Upgrading Doctrine in a Symfony 2.8 application - symfony

Question

I need to update to Doctrine 2.5 for a bundle which requires it (Vich\UploaderBundle). However I am facing two difficulties:
How do I know which Doctrine version is compatible with my Symfony 2.8 setup
How do I actually run the upgrade
Composer management is still quite obscure to me, especially the output you get when you try to update.
Here is my current composer.json:
{
"name": "symfony/framework-standard-edition",
"license": "MIT",
"type": "project",
"description": "The \"Symfony Standard Edition\" distribution",
"autoload": {
"psr-4": { "": "src/" },
"files": ["app/AppKernel.php"]
},
"require": {
"php": ">=7.0",
"symfony/symfony": "2.8.*",
"twig/extensions": "1.0.*",
"symfony/assetic-bundle": "2.3.*",
"symfony/swiftmailer-bundle": "2.3.*",
"symfony/monolog-bundle": "2.3.*",
"sensio/distribution-bundle": "2.3.*",
"sensio/framework-extra-bundle": "2.3.*",
"sensio/generator-bundle": "2.3.*",
"doctrine/orm": "~2.2,>=2.2.3",
"doctrine/doctrine-bundle": "1.2.*",
"doctrine/migrations": "dev-master",
"doctrine/doctrine-migrations-bundle": "dev-master",
"doctrine/doctrine-fixtures-bundle": "dev-master"
"incenteev/composer-parameter-handler": "~2.0",
"apy/datagrid-bundle": "dev-master",
"pagerfanta/pagerfanta": "dev-master",
"white-october/pagerfanta-bundle": "dev-master",
"idci/admin-generator-bundle": "dev-master",
"mopa/bootstrap-bundle": "dev-master",
"twbs/bootstrap": "v3.2.0",
"knplabs/knp-paginator-bundle": "dev-master",
"knplabs/knp-menu-bundle": "dev-master",
"craue/formflow-bundle": "dev-master",
"friendsofsymfony/user-bundle": "~2.0#dev",
"liuggio/excelbundle": "~2.0",
"excelwebzone/recaptcha-bundle": "~2.3",
"robertotru/to-inline-style-email-bundle": "dev-master",
},
"scripts": {
"post-install-cmd": [
"Incenteev\\ParameterHandler\\ScriptHandler::buildParameters",
"Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::buildBootstrap",
"Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::clearCache",
"Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::installAssets",
"Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::installRequirementsFile"
],
"post-update-cmd": [
"Incenteev\\ParameterHandler\\ScriptHandler::buildParameters",
"Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::buildBootstrap",
"Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::clearCache",
"Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::installAssets",
"Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::installRequirementsFile"
]
},
"config": {
"bin-dir": "bin"
},
"minimum-stability": "dev",
"extra": {
"symfony-app-dir": "app",
"symfony-web-dir": "web",
"incenteev-parameters": {
"file": "app/config/parameters.yml"
},
"branch-alias": {
"dev-master": "2.3-dev"
}
},
"require-dev": {
}
}
[EDIT]
Specified require doctrine version.
I also have the feeling that this composer.json needs to be cleaned up somehow but that's another question...

Answer 1

Your problem seem to come from this strict restriction on the dependency : "doctrine/doctrine-bundle": "1.2.*" which require "doctrine/orm" < 2.5 (see here : https://packagist.org/packages/doctrine/doctrine-bundle#v1.2.0)
The solution might be to upgrade the version of this first dependency to
"doctrine/doctrine-bundle": "^1.6"
I didn't check the compatibility with all others packages so i'm not completly sure but you still can try.