Il file js.erb di Rails non trova il metodo “render”

Ho il seguente codice in un file ERB Javascript:

$(document).ready(function() { $("#workout-week").append(  "show_training_period", :locals => { :period => @period }) %> ); }); 

Quando sono arrivato alla vista, ho ricevuto il seguente errore:

 undefined method `render' for #<#:0x00000005dbfe98> 

Il partial esiste e la variabile locale è non nulla. Qualche idea sul perché questo potrebbe accadere?

Traccia dello stack:

 app/assets/javascripts/slider.js.erb:2:in `evaluate_source' tilt (1.3.3) lib/tilt/template.rb:209:in `instance_eval' tilt (1.3.3) lib/tilt/template.rb:209:in `evaluate_source' tilt (1.3.3) lib/tilt/template.rb:144:in `cached_evaluate' tilt (1.3.3) lib/tilt/template.rb:127:in `evaluate' tilt (1.3.3) lib/tilt/template.rb:76:in `render' sprockets (2.0.3) lib/sprockets/context.rb:175:in `block in evaluate' sprockets (2.0.3) lib/sprockets/context.rb:172:in `each' sprockets (2.0.3) lib/sprockets/context.rb:172:in `evaluate' sprockets (2.0.3) lib/sprockets/bundled_asset.rb:171:in `build_dependency_context_and_body' sprockets (2.0.3) lib/sprockets/bundled_asset.rb:135:in `dependency_context' sprockets (2.0.3) lib/sprockets/bundled_asset.rb:194:in `build_dependencies_paths_and_assets' sprockets (2.0.3) lib/sprockets/bundled_asset.rb:141:in `dependency_paths' sprockets (2.0.3) lib/sprockets/bundled_asset.rb:61:in `mtime' sprockets (2.0.3) lib/sprockets/asset.rb:58:in `block in encode_with' sprockets (2.0.3) lib/sprockets/asset.rb:57:in `each' sprockets (2.0.3) lib/sprockets/asset.rb:57:in `encode_with' sprockets (2.0.3) lib/sprockets/bundled_asset.rb:43:in `encode_with' sprockets (2.0.3) lib/sprockets/caching.rb:52:in `cache_asset' sprockets (2.0.3) lib/sprockets/environment.rb:82:in `build_asset' sprockets (2.0.3) lib/sprockets/base.rb:99:in `find_asset' sprockets (2.0.3) lib/sprockets/environment.rb:72:in `find_asset' sprockets (2.0.3) lib/sprockets/base.rb:110:in `[]' sprockets (2.0.3) lib/sprockets/bundled_asset.rb:200:in `block in build_dependencies_paths_and_assets' sprockets (2.0.3) lib/sprockets/bundled_asset.rb:194:in `each' sprockets (2.0.3) lib/sprockets/bundled_asset.rb:194:in `build_dependencies_paths_and_assets' sprockets (2.0.3) lib/sprockets/bundled_asset.rb:141:in `dependency_paths' sprockets (2.0.3) lib/sprockets/bundled_asset.rb:61:in `mtime' sprockets (2.0.3) lib/sprockets/asset.rb:58:in `block in encode_with' sprockets (2.0.3) lib/sprockets/asset.rb:57:in `each' sprockets (2.0.3) lib/sprockets/asset.rb:57:in `encode_with' sprockets (2.0.3) lib/sprockets/bundled_asset.rb:43:in `encode_with' sprockets (2.0.3) lib/sprockets/caching.rb:52:in `cache_asset' sprockets (2.0.3) lib/sprockets/environment.rb:82:in `build_asset' sprockets (2.0.3) lib/sprockets/trail.rb:102:in `find_asset_in_path' sprockets (2.0.3) lib/sprockets/base.rb:101:in `find_asset' sprockets (2.0.3) lib/sprockets/environment.rb:72:in `find_asset' sprockets (2.0.3) lib/sprockets/base.rb:110:in `[]' actionpack (3.1.0) lib/sprockets/helpers/rails_helper.rb:124:in `asset_for' actionpack (3.1.0) lib/sprockets/helpers/rails_helper.rb:28:in `block in javascript_include_tag' actionpack (3.1.0) lib/sprockets/helpers/rails_helper.rb:27:in `collect' actionpack (3.1.0) lib/sprockets/helpers/rails_helper.rb:27:in `javascript_include_tag' app/views/layouts/application.html.haml:7:in `_app_views_layouts_application_html_haml__2778507683501201875_51020080' actionpack (3.1.0) lib/action_view/template.rb:144:in `block in render' activesupport (3.1.0) lib/active_support/notifications.rb:55:in `instrument' actionpack (3.1.0) lib/action_view/template.rb:142:in `render' actionpack (3.1.0) lib/action_view/renderer/template_renderer.rb:52:in `render_with_layout' actionpack (3.1.0) lib/action_view/renderer/template_renderer.rb:38:in `render_template' actionpack (3.1.0) lib/action_view/renderer/template_renderer.rb:12:in `block in render' actionpack (3.1.0) lib/action_view/renderer/abstract_renderer.rb:22:in `wrap_formats' actionpack (3.1.0) lib/action_view/renderer/template_renderer.rb:9:in `render' actionpack (3.1.0) lib/action_view/renderer/renderer.rb:36:in `render_template' actionpack (3.1.0) lib/action_view/renderer/renderer.rb:17:in `render' actionpack (3.1.0) lib/abstract_controller/rendering.rb:120:in `_render_template' actionpack (3.1.0) lib/action_controller/metal/streaming.rb:250:in `_render_template' actionpack (3.1.0) lib/abstract_controller/rendering.rb:114:in `render_to_body' actionpack (3.1.0) lib/action_controller/metal/renderers.rb:30:in `render_to_body' actionpack (3.1.0) lib/action_controller/metal/compatibility.rb:43:in `render_to_body' actionpack (3.1.0) lib/abstract_controller/rendering.rb:99:in `render' actionpack (3.1.0) lib/action_controller/metal/rendering.rb:16:in `render' actionpack (3.1.0) lib/action_controller/metal/instrumentation.rb:40:in `block (2 levels) in render' activesupport (3.1.0) lib/active_support/core_ext/benchmark.rb:5:in `block in ms' /home/mike/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/benchmark.rb:310:in `realtime' activesupport (3.1.0) lib/active_support/core_ext/benchmark.rb:5:in `ms' actionpack (3.1.0) lib/action_controller/metal/instrumentation.rb:40:in `block in render' actionpack (3.1.0) lib/action_controller/metal/instrumentation.rb:78:in `cleanup_view_runtime' activerecord (3.1.0) lib/active_record/railties/controller_runtime.rb:24:in `cleanup_view_runtime' actionpack (3.1.0) lib/action_controller/metal/instrumentation.rb:39:in `render' actionpack (3.1.0) lib/action_controller/metal/implicit_render.rb:10:in `default_render' actionpack (3.1.0) lib/action_controller/metal/implicit_render.rb:5:in `send_action' actionpack (3.1.0) lib/abstract_controller/base.rb:167:in `process_action' actionpack (3.1.0) lib/action_controller/metal/rendering.rb:10:in `process_action' actionpack (3.1.0) lib/abstract_controller/callbacks.rb:18:in `block in process_action' activesupport (3.1.0) lib/active_support/callbacks.rb:425:in `_run__4540075312289376507__process_action__207230359584297735__callbacks' activesupport (3.1.0) lib/active_support/callbacks.rb:386:in `_run_process_action_callbacks' activesupport (3.1.0) lib/active_support/callbacks.rb:81:in `run_callbacks' actionpack (3.1.0) lib/abstract_controller/callbacks.rb:17:in `process_action' actionpack (3.1.0) lib/action_controller/metal/rescue.rb:17:in `process_action' actionpack (3.1.0) lib/action_controller/metal/instrumentation.rb:30:in `block in process_action' activesupport (3.1.0) lib/active_support/notifications.rb:53:in `block in instrument' activesupport (3.1.0) lib/active_support/notifications/instrumenter.rb:21:in `instrument' activesupport (3.1.0) lib/active_support/notifications.rb:53:in `instrument' actionpack (3.1.0) lib/action_controller/metal/instrumentation.rb:29:in `process_action' actionpack (3.1.0) lib/action_controller/metal/params_wrapper.rb:201:in `process_action' activerecord (3.1.0) lib/active_record/railties/controller_runtime.rb:18:in `process_action' actionpack (3.1.0) lib/abstract_controller/base.rb:121:in `process' actionpack (3.1.0) lib/abstract_controller/rendering.rb:45:in `process' actionpack (3.1.0) lib/action_controller/metal.rb:193:in `dispatch' actionpack (3.1.0) lib/action_controller/metal/rack_delegation.rb:14:in `dispatch' actionpack (3.1.0) lib/action_controller/metal.rb:236:in `block in action' actionpack (3.1.0) lib/action_dispatch/routing/route_set.rb:65:in `call' actionpack (3.1.0) lib/action_dispatch/routing/route_set.rb:65:in `dispatch' actionpack (3.1.0) lib/action_dispatch/routing/route_set.rb:29:in `call' rack-mount (0.8.3) lib/rack/mount/route_set.rb:152:in `block in call' rack-mount (0.8.3) lib/rack/mount/code_generation.rb:96:in `block in recognize' rack-mount (0.8.3) lib/rack/mount/code_generation.rb:75:in `optimized_each' rack-mount (0.8.3) lib/rack/mount/code_generation.rb:95:in `recognize' rack-mount (0.8.3) lib/rack/mount/route_set.rb:141:in `call' actionpack (3.1.0) lib/action_dispatch/routing/route_set.rb:531:in `call' warden (1.1.0) lib/warden/manager.rb:35:in `block in call' warden (1.1.0) lib/warden/manager.rb:34:in `catch' warden (1.1.0) lib/warden/manager.rb:34:in `call' actionpack (3.1.0) lib/action_dispatch/middleware/best_standards_support.rb:17:in `call' rack (1.3.5) lib/rack/etag.rb:23:in `call' rack (1.3.5) lib/rack/conditionalget.rb:25:in `call' actionpack (3.1.0) lib/action_dispatch/middleware/head.rb:14:in `call' actionpack (3.1.0) lib/action_dispatch/middleware/params_parser.rb:21:in `call' actionpack (3.1.0) lib/action_dispatch/middleware/flash.rb:243:in `call' rack (1.3.5) lib/rack/session/abstract/id.rb:195:in `context' rack (1.3.5) lib/rack/session/abstract/id.rb:190:in `call' actionpack (3.1.0) lib/action_dispatch/middleware/cookies.rb:326:in `call' activerecord (3.1.0) lib/active_record/query_cache.rb:62:in `call' activerecord (3.1.0) lib/active_record/connection_adapters/abstract/connection_pool.rb:477:in `call' actionpack (3.1.0) lib/action_dispatch/middleware/callbacks.rb:29:in `block in call' activesupport (3.1.0) lib/active_support/callbacks.rb:392:in `_run_call_callbacks' activesupport (3.1.0) lib/active_support/callbacks.rb:81:in `run_callbacks' actionpack (3.1.0) lib/action_dispatch/middleware/callbacks.rb:28:in `call' actionpack (3.1.0) lib/action_dispatch/middleware/reloader.rb:68:in `call' rack (1.3.5) lib/rack/sendfile.rb:101:in `call' actionpack (3.1.0) lib/action_dispatch/middleware/remote_ip.rb:48:in `call' actionpack (3.1.0) lib/action_dispatch/middleware/show_exceptions.rb:47:in `call' railties (3.1.0) lib/rails/rack/logger.rb:13:in `call' rack (1.3.5) lib/rack/methodoverride.rb:24:in `call' rack (1.3.5) lib/rack/runtime.rb:17:in `call' activesupport (3.1.0) lib/active_support/cache/strategy/local_cache.rb:72:in `call' rack (1.3.5) lib/rack/lock.rb:15:in `call' actionpack (3.1.0) lib/action_dispatch/middleware/static.rb:53:in `call' railties (3.1.0) lib/rails/engine.rb:455:in `call' railties (3.1.0) lib/rails/rack/content_length.rb:16:in `call' railties (3.1.0) lib/rails/rack/log_tailer.rb:14:in `call' rack (1.3.5) lib/rack/handler/webrick.rb:59:in `service' /home/mike/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/webrick/httpserver.rb:111:in `service' /home/mike/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/webrick/httpserver.rb:70:in `run' /home/mike/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/webrick/server.rb:183:in `block in start_thread'