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---
title: Rails
layout: default
---
<div class="main">
<div class="banner">
<span>Ruby on Rails 8.0.0</span><br />
<div class="type">Module</div>
<h1>
Rails
</h1>
<ul class="files">
<li><a href="../files/railties/lib/rails_rb.html">railties/lib/rails.rb</a></li>
<li><a href="../files/railties/lib/rails/api/task_rb.html">railties/lib/rails/api/task.rb</a></li>
<li><a href="../files/railties/lib/rails/app_loader_rb.html">railties/lib/rails/app_loader.rb</a></li>
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<li><a href="../files/railties/lib/rails/application/configuration_rb.html">railties/lib/rails/application/configuration.rb</a></li>
<li><a href="../files/railties/lib/rails/application/default_middleware_stack_rb.html">railties/lib/rails/application/default_middleware_stack.rb</a></li>
<li><a href="../files/railties/lib/rails/application/finisher_rb.html">railties/lib/rails/application/finisher.rb</a></li>
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<li><a href="../files/railties/lib/rails/application_controller_rb.html">railties/lib/rails/application_controller.rb</a></li>
<li><a href="../files/railties/lib/rails/autoloaders_rb.html">railties/lib/rails/autoloaders.rb</a></li>
<li><a href="../files/railties/lib/rails/autoloaders/inflector_rb.html">railties/lib/rails/autoloaders/inflector.rb</a></li>
<li><a href="../files/railties/lib/rails/backtrace_cleaner_rb.html">railties/lib/rails/backtrace_cleaner.rb</a></li>
<li><a href="../files/railties/lib/rails/cli_rb.html">railties/lib/rails/cli.rb</a></li>
<li><a href="../files/railties/lib/rails/code_statistics_rb.html">railties/lib/rails/code_statistics.rb</a></li>
<li><a href="../files/railties/lib/rails/code_statistics_calculator_rb.html">railties/lib/rails/code_statistics_calculator.rb</a></li>
<li><a href="../files/railties/lib/rails/command_rb.html">railties/lib/rails/command.rb</a></li>
<li><a href="../files/railties/lib/rails/command/actions_rb.html">railties/lib/rails/command/actions.rb</a></li>
<li><a href="../files/railties/lib/rails/command/base_rb.html">railties/lib/rails/command/base.rb</a></li>
<li><a href="../files/railties/lib/rails/command/behavior_rb.html">railties/lib/rails/command/behavior.rb</a></li>
<li><a href="../files/railties/lib/rails/command/environment_argument_rb.html">railties/lib/rails/command/environment_argument.rb</a></li>
<li><a href="../files/railties/lib/rails/command/helpers/editor_rb.html">railties/lib/rails/command/helpers/editor.rb</a></li>
<li><a href="../files/railties/lib/rails/commands_rb.html">railties/lib/rails/commands.rb</a></li>
<li><a href="../files/railties/lib/rails/commands/about/about_command_rb.html">railties/lib/rails/commands/about/about_command.rb</a></li>
<li><a href="../files/railties/lib/rails/commands/app/update_command_rb.html">railties/lib/rails/commands/app/update_command.rb</a></li>
<li><a href="../files/railties/lib/rails/commands/application/application_command_rb.html">railties/lib/rails/commands/application/application_command.rb</a></li>
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<li><a href="../files/railties/lib/rails/commands/console/irb_console_rb.html">railties/lib/rails/commands/console/irb_console.rb</a></li>
<li><a href="../files/railties/lib/rails/commands/credentials/credentials_command_rb.html">railties/lib/rails/commands/credentials/credentials_command.rb</a></li>
