Magento 2: developer mode breaks magento command line

Question

Right after installing magento, (2.3.2), I run

bin/magento deploy:mode:set developer

to enable developer mode. I remember when I had done before without setting this flag, the instance worked fine.

This command succeeded, but right after that, I am not even able to run any of the Magento commands.

Even the command to know the current status fails

>bin/magento deploy:mode:show 
Class Magento\Framework\App\ResourceConnection\Proxy does not exist

(since magento command itself is broken, di:compile or even turning off the developer mode will fail).

I could salvage the situation by copying the generated files from my another instance. But I am not sure why this happens and how to force it to regenerate the generated files.

Answer 1

Run below commands from the Magento root terminal

cd <your Magento install directory>/var
rm -rf cache/* di/* generation/* page_cache/*
chmod -R 777 var/ pub/ generated/

Also, run the below commands from terminal:

php bin/magento setup:upgrade
php bin/magento setup:di:compile
php bin/magento cache:flush
chmod -R 777 var/ pub/ generated/

Hope it helps!!!

• melchi: I deleted them, but still bin/magento deploy:mode:show is not working.
• Sumit: Give permission to var, pub and generated folder with this command "chmod -R 777 var/ pub/ generated/"
• melchi: thanks sumit, yes, I did that too. Setting to developer mode clearly deletes the generated folder, which seems to be needed for the magento tool itself to work.
• Sumit: Yes, you need to run the deployment commands again to make it work. I've updated my answer for the same.
• Ben Crook: This is what I meant @melchi - I've deleted my answer as Sumit's explains it better :P