Ошибка Composer при обновлении symfony 2.8 до 3.0

Question

Я успешно обновил версию Symfony с 2.5 до 2.8 и удалил все мои вызовы на устаревшие методы. Итак, теперь я хочу обновить до 3.0. *. Так что я обновил свой composer.json с "symfony/symfony": "3.0.*" и запущенной composer update symfony/symfony, но я получаю следующее сообщение об ошибке в консоли:

λ composer update symfony/symfony 
Loading composer repositories with package information 
Updating dependencies (including require-dev) 
Your requirements could not be resolved to an installable set of packages. 

    Problem 1 
    - Conclusion: don't install symfony/symfony v3.0.9 
    - Conclusion: don't install symfony/symfony v3.0.8 
    - Conclusion: don't install symfony/symfony v3.0.7 
    - Conclusion: don't install symfony/symfony v3.0.6 
    - Conclusion: don't install symfony/symfony v3.0.5 
    - Conclusion: don't install symfony/symfony v3.0.4 
    - Conclusion: don't install symfony/symfony v3.0.3 
    - Conclusion: don't install symfony/symfony v3.0.2 
    - Conclusion: don't install symfony/symfony v3.0.1 
    - sensio/generator-bundle v2.5.3 requires symfony/framework-bundle ~2.2 -> satisfiable by symfony/symfony[v2.8.8], symfony/framework-bundle[v2.2.0, v2.2.1, v2.2.10, v2.2.11, v2.2.2, v2.2.3, v2.2.4, v2.2.5, v2.2.6, v2.2.7, v2.2.8, v2.2.9, v2.3.0, v2.3.1, v2.3.10, v2.3.11, v2.3.12, v2.3.13, v2.3.14, v2.3.15, v2.3.16, v2.3.17, v2.3.18, v2.3.19, v2.3.2, v2.3.20, v2.3.21, v2.3.22, v2.3.23, v2.3.24, v2.3.25, v2.3.26, v2.3.27, v2.3.28, v2.3.29, v2.3.3, v2.3.30, v2.3.31, v2.3.32, v2.3.33, v2.3.34, v2.3.35, v2.3.36, v2.3.37, v2.3.38, v2.3.39, v2.3.4, v2.3.40, v2.3.41, v2.3.42, v2.3.5, v2.3.6, v2.3.7, v2.3.8, v2.3.9, v2.4.0, v2.4.1, v2.4.10, v2.4.2, v2.4.3, v2.4.4, v2.4.5, v2.4.6, v2.4.7, v2.4.8, v2.4.9, v2.5.0, v2.5.1, v2.5.10, v2.5.11, v2.5.12, v2.5.2, v2.5.3, v2.5.4, v2.5.5, v2.5.6, v2.5.7, v2.5.8, v2.5.9, v2.6.0, v2.6.1, v2.6.10, v2.6.11, v2.6.12, v2.6.13, v2.6.2, v2.6.3, v2.6.4, v2.6.5, v2.6.6, v2.6.7, v2.6.8, v2.6.9, v2.7.0, v2.7.1, v2.7.10, v2.7.11, v2.7.12, v2.7.13, v2.7.14, v2.7.15, v2.7.16, v2.7.2, v2.7.3, v2.7.4, v2.7.5, v2.7.6, v2.7.7, v2.7.8, v2.7.9, v2.8.0, v2.8.1, v2.8.2, v2.8.3, v2.8.4, v2.8.5, v2.8.6, v2.8.7, v2.8.8, v2.8.9]. 
    - sensio/generator-bundle v2.5.3 requires symfony/console ~2.5 -> satisfiable by symfony/symfony[v2.8.8], symfony/console[v2.5.0, v2.5.1, v2.5.10, v2.5.11, v2.5.12, v2.5.2, v2.5.3, v2.5.4, v2.5.5, v2.5.6, v2.5.7, v2.5.8, v2.5.9, v2.6.0, v2.6.1, v2.6.10, v2.6.11, v2.6.12, v2.6.13, v2.6.2, v2.6.3, v2.6.4, v2.6.5, v2.6.6, v2.6.7, v2.6.8, v2.6.9, v2.7.0, v2.7.1, v2.7.10, v2.7.11, v2.7.12, v2.7.13, v2.7.14, v2.7.15, v2.7.16, v2.7.2, v2.7.3, v2.7.4, v2.7.5, v2.7.6, v2.7.7, v2.7.8, v2.7.9, v2.8.0, v2.8.1, v2.8.2, v2.8.3, v2.8.4, v2.8.5, v2.8.6, v2.8.7, v2.8.8, v2.8.9]. 
    - sensio/generator-bundle v2.5.3 requires symfony/framework-bundle ~2.2 -> satisfiable by symfony/symfony[v2.8.8], symfony/framework-bundle[v2.2.0, v2.2.1, v2.2.10, v2.2.11, v2.2.2, v2.2.3, v2.2.4, v2.2.5, v2.2.6, v2.2.7, v2.2.8, v2.2.9, v2.3.0, v2.3.1, v2.3.10, v2.3.11, v2.3.12, v2.3.13, v2.3.14, v2.3.15, v2.3.16, v2.3.17, v2.3.18, v2.3.19, v2.3.2, v2.3.20, v2.3.21, v2.3.22, v2.3.23, v2.3.24, v2.3.25, v2.3.26, v2.3.27, v2.3.28, v2.3.29, v2.3.3, v2.3.30, v2.3.31, v2.3.32, v2.3.33, v2.3.34, v2.3.35, v2.3.36, v2.3.37, v2.3.38, v2.3.39, v2.3.4, v2.3.40, v2.3.41, v2.3.42, v2.3.5, v2.3.6, v2.3.7, v2.3.8, v2.3.9, v2.4.0, v2.4.1, v2.4.10, v2.4.2, v2.4.3, v2.4.4, v2.4.5, v2.4.6, v2.4.7, v2.4.8, v2.4.9, v2.5.0, v2.5.1, v2.5.10, v2.5.11, v2.5.12, v2.5.2, v2.5.3, v2.5.4, v2.5.5, v2.5.6, v2.5.7, v2.5.8, v2.5.9, v2.6.0, v2.6.1, v2.6.10, v2.6.11, v2.6.12, v2.6.13, v2.6.2, v2.6.3, v2.6.4, v2.6.5, v2.6.6, v2.6.7, v2.6.8, v2.6.9, v2.7.0, v2.7.1, v2.7.10, v2.7.11, v2.7.12, v2.7.13, v2.7.14, v2.7.15, v2.7.16, v2.7.2, v2.7.3, v2.7.4, v2.7.5, v2.7.6, v2.7.7, v2.7.8, v2.7.9, v2.8.0, v2.8.1, v2.8.2, v2.8.3, v2.8.4, v2.8.5, v2.8.6, v2.8.7, v2.8.8, v2.8.9]. 