<li><a href="../files/railties/lib/rails/commands/credentials/credentials_command/diffing_rb.html">railties/lib/rails/commands/credentials/credentials_command/diffing.rb</a></li>
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<li><a href="../files/railties/lib/rails/commands/dbconsole/dbconsole_command_rb.html">railties/lib/rails/commands/dbconsole/dbconsole_command.rb</a></li>
<li><a href="../files/railties/lib/rails/commands/destroy/destroy_command_rb.html">railties/lib/rails/commands/destroy/destroy_command.rb</a></li>
<li><a href="../files/railties/lib/rails/commands/dev/dev_command_rb.html">railties/lib/rails/commands/dev/dev_command.rb</a></li>
<li><a href="../files/railties/lib/rails/commands/devcontainer/devcontainer_command_rb.html">railties/lib/rails/commands/devcontainer/devcontainer_command.rb</a></li>
<li><a href="../files/railties/lib/rails/commands/encrypted/encrypted_command_rb.html">railties/lib/rails/commands/encrypted/encrypted_command.rb</a></li>
<li><a href="../files/railties/lib/rails/commands/gem_help/gem_help_command_rb.html">railties/lib/rails/commands/gem_help/gem_help_command.rb</a></li>
<li><a href="../files/railties/lib/rails/commands/generate/generate_command_rb.html">railties/lib/rails/commands/generate/generate_command.rb</a></li>
<li><a href="../files/railties/lib/rails/commands/help/help_command_rb.html">railties/lib/rails/commands/help/help_command.rb</a></li>
<li><a href="../files/railties/lib/rails/commands/initializers/initializers_command_rb.html">railties/lib/rails/commands/initializers/initializers_command.rb</a></li>
<li><a href="../files/railties/lib/rails/commands/middleware/middleware_command_rb.html">railties/lib/rails/commands/middleware/middleware_command.rb</a></li>
<li><a href="../files/railties/lib/rails/commands/new/new_command_rb.html">railties/lib/rails/commands/new/new_command.rb</a></li>
<li><a href="../files/railties/lib/rails/commands/notes/notes_command_rb.html">railties/lib/rails/commands/notes/notes_command.rb</a></li>
<li><a href="../files/railties/lib/rails/commands/plugin/plugin_command_rb.html">railties/lib/rails/commands/plugin/plugin_command.rb</a></li>
<li><a href="../files/railties/lib/rails/commands/rake/rake_command_rb.html">railties/lib/rails/commands/rake/rake_command.rb</a></li>
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<li><a href="../files/railties/lib/rails/commands/routes/routes_command_rb.html">railties/lib/rails/commands/routes/routes_command.rb</a></li>
<li><a href="../files/railties/lib/rails/commands/runner/runner_command_rb.html">railties/lib/rails/commands/runner/runner_command.rb</a></li>
<li><a href="../files/railties/lib/rails/commands/secret/secret_command_rb.html">railties/lib/rails/commands/secret/secret_command.rb</a></li>
<li><a href="../files/railties/lib/rails/commands/server/server_command_rb.html">railties/lib/rails/commands/server/server_command.rb</a></li>
<li><a href="../files/railties/lib/rails/commands/stats/stats_command_rb.html">railties/lib/rails/commands/stats/stats_command.rb</a></li>
<li><a href="../files/railties/lib/rails/commands/test/test_command_rb.html">railties/lib/rails/commands/test/test_command.rb</a></li>
<li><a href="../files/railties/lib/rails/commands/unused_routes/unused_routes_command_rb.html">railties/lib/rails/commands/unused_routes/unused_routes_command.rb</a></li>
<li><a href="../files/railties/lib/rails/commands/version/version_command_rb.html">railties/lib/rails/commands/version/version_command.rb</a></li>
