:1452 8 | FOF30\Render\AkeebaStrapper->renderForm() | JROOT/libraries/fof30/View/DataView/Form.php:108 9 | FOF30\View\DataView\Form->getRenderedForm() | JROOT/libraries/fof30/View/DataView/Form.php:65 10 | FOF30\View\DataView\Form->display() | JROOT/libraries/fof30/Controller/Controller.php:546 11 | FOF30\Controller\Controller->display() | JROOT/libraries/fof30/Controller/DataController.php:432 12 | FOF30\Controller\DataController->browse() | JROOT/libraries/fof30/Controller/Controller.php:410 13 | FOF30\Controller\Controller->execute() | JROOT/libraries/fof30/Controller/DataController.php:158 14 | FOF30\Controller\DataController->execute() | JROOT/libraries/fof30/Dispatcher/Dispatcher.php:175 15 | FOF30\Dispatcher\Dispatcher->dispatch() | JROOT/administrator/components/com_gscrm/gscrm.php:17 16 | require_once() | JROOT/libraries/cms/component/helper.php:389 17 | JComponentHelper::executeComponent() | JROOT/libraries/cms/component/helper.php:364 18 | JComponentHelper::renderComponent() | JROOT/libraries/cms/application/administrator.php:98 19 | JApplicationAdministrator->dispatch() | JROOT/libraries/cms/application/administrator.php:156 20 | JApplicationAdministrator->doExecute() | JROOT/libraries/cms/application/cms.php:265 21 | JApplicationCms->execute() | JROOT/administrator/index.php:51

[nikosdion]

Change all fields of type=“numeric” to type=“number”. This is documented in the changelog and the wiki. It’s a change required for working with PHP 7.2 and later.

[go-source]

Thank you. I had read the Numeric to Number issue. However, I changed only one view to test and it did not work, then I asked the question. Now, after replacing all places and views, it works fine.