    - don't install symfony/symfony v3.0.0|don't install symfony/framework-bundle v2.2.0 
    - don't install symfony/symfony v3.0.0|don't install symfony/framework-bundle v2.2.1 
    - don't install symfony/symfony v3.0.0|don't install symfony/framework-bundle v2.2.10 
    - don't install symfony/symfony v3.0.0|don't install symfony/framework-bundle v2.2.11 
    - don't install symfony/symfony v3.0.0|don't install symfony/framework-bundle v2.2.2 
    - don't install symfony/symfony v3.0.0|don't install symfony/framework-bundle v2.2.3 
    - don't install symfony/symfony v3.0.0|don't install symfony/framework-bundle v2.2.4 
    - don't install symfony/symfony v3.0.0|don't install symfony/framework-bundle v2.2.5 
    - don't install symfony/symfony v3.0.0|don't install symfony/framework-bundle v2.2.6 
    - don't install symfony/symfony v3.0.0|don't install symfony/framework-bundle v2.2.7 
    - don't install symfony/symfony v3.0.0|don't install symfony/framework-bundle v2.2.8 
    - don't install symfony/symfony v3.0.0|don't install symfony/framework-bundle v2.2.9 
    - don't install symfony/symfony v3.0.0|don't install symfony/framework-bundle v2.3.0 
    - don't install symfony/symfony v3.0.0|don't install symfony/framework-bundle v2.3.1 
    - don't install symfony/symfony v3.0.0|don't install symfony/framework-bundle v2.3.10 
    - don't install symfony/symfony v3.0.0|don't install symfony/framework-bundle v2.3.11 
    - don't install symfony/symfony v3.0.0|don't install symfony/framework-bundle v2.3.12 
    - don't install symfony/symfony v3.0.0|don't install symfony/framework-bundle v2.3.13 
    - don't install symfony/symfony v3.0.0|don't install symfony/framework-bundle v2.3.14 
    - don't install symfony/symfony v3.0.0|don't install symfony/framework-bundle v2.3.15 
    - don't install symfony/symfony v3.0.0|don't install symfony/framework-bundle v2.3.16 
    - don't install symfony/symfony v3.0.0|don't install symfony/framework-bundle v2.3.17 
    - don't install symfony/symfony v3.0.0|don't install symfony/framework-bundle v2.3.18 
    - don't install symfony/symfony v3.0.0|don't install symfony/framework-bundle v2.3.19 
    - don't install symfony/symfony v3.0.0|don't install symfony/framework-bundle v2.3.2 
    - don't install symfony/symfony v3.0.0|don't install symfony/framework-bundle v2.3.20 
    - don't install symfony/symfony v3.0.0|don't install symfony/framework-bundle v2.3.21 
    - don't install symfony/symfony v3.0.0|don't install symfony/framework-bundle v2.3.22 
    - don't install symfony/symfony v3.0.0|don't install symfony/framework-bundle v2.3.23 
    - don't install symfony/symfony v3.0.0|don't install symfony/framework-bundle v2.3.24 
    - don't install symfony/symfony v3.0.0|don't install symfony/framework-bundle v2.3.25 
    - don't install symfony/symfony v3.0.0|don't install symfony/framework-bundle v2.3.26 
    - don't install symfony/symfony v3.0.0|don't install symfony/framework-bundle v2.3.27 
    - don't install symfony/symfony v3.0.0|don't install symfony/framework-bundle v2.3.28 
    - don't install symfony/symfony v3.0.0|don't install symfony/framework-bundle v2.3.29 
    - don't install symfony/symfony v3.0.0|don't install symfony/framework-bundle v2.3.3 
    - don't install symfony/symfony v3.0.0|don't install symfony/framework-bundle v2.3.30 
    - don't install symfony/symfony v3.0.0|don't install symfony/framework-bundle v2.3.31 
    - don't install symfony/symfony v3.0.0|don't install symfony/framework-bundle v2.3.32 
    - don't install symfony/symfony v3.0.0|don't install symfony/framework-bundle v2.3.33 
    - don't install symfony/symfony v3.0.0|don't install symfony/framework-bundle v2.3.34 
    - don't install symfony/symfony v3.0.0|don't install symfony/framework-bundle v2.3.35 
    - don't install symfony/symfony v3.0.0|don't install symfony/framework-bundle v2.3.36 