<li><a href="../files/railties/lib/rails/configuration_rb.html">railties/lib/rails/configuration.rb</a></li>
<li><a href="../files/railties/lib/rails/deprecator_rb.html">railties/lib/rails/deprecator.rb</a></li>
<li><a href="../files/railties/lib/rails/dev_caching_rb.html">railties/lib/rails/dev_caching.rb</a></li>
<li><a href="../files/railties/lib/rails/engine_rb.html">railties/lib/rails/engine.rb</a></li>
<li><a href="../files/railties/lib/rails/engine/configuration_rb.html">railties/lib/rails/engine/configuration.rb</a></li>
<li><a href="../files/railties/lib/rails/engine/lazy_route_set_rb.html">railties/lib/rails/engine/lazy_route_set.rb</a></li>
<li><a href="../files/railties/lib/rails/engine/railties_rb.html">railties/lib/rails/engine/railties.rb</a></li>
<li><a href="../files/railties/lib/rails/engine/updater_rb.html">railties/lib/rails/engine/updater.rb</a></li>
<li><a href="../files/railties/lib/rails/gem_version_rb.html">railties/lib/rails/gem_version.rb</a></li>
<li><a href="../files/railties/lib/rails/generators_rb.html">railties/lib/rails/generators.rb</a></li>
<li><a href="../files/railties/lib/rails/generators/actions_rb.html">railties/lib/rails/generators/actions.rb</a></li>
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<li><a href="../files/railties/lib/rails/generators/active_model_rb.html">railties/lib/rails/generators/active_model.rb</a></li>
<li><a href="../files/railties/lib/rails/generators/app_base_rb.html">railties/lib/rails/generators/app_base.rb</a></li>
<li><a href="../files/railties/lib/rails/generators/app_name_rb.html">railties/lib/rails/generators/app_name.rb</a></li>
<li><a href="../files/railties/lib/rails/generators/base_rb.html">railties/lib/rails/generators/base.rb</a></li>
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<li><a href="../files/railties/lib/rails/generators/generated_attribute_rb.html">railties/lib/rails/generators/generated_attribute.rb</a></li>
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<li><a href="../files/railties/lib/rails/generators/model_helpers_rb.html">railties/lib/rails/generators/model_helpers.rb</a></li>
<li><a href="../files/railties/lib/rails/generators/named_base_rb.html">railties/lib/rails/generators/named_base.rb</a></li>
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<li><a href="../files/railties/lib/rails/generators/rails/application_record/application_record_generator_rb.html">railties/lib/rails/generators/rails/application_record/application_record_generator.rb</a></li>
<li><a href="../files/railties/lib/rails/generators/rails/authentication/authentication_generator_rb.html">railties/lib/rails/generators/rails/authentication/authentication_generator.rb</a></li>
<li><a href="../files/railties/lib/rails/generators/rails/benchmark/benchmark_generator_rb.html">railties/lib/rails/generators/rails/benchmark/benchmark_generator.rb</a></li>
<li><a href="../files/railties/lib/rails/generators/rails/controller/controller_generator_rb.html">railties/lib/rails/generators/rails/controller/controller_generator.rb</a></li>
<li><a href="../files/railties/lib/rails/generators/rails/credentials/credentials_generator_rb.html">railties/lib/rails/generators/rails/credentials/credentials_generator.rb</a></li>
<li><a href="../files/railties/lib/rails/generators/rails/db/system/change/change_generator_rb.html">railties/lib/rails/generators/rails/db/system/change/change_generator.rb</a></li>
