It’s just a simple journey of how a minor nuance of ActiveRecord cost me an afternoon and how I thought through that problem. 3.2.13 config.Before we get started I should warn you this post doesn’t contain anything groundbreaking or revolutionary. Accepts a valid day of week as a symbol (e.g. Sets the default beginning of week for theĪpplication. The method toload_lib_once is similar to toload_lib, except that it adds lib to toload_once_paths instead.īy calling toload_lib_once, classes and modules in lib can be autoloaded, even from application initializers, but won't be reloaded. Please, see more details in the autoloading guide. autoload_lib ( ignore: %w(assets tasks generators) ) Copy Please, pass their name relative to lib in the required ignore keyword argument. Normally, the lib directory has subdirectories that should not be autoloaded or eager loaded. This method adds lib to toload_paths and config.eager_load_paths. Since Rails 6, it is not recommended to adjust this. 3.2.9 toload_pathsĪccepts an array of paths from which Rails will autoload constants. All elements of this array must also be in autoload_paths. Otherwise, all autoloading happens only once. Relevant if reloading is enabled, which it is by default in the development environment. Defaults toĪccepts an array of paths from which Rails will autoload constants that won't be wiped per request. 3.2.7 toflush_logĮnables writing log file output immediately instead of buffering. This middleware makes the server assume that the proxy already terminated SSL, and that the request really is HTTPS. This makes redirects and cookie security target HTTP instead of HTTPS. This is useful when proxying through a load balancer that terminates SSL, the forwarded request will appear as though its HTTP instead of HTTPS to the application. Makes application believe that all requests are arriving over SSL. Shorter version of config.action_controller.asset_host. Useful when CDNs are used for hosting assets, or when you want to work around the concurrency constraints built-in in browsers using different domain aliases. This should onlyīe set to false if application code is not thread safe. after_routes_loaded do # Code that does something with end Copy 3.2.4 config.allow_concurrencyĬontrols whether requests should be handled concurrently. Useful for configuring values set up by other initializers:Ĭonfig. Note that this block will be run for rake tasks. That includes the initialization of the framework itself, engines, and all the application's initializers in config/initializers. Takes a block which will be run after Rails has finished initializing the application. The lib directory is not affected by this flag, it is added to $LOAD_PATH always. The default value depends on the config.load_defaults target version: Starting with version Setting this to false saves Ruby from checking these directories when resolving require calls with relative paths, and saves Bootsnap work and RAM, since it does not need to build an index for them. Zeitwerk uses absolute paths internally, and applications running in :zeitwerk mode do not need require_dependency, so models, controllers, jobs, etc. It is recommended to be set to false in :zeitwerk mode early, in config/application.rb. Says whether autoload paths have to be added to $LOAD_PATH. 3.2.1 config.add_autoload_paths_to_load_path The following configuration methods are to be called on a Rails::Railtie object, such as a subclass of Rails::Engine or Rails::Application. config.action_bug_exception_log_level: :error.config.action_controller.allow_deprecated_parameters_hash_equality: false.3.1.1 Default Values for Target Version 7.1 In cases of conflicting values, newer versions take precedence over older versions. For example, config.load_defaults 6.1 will load defaults for all versions up to and including version 6.1.īelow are the default values associated with each target version. 3.1 Versioned Default ValuesĬonfig.load_defaults loads default configuration values for a target version and all versions prior. This will break because autoloading during initialization cannot be safely repeated when the app reloads. If you need to apply configuration directly to a class, use a lazy load hook in an initializer to avoid autoloading the class before initialization has completed.
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