symfony_configs.md

Some rules

Configs exist in three levels:

1. local
2. dev | stg | prod
3. default (no environment)

There are three types of configs:

1. Application-level
2. Global-level
3. Global-level, but feature-specific (e.g. api_router)

Application-level configurations should start off by including their logical parent, applicational-level config, followed by their global-level configuration and/or any global, feature-specific configs (if applicable). Global-level configurations should not include logical parents, since application-level configs do that, but they may include global, feature-specific configs.

app/config/config_local.yml (8) imports:
 * app/config/dev.yml (5), which imports:
   * app/config/config.yml (2), which imports
     * /config/config.yml (1)
   * /config/config_dev.yml (4), which imports:
     * /config/dev/api_router.yml (3)
 * /config/local.yml (7), which imports
   * /config/local/api_router.yml (6)

The numbers beside each file indicate the order in which their contents will be processed. Alternatively:

1. /config/config.yml
2. app/config/config.yml
3. /config/dev/api_router.yml
4. /config/config_dev.yml
5. app/config/dev.yml
6. /config/local/api_router.yml
7. /config/local.yml
8. app/config/config_local.yml

The rule of thumb is lowest level first, and for each level, global before application.