<li><a href="../files/railties/lib/rails/generators/rails/devcontainer/devcontainer_generator_rb.html">railties/lib/rails/generators/rails/devcontainer/devcontainer_generator.rb</a></li>
<li><a href="../files/railties/lib/rails/generators/rails/encrypted_file/encrypted_file_generator_rb.html">railties/lib/rails/generators/rails/encrypted_file/encrypted_file_generator.rb</a></li>
<li><a href="../files/railties/lib/rails/generators/rails/encryption_key_file/encryption_key_file_generator_rb.html">railties/lib/rails/generators/rails/encryption_key_file/encryption_key_file_generator.rb</a></li>
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<li><a href="../files/railties/lib/rails/generators/rails/integration_test/integration_test_generator_rb.html">railties/lib/rails/generators/rails/integration_test/integration_test_generator.rb</a></li>
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<li><a href="../files/railties/lib/rails/generators/rails/migration/migration_generator_rb.html">railties/lib/rails/generators/rails/migration/migration_generator.rb</a></li>
<li><a href="../files/railties/lib/rails/generators/rails/model/model_generator_rb.html">railties/lib/rails/generators/rails/model/model_generator.rb</a></li>
<li><a href="../files/railties/lib/rails/generators/rails/plugin/plugin_generator_rb.html">railties/lib/rails/generators/rails/plugin/plugin_generator.rb</a></li>
<li><a href="../files/railties/lib/rails/generators/rails/resource/resource_generator_rb.html">railties/lib/rails/generators/rails/resource/resource_generator.rb</a></li>
<li><a href="../files/railties/lib/rails/generators/rails/resource_route/resource_route_generator_rb.html">railties/lib/rails/generators/rails/resource_route/resource_route_generator.rb</a></li>
<li><a href="../files/railties/lib/rails/generators/rails/scaffold/scaffold_generator_rb.html">railties/lib/rails/generators/rails/scaffold/scaffold_generator.rb</a></li>
<li><a href="../files/railties/lib/rails/generators/rails/scaffold_controller/scaffold_controller_generator_rb.html">railties/lib/rails/generators/rails/scaffold_controller/scaffold_controller_generator.rb</a></li>
<li><a href="../files/railties/lib/rails/generators/rails/script/script_generator_rb.html">railties/lib/rails/generators/rails/script/script_generator.rb</a></li>
<li><a href="../files/railties/lib/rails/generators/rails/system_test/system_test_generator_rb.html">railties/lib/rails/generators/rails/system_test/system_test_generator.rb</a></li>
<li><a href="../files/railties/lib/rails/generators/rails/task/task_generator_rb.html">railties/lib/rails/generators/rails/task/task_generator.rb</a></li>
<li><a href="../files/railties/lib/rails/generators/resource_helpers_rb.html">railties/lib/rails/generators/resource_helpers.rb</a></li>
<li><a href="../files/railties/lib/rails/generators/test_case_rb.html">railties/lib/rails/generators/test_case.rb</a></li>
<li><a href="../files/railties/lib/rails/generators/testing/assertions_rb.html">railties/lib/rails/generators/testing/assertions.rb</a></li>
<li><a href="../files/railties/lib/rails/generators/testing/behavior_rb.html">railties/lib/rails/generators/testing/behavior.rb</a></li>
<li><a href="../files/railties/lib/rails/generators/testing/setup_and_teardown_rb.html">railties/lib/rails/generators/testing/setup_and_teardown.rb</a></li>
<li><a href="../files/railties/lib/rails/health_controller_rb.html">railties/lib/rails/health_controller.rb</a></li>
