Fix: TypeError (MAYBE-MARKETING-3R)

[revise-dev]

The error TypeError: nil can't be coerced into Integer occurs because tool.current_rate is returning nil, which cannot be multiplied with the amount value in the view template. The original code was designed to fetch exchange rates from an external service but didn't properly handle cases where the rate fetch fails or returns nil.

Key changes made to fix this:

1. Variable Naming:

   • Changed response to rate in the current_rate method to better reflect the actual value being handled
   • This improves code clarity and makes it more obvious we're dealing with a numeric rate value

2. Nil Handling:

   • Added proper nil handling by returning 0.0 instead of nil when the rate fetch fails
   • Modified both the main return statement and the rescue block to ensure numeric values
   • The rescue block now returns 0.0 instead of nil to maintain consistency

3. Logging Improvements:

   • Updated the debug log message to be more specific about what's being logged
   • Changed "Exchange Rate Response" to "Exchange Rate Rate" to match the new variable name
   • This helps with debugging by making logs more accurate and meaningful

4. Error Handling:

   • Maintained the existing error logging but ensured it returns a safe default value
   • This preserves the ability to debug issues while preventing the TypeError

The original intent of the code was to fetch and cache exchange rates while handling potential API failures. The changes maintain this intent while making the code more robust by ensuring it always returns a numeric value that can be safely used in calculations, even in error conditions.

This fix prevents the TypeError while also providing a more graceful degradation of functionality - when exchange rates can't be fetched, the calculator will show zero instead of crashing with an error.

Error Details

Summary:

TypeError: nil can't be coerced into Integer (TypeError)

Stacktrace:

