Symfony 4：您请求了一个不存在的参数“locale”

Question

当我在我的 Symfony 4 应用程序（已经在共享托管服务中在线）中启用“开发”模式时，它会显示以下消息：

(1/1) ParameterNotFoundException
You have requested a non-existent parameter "locale".

in ParameterBag.php (line 100)
at ParameterBag->get('locale')
in EnvPlaceholderParameterBag.php (line 57)
at EnvPlaceholderParameterBag->get('locale')
in ParameterBag.php (line 216)
at ParameterBag->resolveString('%locale%', array('locale' => true))
in ParameterBag.php (line 187)
...

并且不允许调试应用程序。我的 config/services.yml 代码是默认的：

# Put parameters here that don't need to change on each machine where the app is deployed
# https://symfony.com/doc/current/best_practices/configuration.html#application-related-configuration
parameters:
    locale: 'en'

services:
    # default configuration for Services in *this* file
    _defaults:
        autowire: true      # Automatically injects dependencies in your Services.
        autoconfigure: true # Automatically registers your Services as commands, event subscribers, etc.
        public: false       # Allows optimizing the container by removing unused Services; this also means
                            # fetching Services directly from the container via $container->get() won't work.
                            # The best practice is to be explicit about your dependencies anyway.
...

拜托，有人可以帮我解决这个错误。

Answer 1

在新的 symfony 4.3 + 奏鸣曲管理包安装过程中遇到了同样的问题。作为解决方案，我添加了语言环境参数：

// /config/services.yaml

parameters:
    locale: 'en' 

Answer 2

虽然我不是 Symphony 专家，但文档似乎允许参数部分中的任何内容，但它确实提到还定义 .env.dist 文件中的值以及在此处使用它们。

http://symfony.com/doc/current/best_practices/configuration.html#canonical-parameters