<li><a href="../files/railties/lib/rails/info_rb.html">railties/lib/rails/info.rb</a></li>
<li><a href="../files/railties/lib/rails/info_controller_rb.html">railties/lib/rails/info_controller.rb</a></li>
<li><a href="../files/railties/lib/rails/initializable_rb.html">railties/lib/rails/initializable.rb</a></li>
<li><a href="../files/railties/lib/rails/mailers_controller_rb.html">railties/lib/rails/mailers_controller.rb</a></li>
<li><a href="../files/railties/lib/rails/paths_rb.html">railties/lib/rails/paths.rb</a></li>
<li><a href="../files/railties/lib/rails/plugin/test_rb.html">railties/lib/rails/plugin/test.rb</a></li>
<li><a href="../files/railties/lib/rails/pwa_controller_rb.html">railties/lib/rails/pwa_controller.rb</a></li>
<li><a href="../files/railties/lib/rails/rack_rb.html">railties/lib/rails/rack.rb</a></li>
<li><a href="../files/railties/lib/rails/rack/logger_rb.html">railties/lib/rails/rack/logger.rb</a></li>
<li><a href="../files/railties/lib/rails/rack/silence_request_rb.html">railties/lib/rails/rack/silence_request.rb</a></li>
<li><a href="../files/railties/lib/rails/railtie_rb.html">railties/lib/rails/railtie.rb</a></li>
<li><a href="../files/railties/lib/rails/railtie/configurable_rb.html">railties/lib/rails/railtie/configurable.rb</a></li>
<li><a href="../files/railties/lib/rails/railtie/configuration_rb.html">railties/lib/rails/railtie/configuration.rb</a></li>
<li><a href="../files/railties/lib/rails/source_annotation_extractor_rb.html">railties/lib/rails/source_annotation_extractor.rb</a></li>
<li><a href="../files/railties/lib/rails/version_rb.html">railties/lib/rails/version.rb</a></li>
<li><a href="../files/railties/lib/rails/welcome_controller_rb.html">railties/lib/rails/welcome_controller.rb</a></li>
<li><a href="../files/railties/lib/rails/zeitwerk_checker_rb.html">railties/lib/rails/zeitwerk_checker.rb</a></li>
</ul>
</div>
<div id="bodyContent">
<div id="content">
<div class="description">
<h1 id="module-Rails-label-Railties+--+Gluing+the+Engine+to+the+Rails">Railties – Gluing the <a href="Rails/Engine.html"><code>Engine</code></a> to the Rails</h1>
<p>Railties is responsible for gluing all frameworks together. Overall, it:</p>
<ul><li>
<p>handles the bootstrapping process for a Rails application;</p>
</li><li>
<p>manages the <code>rails</code> command line interface;</p>
</li><li>
<p>and provides the Rails generators core.</p>
</li></ul>
<h2 id="module-Rails-label-Download">Download</h2>
<p>The latest version of Railties can be installed with RubyGems:</p>
<ul><li>
<p>gem install railties</p>
</li></ul>
<p>Source code can be downloaded as part of the Rails project on GitHub</p>
<ul><li>
<p><a href="https://github.com/rails/rails/tree/main/railties">github.com/rails/rails/tree/main/railties</a></p>
</li></ul>
<h2 id="module-Rails-label-License">License</h2>
<p>Railties is released under the MIT license:</p>
<ul><li>
<p><a href="https://opensource.org/licenses/MIT">opensource.org/licenses/MIT</a></p>
</li></ul>
<h2 id="module-Rails-label-Support">Support</h2>
<p><a href="Rails/API.html"><code>API</code></a> documentation is at</p>
<ul><li>
<p><a href="https://api.rubyonrails.org">api.rubyonrails.org</a></p>
</li></ul>
<p>Bug reports can be filed for the Ruby on Rails project here:</p>
<ul><li>
<p><a href="https://github.com/rails/rails/issues">github.com/rails/rails/issues</a></p>
</li></ul>