app/views/tools/widgets/_exchange_rate_calculator.html.erb:46
action_view/helpers/capture_helper.rb:50
action_view/buffers.rb:75
action_view/helpers/capture_helper.rb:50
action_view/helpers/tag_helper.rb:521
action_view/helpers/url_helper.rb:207
app/views/tools/widgets/_exchange_rate_calculator.html.erb:34
action_view/base.rb:281
action_view/base.rb:281
action_view/template.rb:284
active_support/notifications.rb:210
active_support/notifications/instrumenter.rb:58
sentry/rails/tracing.rb:56
active_support/notifications.rb:210
action_view/template.rb:583
action_view/template.rb:272
action_view/renderer/partial_renderer.rb:252
active_support/notifications.rb:210
active_support/notifications/instrumenter.rb:58
sentry/rails/tracing.rb:56
active_support/notifications.rb:210
action_view/renderer/partial_renderer.rb:246
action_view/renderer/partial_renderer.rb:237
action_view/renderer/renderer.rb:78
action_view/renderer/renderer.rb:49
action_view/helpers/rendering_helper.rb:152
action_view/helpers/capture_helper.rb:50
action_view/buffers.rb:75
action_view/helpers/capture_helper.rb:50
action_view/helpers/capture_helper.rb:176
action_view/base.rb:281
action_view/base.rb:281
action_view/template.rb:284
active_support/notifications.rb:210
active_support/notifications/instrumenter.rb:58
sentry/rails/tracing.rb:56
active_support/notifications.rb:210
action_view/template.rb:583
action_view/template.rb:272
action_view/renderer/template_renderer.rb:66
active_support/notifications.rb:210
active_support/notifications/instrumenter.rb:58
sentry/rails/tracing.rb:56
active_support/notifications.rb:210
action_view/renderer/template_renderer.rb:60
action_view/renderer/template_renderer.rb:76
active_support/notifications.rb:210
active_support/notifications/instrumenter.rb:58
sentry/rails/tracing.rb:56
active_support/notifications.rb:210
action_view/renderer/template_renderer.rb:75
action_view/renderer/template_renderer.rb:59
action_view/renderer/template_renderer.rb:11
action_view/renderer/renderer.rb:58
action_view/renderer/renderer.rb:31
action_view/rendering.rb:136
action_view/base.rb:308
action_view/rendering.rb:135
action_controller/metal/streaming.rb:179
action_view/rendering.rb:122
action_controller/metal/rendering.rb:186
action_controller/metal/renderers.rb:140
abstract_controller/rendering.rb:28
action_controller/metal/rendering.rb:167
action_controller/metal/instrumentation.rb:31
active_support/benchmark.rb:17
action_controller/metal/instrumentation.rb:31
action_controller/metal/instrumentation.rb:100
active_record/railties/controller_runtime.rb:46
action_controller/metal/instrumentation.rb:30
meta_tags/controller_helper.rb:22
action_controller/metal/implicit_render.rb:39
action_controller/metal/basic_implicit_render.rb:9
abstract_controller/base.rb:226
action_controller/metal/rendering.rb:193
abstract_controller/callbacks.rb:261
active_support/callbacks.rb:120
turbo-rails.rb:24
/home/deploy/maybe-marketing-prod/shared/bundle/ruby/3.4.0/gems/turbo-rails-2.0.11/app/controllers/concerns/turbo/request_id_tracking.rb:10
active_support/callbacks.rb:129
action_text/rendering.rb:25
action_text/engine.rb:71
active_support/callbacks.rb:129
active_support/callbacks.rb:129
sentry/rails/controller_transaction.rb:21
sentry/hub.rb:115
sentry/span.rb:237
sentry/hub.rb:113
sentry-ruby.rb:507
sentry/rails/controller_transaction.rb:18
active_support/callbacks.rb:129
active_support/callbacks.rb:140
abstract_controller/callbacks.rb:260
action_controller/metal/rescue.rb:27
action_controller/metal/instrumentation.rb:76
active_support/notifications.rb:210
active_support/notifications/instrumenter.rb:58
sentry/rails/tracing.rb:56
active_support/notifications.rb:210
action_controller/metal/instrumentation.rb:75
action_controller/metal/params_wrapper.rb:259
active_record/railties/controller_runtime.rb:39
abstract_controller/base.rb:163
action_view/rendering.rb:40
action_controller/metal.rb:252
action_controller/metal.rb:335
action_dispatch/routing/route_set.rb:67
action_dispatch/routing/route_set.rb:50
action_dispatch/journey/router.rb:53
action_dispatch/journey/router.rb:133
action_dispatch/journey/router.rb:126
action_dispatch/journey/router.rb:126
action_dispatch/journey/router.rb:34
action_dispatch/routing/route_set.rb:908
logtail-rails/error_event.rb:24
logtail-rack/http_events.rb:213
logtail-rack/user_context.rb:74
logtail-rails/session_context.rb:16
logtail-rack/http_context.rb:23
logtail/current_context.rb:120
logtail/current_context.rb:44
logtail-rack/http_context.rb:22
rack/static.rb:161
rack/tempfile_reaper.rb:20
rack/etag.rb:29
rack/conditional_get.rb:31
rack/head.rb:15
action_dispatch/http/permissions_policy.rb:38
action_dispatch/http/content_security_policy.rb:38
rack/session/abstract/id.rb:274
rack/session/abstract/id.rb:268
action_dispatch/middleware/cookies.rb:706
action_dispatch/middleware/callbacks.rb:31
active_support/callbacks.rb:100
action_dispatch/middleware/callbacks.rb:30
sentry/rails/rescued_exception_interceptor.rb:14
action_dispatch/middleware/debug_exceptions.rb:31
sentry/rack/capture_exceptions.rb:30
sentry/hub.rb:269
sentry-ruby.rb:420
sentry/rack/capture_exceptions.rb:21
sentry/hub.rb:59
sentry-ruby.rb:400
sentry/rack/capture_exceptions.rb:20
action_dispatch/middleware/show_exceptions.rb:32
rails/rack/logger.rb:41
rails/rack/logger.rb:29
action_dispatch/middleware/remote_ip.rb:96
action_dispatch/middleware/request_id.rb:34
rack/method_override.rb:28
rack/runtime.rb:24
active_support/cache/strategy/local_cache_middleware.rb:29
action_dispatch/middleware/executor.rb:16
action_dispatch/middleware/static.rb:27
rack/sendfile.rb:114
action_dispatch/middleware/ssl.rb:92
rails/engine.rb:535
puma/configuration.rb:279
puma/request.rb:99
puma/thread_pool.rb:390
puma/request.rb:98
puma/server.rb:472
puma/server.rb:254
puma/thread_pool.rb:167

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