CodeIgniter 3 to 4 Upgrade Helper

@GreTaurus Implement the feature and send a pull request.

Or you can manually upgrade only the class that is using group_start() to CI4.
See https://codeigniter4.github.io/CodeIgnit...y-grouping

You are already using CI4, so you can use it without the upgrade helper.
The upgrade helper is just a wrapper for CI4.

Sorry for dump question but i have a code 
$this->db->count_all_results('cms_news');
and get a errorr
Call to undefined method Kenjis\CI3Compatible\Database\CI_DB::count_all_results() 

How can i use countAllResults like CI4 . If your helper doesn't have that function, how can i extend it? . Can i use both CI3 and CI4 syntax in the same model ?

How can i use countAllResults like CI4 .

Please write your code according to CI4 syntax without using the upgrade helper feature at all.

If your helper doesn't have that function, how can i extend it?

You cannot extend it. Create your fork project and add code.

Can i use both CI3 and CI4 syntax in the same model ?

No.

ci-phpunit-test | CodeIgniter Testing Guide | CodeIgniter 3 to 4 Upgrade Helper

How can i use countAllResults like CI4 .

Please write your code according to CI4 syntax without using the upgrade helper feature at all.

If your helper doesn't have that function, how can i extend it?

You cannot extend it. Create your fork project and add code.

Can i use both CI3 and CI4 syntax in the same model ?

No.

Thank you for your reply. There is no way to inherit or extend it without forking the project. I just want to add or modify if there is a missing function in a simple way

If you can send Pull Requests, feel free to send.

ci-phpunit-test | CodeIgniter Testing Guide | CodeIgniter 3 to 4 Upgrade Helper

If you can send Pull Requests, feel free to send.

Sorry I encountered a rather strange bug $this->form_validation->run() always returns false I tried $this->form_validation->error_array() but didn't see any rules violation

If you can send Pull Requests, feel free to send.

Sorry I encountered a strange bug when $this->form_validation->run() always returns false.
I tried $this->form_validation->error_array() but didn't see any rules violation

can you add "or_like" and "group_start" , "group_end" convert function to CI_DB_query_builder ? i think it's pretty easy but i don't know if there is currently any way to support these functions in the model