<p>Feature requests should be discussed on the rails-core mailing list here:</p>
<ul><li>
<p><a href="https://discuss.rubyonrails.org/c/rubyonrails-core">discuss.rubyonrails.org/c/rubyonrails-core</a></p>
</li></ul>
</div>
<h2 id="namespace">Namespace</h2>
<h3 id="module">Module</h3>
<ul>
<li><a href="Rails/API.html">Rails::API</a></li>
<li><a href="Rails/Command.html">Rails::Command</a></li>
<li><a href="Rails/Configuration.html">Rails::Configuration</a></li>
<li><a href="Rails/Generators.html">Rails::Generators</a></li>
<li><a href="Rails/Info.html">Rails::Info</a></li>
<li><a href="Rails/Initializable.html">Rails::Initializable</a></li>
<li><a href="Rails/Paths.html">Rails::Paths</a></li>
<li><a href="Rails/Rack.html">Rails::Rack</a></li>
<li><a href="Rails/VERSION.html">Rails::VERSION</a></li>
</ul>
<h3 id="class">Class</h3>
<ul>
<li><a href="Rails/AppBuilder.html">Rails::AppBuilder</a></li>
<li><a href="Rails/Application.html">Rails::Application</a></li>
<li><a href="Rails/CodeStatistics.html">Rails::CodeStatistics</a></li>
<li><a href="Rails/Console.html">Rails::Console</a></li>
<li><a href="Rails/DBConsole.html">Rails::DBConsole</a></li>
<li><a href="Rails/Engine.html">Rails::Engine</a></li>
<li><a href="Rails/HealthController.html">Rails::HealthController</a></li>
<li><a href="Rails/PluginBuilder.html">Rails::PluginBuilder</a></li>
<li><a href="Rails/Railtie.html">Rails::Railtie</a></li>
<li><a href="Rails/Server.html">Rails::Server</a></li>
<li><a href="Rails/SourceAnnotationExtractor.html">Rails::SourceAnnotationExtractor</a></li>
</ul>
<h2 id="methods">Methods</h2>
<ul>
<li>
<a href="#method-c-application">application</a>
</li>
<li>
<a href="#method-c-autoloaders">autoloaders</a>
</li>
<li>
<a href="#method-c-backtrace_cleaner">backtrace_cleaner</a>
</li>
<li>
<a href="#method-c-configuration">configuration</a>
</li>
<li>
<a href="#method-c-env">env</a>
</li>
<li>
<a href="#method-c-env-3D">env=</a>
</li>
<li>
<a href="#method-c-error">error</a>
</li>
<li>
<a href="#method-c-gem_version">gem_version</a>
</li>
<li>
<a href="#method-c-groups">groups</a>
</li>
<li>
<a href="#method-c-public_path">public_path</a>
</li>
<li>
<a href="#method-c-root">root</a>
</li>
<li>
<a href="#method-c-version">version</a>
</li>
</ul>
<!-- Section attributes -->
<h2 id="attributes">Attributes</h2>
<table border='0' cellpadding='5'>
<tr valign='top'>
<td class='attr-rw'>
[RW]
</td>
<td class='attr-name'>app_class</td>
<td class='attr-desc'></td>
</tr>
<tr valign='top'>
<td class='attr-rw'>
[W]
</td>
<td class='attr-name'>application</td>
<td class='attr-desc'></td>
</tr>
<tr valign='top'>
<td class='attr-rw'>
[RW]
</td>
<td class='attr-name'>cache</td>
<td class='attr-desc'></td>
</tr>
<tr valign='top'>
<td class='attr-rw'>
[RW]
</td>
<td class='attr-name'>logger</td>
<td class='attr-desc'></td>
</tr>
</table>
<!-- Methods -->
<h2 id="class-public-methods">Class Public methods</h2>
<div class="method">
<h3 id="method-c-application">
application()
</h3>
<div class="description">
</div>
<details class="method__source">
<summary>
<span class="label">📝 Source code</span>
</summary>
<pre><code class="ruby"># File railties/lib/rails.rb, line 45
def application
@application ||= (app_class.instance if app_class)
end</code></pre>
<a href="https://github.com/rails/rails/blob/dd8f7185faeca6ee968a6e9367f6d8601a83b8db/railties/lib/rails.rb#L45" target="_blank" class="github_url">🔎 See on GitHub</a>
</details>
</div>