    - don't install symfony/symfony v3.0.0|don't install symfony/framework-bundle v2.3.37 
    - don't install symfony/symfony v3.0.0|don't install symfony/framework-bundle v2.3.38 
    - don't install symfony/symfony v3.0.0|don't install symfony/framework-bundle v2.3.39 
    - don't install symfony/symfony v3.0.0|don't install symfony/framework-bundle v2.3.4 
    - don't install symfony/symfony v3.0.0|don't install symfony/framework-bundle v2.3.40 
    - don't install symfony/symfony v3.0.0|don't install symfony/framework-bundle v2.3.41 
    - don't install symfony/symfony v3.0.0|don't install symfony/framework-bundle v2.3.42 
    - don't install symfony/symfony v3.0.0|don't install symfony/framework-bundle v2.3.5 
    - don't install symfony/symfony v3.0.0|don't install symfony/framework-bundle v2.3.6 
    - don't install symfony/symfony v3.0.0|don't install symfony/framework-bundle v2.3.7 
    - don't install symfony/symfony v3.0.0|don't install symfony/framework-bundle v2.3.8 
    - don't install symfony/symfony v3.0.0|don't install symfony/framework-bundle v2.3.9 
    - don't install symfony/symfony v3.0.0|don't install symfony/framework-bundle v2.4.0 
    - don't install symfony/symfony v3.0.0|don't install symfony/framework-bundle v2.4.1 
    - don't install symfony/symfony v3.0.0|don't install symfony/framework-bundle v2.4.10 
    - don't install symfony/symfony v3.0.0|don't install symfony/framework-bundle v2.4.2 
    - don't install symfony/symfony v3.0.0|don't install symfony/framework-bundle v2.4.3 
    - don't install symfony/symfony v3.0.0|don't install symfony/framework-bundle v2.4.4 
    - don't install symfony/symfony v3.0.0|don't install symfony/framework-bundle v2.4.5 
    - don't install symfony/symfony v3.0.0|don't install symfony/framework-bundle v2.4.6 
    - don't install symfony/symfony v3.0.0|don't install symfony/framework-bundle v2.4.7 
    - don't install symfony/symfony v3.0.0|don't install symfony/framework-bundle v2.4.8 
    - don't install symfony/symfony v3.0.0|don't install symfony/framework-bundle v2.4.9 
    - don't install symfony/symfony v3.0.0|don't install symfony/framework-bundle v2.5.0 
    - don't install symfony/symfony v3.0.0|don't install symfony/framework-bundle v2.5.1 
    - don't install symfony/symfony v3.0.0|don't install symfony/framework-bundle v2.5.10 
    - don't install symfony/symfony v3.0.0|don't install symfony/framework-bundle v2.5.11 
    - don't install symfony/symfony v3.0.0|don't install symfony/framework-bundle v2.5.12 
    - don't install symfony/symfony v3.0.0|don't install symfony/framework-bundle v2.5.2 
    - don't install symfony/symfony v3.0.0|don't install symfony/framework-bundle v2.5.3 
    - don't install symfony/symfony v3.0.0|don't install symfony/framework-bundle v2.5.4 
    - don't install symfony/symfony v3.0.0|don't install symfony/framework-bundle v2.5.5 
    - don't install symfony/symfony v3.0.0|don't install symfony/framework-bundle v2.5.6 
    - don't install symfony/symfony v3.0.0|don't install symfony/framework-bundle v2.5.7 
    - don't install symfony/symfony v3.0.0|don't install symfony/framework-bundle v2.5.8 
    - don't install symfony/symfony v3.0.0|don't install symfony/framework-bundle v2.5.9 
    - don't install symfony/symfony v3.0.0|don't install symfony/framework-bundle v2.6.0 
    - don't install symfony/symfony v3.0.0|don't install symfony/framework-bundle v2.6.1 
    - don't install symfony/symfony v3.0.0|don't install symfony/framework-bundle v2.6.10 
    - don't install symfony/symfony v3.0.0|don't install symfony/framework-bundle v2.6.11 
    - don't install symfony/symfony v3.0.0|don't install symfony/framework-bundle v2.6.12 
    - don't install symfony/symfony v3.0.0|don't install symfony/framework-bundle v2.6.13 
    - don't install symfony/symfony v3.0.0|don't install symfony/framework-bundle v2.6.2 
