Module appears not to uninstall cleanly

[burkmarr]

I found that if I uninstalled the iForm module and later attempted to reinstall it again, it failed. The consequence was that there was no way then to install and use the iForm module on that site. I then reproduced the problem like this:

• Clone https://github.com/ricardoamaro/drupal9-docker-app
• cd drupal9-docker-app
• Run ./drupal9_local.sh
• Use composer to include the jquery_ui and jquery_ui_tabs modules
• Clone https://github.com/Indicia-Team/drupal-8-module-iform into web/modules/custom
• Go to local instance (172.17.0.2) and login as admin
• From extensions, install the jquery_ui & jquery_ui_tabs modules
• Install the iform module
• Uninstall the module
• Try to install the module again – it fails

The error message:

[BirenRathod]

@burkmarr At the time of new install iform module, it creates those fields and entities in core.extensions. At the time of uninstall it doesn't remove those from core.extensions. Due to that, it shows above error. I mentioned this to @johnvanbreda while ago. I don't know @johnvanbreda has got any plan to resolve it.

The solution is, remove those entities from config table manually if you can access the database.

[johnvanbreda]

@BirenRathod I won't have time to look into this for a while unfortunately. However, I thought that because node.type.iform_page (and other things mentioned here) are installed via the yaml files in config/install, that Drupal was supposed to automatically uninstall them when you uninstall the module.