<div class="method">
<h3 id="method-c-autoloaders">
autoloaders()
</h3>
<div class="description">
</div>
<details class="method__source">
<summary>
<span class="label">📝 Source code</span>
</summary>
<pre><code class="ruby"># File railties/lib/rails.rb, line 126
def autoloaders
application.autoloaders
end</code></pre>
<a href="https://github.com/rails/rails/blob/dd8f7185faeca6ee968a6e9367f6d8601a83b8db/railties/lib/rails.rb#L126" target="_blank" class="github_url">🔎 See on GitHub</a>
</details>
</div>
<div class="method">
<h3 id="method-c-backtrace_cleaner">
backtrace_cleaner()
</h3>
<div class="description">
</div>
<details class="method__source">
<summary>
<span class="label">📝 Source code</span>
</summary>
<pre><code class="ruby"># File railties/lib/rails.rb, line 56
def backtrace_cleaner
@backtrace_cleaner ||= Rails::BacktraceCleaner.new
end</code></pre>
<a href="https://github.com/rails/rails/blob/dd8f7185faeca6ee968a6e9367f6d8601a83b8db/railties/lib/rails.rb#L56" target="_blank" class="github_url">🔎 See on GitHub</a>
</details>
</div>
<div class="method">
<h3 id="method-c-configuration">
configuration()
</h3>
<div class="description">
<p>The <a href="Rails/Configuration.html"><code>Configuration</code></a> instance used to configure the Rails environment</p>
</div>
<details class="method__source">
<summary>
<span class="label">📝 Source code</span>
</summary>
<pre><code class="ruby"># File railties/lib/rails.rb, line 52
def configuration
application.config
end</code></pre>
<a href="https://github.com/rails/rails/blob/dd8f7185faeca6ee968a6e9367f6d8601a83b8db/railties/lib/rails.rb#L52" target="_blank" class="github_url">🔎 See on GitHub</a>
</details>
</div>
<div class="method">
<h3 id="method-c-env">
env()
</h3>
<div class="description">
<p>Returns the current Rails environment.</p>
<pre><code>Rails.env # => "development"
Rails.env.development? # => true
Rails.env.production? # => false
Rails.env.local? # => true true for "development" and "test", false for anything else
</code></pre>
</div>
<details class="method__source">
<summary>
<span class="label">📝 Source code</span>
</summary>
<pre><code class="ruby"># File railties/lib/rails.rb, line 75
def env
@_env ||= ActiveSupport::EnvironmentInquirer.new(ENV["RAILS_ENV"].presence || ENV["RACK_ENV"].presence || "development")
end</code></pre>
<a href="https://github.com/rails/rails/blob/dd8f7185faeca6ee968a6e9367f6d8601a83b8db/railties/lib/rails.rb#L75" target="_blank" class="github_url">🔎 See on GitHub</a>
</details>
</div>
<div class="method">
<h3 id="method-c-env-3D">
env=(environment)
</h3>
<div class="description">
<p>Sets the Rails environment.</p>
<pre><code>Rails.env = "staging" # => "staging"
</code></pre>
</div>
<details class="method__source">
<summary>
<span class="label">📝 Source code</span>
</summary>
<pre><code class="ruby"># File railties/lib/rails.rb, line 82
def env=(environment)
@_env = ActiveSupport::EnvironmentInquirer.new(environment)
end</code></pre>
<a href="https://github.com/rails/rails/blob/dd8f7185faeca6ee968a6e9367f6d8601a83b8db/railties/lib/rails.rb#L82" target="_blank" class="github_url">🔎 See on GitHub</a>
</details>
</div>
<div class="method">
<h3 id="method-c-error">
error()
</h3>
<div class="description">
<p>Returns the <a href="ActiveSupport/ErrorReporter.html"><code>ActiveSupport::ErrorReporter</code></a> of the current Rails project, otherwise it returns <code>nil</code> if there is no project.</p>