    - don't install symfony/symfony v3.0.0|don't install symfony/framework-bundle v2.6.3 
    - don't install symfony/symfony v3.0.0|don't install symfony/framework-bundle v2.6.4 
    - don't install symfony/symfony v3.0.0|don't install symfony/framework-bundle v2.6.5 
    - don't install symfony/symfony v3.0.0|don't install symfony/framework-bundle v2.6.6 
    - don't install symfony/symfony v3.0.0|don't install symfony/framework-bundle v2.6.7 
    - don't install symfony/symfony v3.0.0|don't install symfony/framework-bundle v2.6.8 
    - don't install symfony/symfony v3.0.0|don't install symfony/framework-bundle v2.6.9 
    - don't install symfony/symfony v3.0.0|don't install symfony/framework-bundle v2.7.0 
    - don't install symfony/symfony v3.0.0|don't install symfony/framework-bundle v2.7.1 
    - don't install symfony/symfony v3.0.0|don't install symfony/framework-bundle v2.7.10 
    - don't install symfony/symfony v3.0.0|don't install symfony/framework-bundle v2.7.11 
    - don't install symfony/symfony v3.0.0|don't install symfony/framework-bundle v2.7.12 
    - don't install symfony/symfony v3.0.0|don't install symfony/framework-bundle v2.7.13 
    - don't install symfony/symfony v3.0.0|don't install symfony/framework-bundle v2.7.14 
    - don't install symfony/symfony v3.0.0|don't install symfony/framework-bundle v2.7.15 
    - don't install symfony/symfony v3.0.0|don't install symfony/framework-bundle v2.7.16 
    - don't install symfony/symfony v3.0.0|don't install symfony/framework-bundle v2.7.2 
    - don't install symfony/symfony v3.0.0|don't install symfony/framework-bundle v2.7.3 
    - don't install symfony/symfony v3.0.0|don't install symfony/framework-bundle v2.7.4 
    - don't install symfony/symfony v3.0.0|don't install symfony/framework-bundle v2.7.5 
    - don't install symfony/symfony v3.0.0|don't install symfony/framework-bundle v2.7.6 
    - don't install symfony/symfony v3.0.0|don't install symfony/framework-bundle v2.7.7 
    - don't install symfony/symfony v3.0.0|don't install symfony/framework-bundle v2.7.8 
    - don't install symfony/symfony v3.0.0|don't install symfony/framework-bundle v2.7.9 
    - don't install symfony/symfony v3.0.0|don't install symfony/framework-bundle v2.8.0 
    - don't install symfony/symfony v3.0.0|don't install symfony/framework-bundle v2.8.1 
    - don't install symfony/symfony v3.0.0|don't install symfony/framework-bundle v2.8.2 
    - don't install symfony/symfony v3.0.0|don't install symfony/framework-bundle v2.8.3 
    - don't install symfony/symfony v3.0.0|don't install symfony/framework-bundle v2.8.4 
    - don't install symfony/symfony v3.0.0|don't install symfony/framework-bundle v2.8.5 
    - don't install symfony/symfony v3.0.0|don't install symfony/framework-bundle v2.8.6 
    - don't install symfony/symfony v3.0.0|don't install symfony/framework-bundle v2.8.7 
    - don't install symfony/symfony v3.0.0|don't install symfony/framework-bundle v2.8.8 
    - don't install symfony/symfony v3.0.0|don't install symfony/framework-bundle v2.8.9 
    - Can only install one of: symfony/symfony[v3.0.0, v2.8.8]. 
    - don't install symfony/console v2.5.0|don't install symfony/symfony v3.0.0 
    - don't install symfony/console v2.5.1|don't install symfony/symfony v3.0.0 
    - don't install symfony/console v2.5.10|don't install symfony/symfony v3.0.0 
    - don't install symfony/console v2.5.11|don't install symfony/symfony v3.0.0 
    - don't install symfony/console v2.5.12|don't install symfony/symfony v3.0.0 
    - don't install symfony/console v2.5.2|don't install symfony/symfony v3.0.0 
    - don't install symfony/console v2.5.3|don't install symfony/symfony v3.0.0 
    - don't install symfony/console v2.5.4|don't install symfony/symfony v3.0.0 
    - don't install symfony/console v2.5.5|don't install symfony/symfony v3.0.0 
    - don't install symfony/console v2.5.6|don't install symfony/symfony v3.0.0 
