I have recently made a new symfony project on php7 and I had a lot of problems installing mongo doctrine.
What I have tried:
- Directly mention packages in composer.json and run composer update
- Putting all new packages "@stable" version
None of the above worked, but I have found a very specific way that it worked and the order of the steps is very important:
php composer.phar require alcaeus/mongo-php-adapter php composer.phar require doctrine/mongodb-odm-bundle