Question 1

How to make Bullet raise errors in Rails tests?

Accepted Answer

Set Bullet.raise = true in the test environment configuration, and wrap each test with Bullet.start_request and Bullet.end_request, as shown in the README for RSpec or Minitest integration. This causes tests to fail if N+1 queries are detected.

Question 2

Bullet vs rack-mini-profiler for Rails performance?

Accepted Answer

Bullet specializes in detecting specific query inefficiencies like N+1 queries and unused eager loading, while rack-mini-profiler provides broader performance profiling including SQL timing and stack traces. Use Bullet for targeted query optimization and rack-mini-profiler for overall performance analysis.

Question 3

Why is Bullet not showing alerts in my browser?

Accepted Answer

Ensure browser cache is disabled, as noted in the README's 'Important' section, and check that Bullet.skip_html_injection is false. Also, verify that the configuration is correctly loaded in the development environment.

Question 4

How to ignore certain queries in Bullet?

Accepted Answer

Use Bullet.add_safelist to specify associations or query types to ignore, such as for N+1 queries or unused eager loading, as detailed in the safe listing configuration. This prevents false positives from custom code.

Question 5

Can Bullet work with background jobs like Sidekiq?

Accepted Answer

Yes, include Bullet::ActiveJob in ApplicationJob or use Bullet.profile in an around_perform block for other job solutions, as explained in the 'Work with ActiveJob' and background job sections of the README.

Question 6

How to configure Bullet for Slack notifications?

Accepted Answer

Set Bullet.slack with webhook_url, channel, and username in the initializer, following the example in the configuration section. This sends alerts to a Slack channel when query issues are detected.

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