在Symfony 2.8应用程序中升级原则

我需要更新到原则2.5，以获得需要它的包（Vich\UploaderBundle）。然而，我面临两个困难：

我如何知道哪个版本与我的Symfony 2.8设置兼容

如何实际运行升级

作曲家管理对我来说仍然很模糊，尤其是当您尝试更新时得到的输出

以下是我当前的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": {
}
}

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[编辑] 指定的要求条令版本。

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我还觉得这个composer.json需要以某种方式进行清理，但这是另一个问题…

您的问题似乎来自对依赖性的严格限制：“条令/条令包”：“1.2.*”需要“条令/orm”<2.5（参见此处：）

解决方案可能是将第一个依赖项的版本升级到

"doctrine/doctrine-bundle": "^1.6"

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我没有检查与所有其他软件包的兼容性，所以我不能完全确定，但您仍然可以尝试。

一种常用的方法是创建一个新的S2.8项目，然后检查它的composer.json。看起来你所做的只是把Symfony从2.3升到2.8？你有相当多的开发主项目在那里。恐怕要费点劲了。