    - don't install symfony/console v2.5.7|don't install symfony/symfony v3.0.0 
    - don't install symfony/console v2.5.8|don't install symfony/symfony v3.0.0 
    - don't install symfony/console v2.5.9|don't install symfony/symfony v3.0.0 
    - don't install symfony/console v2.6.0|don't install symfony/symfony v3.0.0 
    - don't install symfony/console v2.6.1|don't install symfony/symfony v3.0.0 
    - don't install symfony/console v2.6.10|don't install symfony/symfony v3.0.0 
    - don't install symfony/console v2.6.11|don't install symfony/symfony v3.0.0 
    - don't install symfony/console v2.6.12|don't install symfony/symfony v3.0.0 
    - don't install symfony/console v2.6.13|don't install symfony/symfony v3.0.0 
    - don't install symfony/console v2.6.2|don't install symfony/symfony v3.0.0 
    - don't install symfony/console v2.6.3|don't install symfony/symfony v3.0.0 
    - don't install symfony/console v2.6.4|don't install symfony/symfony v3.0.0 
    - don't install symfony/console v2.6.5|don't install symfony/symfony v3.0.0 
    - don't install symfony/console v2.6.6|don't install symfony/symfony v3.0.0 
    - don't install symfony/console v2.6.7|don't install symfony/symfony v3.0.0 
    - don't install symfony/console v2.6.8|don't install symfony/symfony v3.0.0 
    - don't install symfony/console v2.6.9|don't install symfony/symfony v3.0.0 
    - don't install symfony/console v2.7.0|don't install symfony/symfony v3.0.0 
    - don't install symfony/console v2.7.1|don't install symfony/symfony v3.0.0 
    - don't install symfony/console v2.7.10|don't install symfony/symfony v3.0.0 
    - don't install symfony/console v2.7.11|don't install symfony/symfony v3.0.0 
    - don't install symfony/console v2.7.12|don't install symfony/symfony v3.0.0 
    - don't install symfony/console v2.7.13|don't install symfony/symfony v3.0.0 
    - don't install symfony/console v2.7.14|don't install symfony/symfony v3.0.0 
    - don't install symfony/console v2.7.15|don't install symfony/symfony v3.0.0 
    - don't install symfony/console v2.7.16|don't install symfony/symfony v3.0.0 
    - don't install symfony/console v2.7.2|don't install symfony/symfony v3.0.0 
    - don't install symfony/console v2.7.3|don't install symfony/symfony v3.0.0 
    - don't install symfony/console v2.7.4|don't install symfony/symfony v3.0.0 
    - don't install symfony/console v2.7.5|don't install symfony/symfony v3.0.0 
    - don't install symfony/console v2.7.6|don't install symfony/symfony v3.0.0 
    - don't install symfony/console v2.7.7|don't install symfony/symfony v3.0.0 
    - don't install symfony/console v2.7.8|don't install symfony/symfony v3.0.0 
    - don't install symfony/console v2.7.9|don't install symfony/symfony v3.0.0 
    - don't install symfony/console v2.8.0|don't install symfony/symfony v3.0.0 
    - don't install symfony/console v2.8.1|don't install symfony/symfony v3.0.0 
    - don't install symfony/console v2.8.2|don't install symfony/symfony v3.0.0 
    - don't install symfony/console v2.8.3|don't install symfony/symfony v3.0.0 
    - don't install symfony/console v2.8.4|don't install symfony/symfony v3.0.0 
    - don't install symfony/console v2.8.5|don't install symfony/symfony v3.0.0 
    - don't install symfony/console v2.8.6|don't install symfony/symfony v3.0.0 
    - don't install symfony/console v2.8.7|don't install symfony/symfony v3.0.0 
    - don't install symfony/console v2.8.8|don't install symfony/symfony v3.0.0 
    - don't install symfony/console v2.8.9|don't install symfony/symfony v3.0.0 
    - Installation request for symfony/symfony 3.0.* -> satisfiable by symfony/symfony[v3.0.0, v3.0.1, v3.0.2, v3.0.3, v3.0.4, v3.0.5, v3.0.6, v3.0.7, v3.0.8, v3.0.9]. 
    - Installation request for sensio/generator-bundle (locked at v2.5.3, required as ~2.3) -> satisfiable by sensio/generator-bundle[v2.5.3]. 

