A more verbose message when the db is not up to date.

[tzyganu]

Right now, when the database is not up to date you just get a message saying "Looks like database is outdated. Please, use setup tool to perform update".
I know that running the setup tool should solve the problem, no matter what the out of sync module is, but as a developer I would like to know what module is not updated yet.
This can simply be solved if the method Magento\Framework\Module\Plugin\DbStatusValidator::isDbUpToDate returned the name of the outdated module instead of false and in aroundDispatch instead of checking if (!$this->isDbUpToDate()) just check if ($this->isDbUpToDate() !== true)

[buskamuza]

@tzyganu , we're currently working on improving this message.
Could you, please, help us understand why do you need list of outdated modules? There is no ability to update DB module by module.

[tzyganu]

@buskamuza Well..there is always this reason: A developer should know what, where and why it happens. The more verbose the error message the better.
The idea came while I was making the sample data for magento 2, compatible with alpha 104. I kept getting the "Looks like database...." message and it was annoying.

[buskamuza]

@tzyganu , thanks. Does it make sense then to show such details in "developer" mode only? For other modes - save in a log?

[tzyganu]

@buskamuza. Seams right for me.

[vpelipenko]

Internal ticket: MAGETWO-31536