Section 1: Active Support, Asynchronous Jobs, Mailers & Cloud Storage

📄 Section Lessons

• Lesson 1: 1.1 Active Support: Core Extensions, Timezone Integrity & Metaprogramming Utilities

  Official Guide: Active Support Core Extensions. The comprehensive catalog of all Ruby core class extensions provided by Active Support: Objects, Strings, Arrays, Hashes, Dates, Times, and Enumerable.

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• Lesson 2: 1.2 Action Mailer: Transactional Delivery, Multipart MIME & Asynchronous Pipelines

  Official Guide: Action Mailer Basics. The complete guide to sending emails in Rails: mailer classes, multipart HTML/Text emails, attachments, inline images, interceptors, and previewing.

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• Lesson 3: 1.3 Active Job: Asynchronous Architecture, Backends & Retry Resilience

  Official Guide: Active Job Basics. The complete guide to background job processing in Rails: declaring jobs, queue backends (Solid Queue, Sidekiq), GlobalID serialization, retries, and testing.

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• Lesson 4: 1.4 Active Storage: Multi-Cloud Media, Direct Uploads & CDN Caching

  Official Guide: Active Storage Overview. The complete guide to attaching files to Active Record models: cloud storage providers (S3, GCS, Azure), Direct Uploads, variants with libvips, and proxy serving.

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