Вот мой composer.json:

{ 
    "name": "symfony/framework-standard-edition", 
    "license": "MIT", 
    "type": "project", 
    "description": "The \"Symfony Standard Edition\" distribution", 
    "autoload": { 
     "psr-0": { "": "src/", "SymfonyStandard": "app/" } 
    }, 
    "require": { 
     "php": ">=5.3.3", 
     "symfony/symfony": "3.0.*", 
     "doctrine/orm": "~2.2,>=2.2.3", 
     "doctrine/doctrine-bundle": "~1.2", 
     "twig/extensions": "~1.0", 
     "symfony/assetic-bundle": "~2.3", 
     "symfony/swiftmailer-bundle": "~2.3", 
     "symfony/monolog-bundle": "~2.4", 
     "sensio/distribution-bundle": "~3.0", 
     "sensio/framework-extra-bundle": "~3.0", 
     "incenteev/composer-parameter-handler": "~2.0", 
     "stof/doctrine-extensions-bundle": "dev-master", 
     "oh/instagram-bundle" : "dev-master", 
     "knplabs/knp-paginator-bundle": "~2.4", 
     "imagine/imagine": "0.6.*", 
     "excelwebzone/recaptcha-bundle": "2.6.*@dev" 
    }, 
    "require-dev": { 
     "sensio/generator-bundle": "~2.3" 
    }, 
    "scripts": { 
     "post-root-package-install": [ 
      "SymfonyStandard\\Composer::hookRootPackageInstall" 
     ], 
     "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", 
      "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::removeSymfonyStandardFiles" 
     ], 
     "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", 
      "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::removeSymfonyStandardFiles" 
     ] 
    }, 
    "config": { 
     "bin-dir": "bin" 
    }, 
    "extra": { 
     "symfony-app-dir": "app", 
     "symfony-web-dir": "web", 
     "symfony-var-dir": "var", 
     "symfony-bin-dir": "bin", 
     "incenteev-parameters": { 
      "file": "app/config/parameters.yml", 
      "keep-outdated": true 
     }, 
     "branch-alias": { 
      "dev-master": "2.5-dev" 
     } 
    } 
} 