<pre><code>Rails.error.handle(IOError) do
# ...
end
Rails.error.report(error)
</code></pre>
</div>
<details class="method__source">
<summary>
<span class="label">📝 Source code</span>
</summary>
<pre><code class="ruby"># File railties/lib/rails.rb, line 93
def error
ActiveSupport.error_reporter
end</code></pre>
<a href="https://github.com/rails/rails/blob/dd8f7185faeca6ee968a6e9367f6d8601a83b8db/railties/lib/rails.rb#L93" target="_blank" class="github_url">🔎 See on GitHub</a>
</details>
</div>
<div class="method">
<h3 id="method-c-gem_version">
gem_version()
</h3>
<div class="description">
<p>Returns the currently loaded version of Rails as a <code>Gem::Version</code>.</p>
</div>
<details class="method__source">
<summary>
<span class="label">📝 Source code</span>
</summary>
<pre><code class="ruby"># File railties/lib/rails/gem_version.rb, line 5
def self.gem_version
Gem::Version.new VERSION::STRING
end</code></pre>
<a href="https://github.com/rails/rails/blob/dd8f7185faeca6ee968a6e9367f6d8601a83b8db/railties/lib/rails/gem_version.rb#L5" target="_blank" class="github_url">🔎 See on GitHub</a>
</details>
</div>
<div class="method">
<h3 id="method-c-groups">
groups(*groups)
</h3>
<div class="description">
<p>Returns all Rails groups for loading based on:</p>
<ul><li>
<p>The Rails environment;</p>
</li><li>
<p>The environment variable RAILS_GROUPS;</p>
</li><li>
<p>The optional envs given as argument and the hash with group dependencies;</p>
</li></ul>
<pre><code>Rails.groups assets: [:development, :test]
# => [:default, "development", :assets] for Rails.env == "development"
# => [:default, "production"] for Rails.env == "production"
</code></pre>
</div>
<details class="method__source">
<summary>
<span class="label">📝 Source code</span>
</summary>
<pre><code class="ruby"># File railties/lib/rails.rb, line 106
def groups(*groups)
hash = groups.extract_options!
env = Rails.env
groups.unshift(:default, env)
groups.concat ENV["RAILS_GROUPS"].to_s.split(",")
groups.concat hash.map { |k, v| k if v.map(&:to_s).include?(env) }
groups.compact!
groups.uniq!
groups
end</code></pre>
<a href="https://github.com/rails/rails/blob/dd8f7185faeca6ee968a6e9367f6d8601a83b8db/railties/lib/rails.rb#L106" target="_blank" class="github_url">🔎 See on GitHub</a>
</details>
</div>
<div class="method">
<h3 id="method-c-public_path">
public_path()
</h3>
<div class="description">
<p>Returns a <a href="Pathname.html"><code>Pathname</code></a> object of the public folder of the current Rails project, otherwise it returns <code>nil</code> if there is no project:</p>
<pre><code>Rails.public_path
# => #<Pathname:/Users/someuser/some/path/project/public>
</code></pre>
</div>
<details class="method__source">
<summary>
<span class="label">📝 Source code</span>
</summary>
<pre><code class="ruby"># File railties/lib/rails.rb, line 122
def public_path
application && Pathname.new(application.paths["public"].first)
end</code></pre>
<a href="https://github.com/rails/rails/blob/dd8f7185faeca6ee968a6e9367f6d8601a83b8db/railties/lib/rails.rb#L122" target="_blank" class="github_url">🔎 See on GitHub</a>
</details>
</div>
<div class="method">
<h3 id="method-c-root">
root()
</h3>
<div class="description">
<p>Returns a <a href="Pathname.html"><code>Pathname</code></a> object of the current Rails project, otherwise it returns <code>nil</code> if there is no project:</p>
<pre><code>Rails.root
# => #<Pathname:/Users/someuser/some/path/project>
</code></pre>
</div>
<details class="method__source">
<summary>
<span class="label">📝 Source code</span>
</summary>
<pre><code class="ruby"># File railties/lib/rails.rb, line 65
def root
application && application.config.root
end</code></pre>
<a href="https://github.com/rails/rails/blob/dd8f7185faeca6ee968a6e9367f6d8601a83b8db/railties/lib/rails.rb#L65" target="_blank" class="github_url">🔎 See on GitHub</a>
</details>
</div>
<div class="method">
<h3 id="method-c-version">
version()
</h3>
<div class="description">
<p>Returns the currently loaded version of Rails as a string.</p>
</div>
<details class="method__source">
<summary>
<span class="label">📝 Source code</span>
</summary>
<pre><code class="ruby"># File railties/lib/rails/version.rb, line 7
def self.version
VERSION::STRING
end</code></pre>
<a href="https://github.com/rails/rails/blob/dd8f7185faeca6ee968a6e9367f6d8601a83b8db/railties/lib/rails/version.rb#L7" target="_blank" class="github_url">🔎 See on GitHub</a>
</details>
</div>
</div>
</div>
</div>