ли найти кто-то, что не так с моей установки ?

спасибо!

Answer 1

Как и в upgrade from Symfony 2.3 to 2.7, вы должны обновить все а не только пакет symfony/symfony.

Мы можем использовать GitHub, чтобы сгенерировать diff between Symfony 2.8 and 3.0 (если не отображается дифф для файла composer.json нажмите на файлы изменились вкладку, а затем 26 измененные файлы и, наконец, composer.json):

  "psr-4": { "": "src/" }, 
     "classmap": [ "app/AppKernel.php", "app/AppCache.php" ] 
    }, 
+ "autoload-dev": { 
+  "psr-4": { "Tests\\": "tests/" } 
+ }, 
    "require": { 
-  "php": ">=5.3.9", 
-  "symfony/symfony": "2.8.*", 
-  "doctrine/orm": "^2.4.8", 
-  "doctrine/doctrine-bundle": "~1.4", 
-  "symfony/swiftmailer-bundle": "~2.3", 
-  "symfony/monolog-bundle": "~2.4", 
-  "sensio/distribution-bundle": "~5.0", 
+  "php": ">=5.5.9", 
+  "symfony/symfony": "3.0.*", 
+  "doctrine/orm": "^2.5", 
+  "doctrine/doctrine-bundle": "^1.6", 
+  "doctrine/doctrine-cache-bundle": "^1.2", 
+  "symfony/swiftmailer-bundle": "^2.3", 
+  "symfony/monolog-bundle": "^2.8", 
+  "sensio/distribution-bundle": "^5.0", 
     "sensio/framework-extra-bundle": "^3.0.2", 
-  "incenteev/composer-parameter-handler": "~2.0" 
+  "incenteev/composer-parameter-handler": "^2.0" 
    }, 
    "require-dev": { 
-  "sensio/generator-bundle": "~3.0", 
-  "symfony/phpunit-bridge": "~2.7" 
+  "sensio/generator-bundle": "^3.0", 
+  "symfony/phpunit-bridge": "^3.0" 
    }, 
    "scripts": { 
     "post-install-cmd": [ 

Таким образом, вы должны использовать composer.json так:

"require": { 
     "php": ">=5.3.9", 
     "symfony/symfony": "3.0.*", 
     "doctrine/orm": "^2.5", 
     "doctrine/doctrine-bundle": "^1.6", 
     "doctrine/doctrine-cache-bundle": "^1.2", 
     "twig/extensions": "~1.0", 
     "symfony/swiftmailer-bundle": "^2.3", 
     "symfony/monolog-bundle": "^2.8", 
     "sensio/distribution-bundle": "^5.0", 
     "sensio/framework-extra-bundle": "^3.0.2", 
     "incenteev/composer-parameter-handler": "^2.0", 
     … 
    }, 
    "require-dev": { 
     "sensio/generator-bundle": "^3.0" 
    }, 

И конфликты между пакетами больше не должны появляться.

Answer 2

Вы должны изменить эту строку:

"require-dev": { 
    "sensio/generator-bundle": "~2.3" 
}, 

к

"require-dev": { 
    "sensio/generator-bundle": "^3.0" 
}, 

Генератор расслоением версии 2.3 несовместима с Symfony 3,0