Expert guidance for implementing real-time features with Action Cable in Rails applications. Use when working with websockets, channels, subscriptions, broadcasting, live updates, push notifications, or Solid Cable. Covers connection authentication, channel creation, streaming, client-side JS, testing, and deployment. Clarifies when to use Action Cable directly vs Turbo Streams broadcasting.
Expert guidance for writing Rails controllers with Action Controller. Use when writing controller actions, strong parameters, before_action filters, rendering responses, redirects, flash messages, sessions, cookies, rescue_from error handling, streaming, CSRF protection, or HTTP authentication. Covers params permitting (especially nested params — the
Expert guidance for receiving and processing inbound emails with Action Mailbox in Rails. Use when setting up inbound email processing, routing emails to mailboxes, configuring ingress providers (Mailgun, SendGrid, Postfix, etc.), handling attachments, bouncing emails, or testing with fixtures. Covers "action mailbox", "inbound email", "receive email", "process email", "email routing", "mailbox", "incoming email", "email processing", "ingress", "InboundEmail".
Expert guidance for Action Mailer in Rails applications. Use when creating mailers, sending emails, building email templates, configuring delivery, writing mailer previews, or working with transactional email. Triggers on "mailer", "email", "send email", "action mailer", "mail template", "deliver_later", "email notification", "transactional email", "mailer preview", "welcome email", "notification email".
Expert guidance for implementing rich text editing with Action Text in Rails. Use when adding rich text fields, configuring Lexxy or Trix editors, rendering rich text content, handling attachments and embeds, creating custom attachables, styling rich text, or fixing N+1 queries with rich text. Triggers on "action text", "rich text", "lexxy", "trix", "WYSIWYG", "rich text editor", "has_rich_text", "text editor", "rich content", "embedded content", "rich_text_area", "action-text-attachment".
Expert guidance for creating, queuing, and managing background jobs with Active Job and Solid Queue in Rails 8+. Use when creating background jobs, queuing work with perform_later, configuring Solid Queue, handling retries and errors (retry_on, discard_on), sending emails asynchronously (deliver_later), testing jobs, or managing queue priorities. Covers job creation, enqueuing, callbacks, serialization (GlobalID), bulk enqueuing, concurrency controls, recurring tasks, and job continuations.
Build plain Ruby objects that integrate with Rails forms, validations, serialization, and Action Pack — without a database. Use when building form objects, search forms, API wrappers, configuration objects, virtual models, or any PORO that needs model-like behavior. Triggers on "active model", "form object", "plain Ruby object", "non-database model", "ActiveModel", "PORO", "service object validation", "virtual model", "tableless model", "search form", "ActiveModel::API", "ActiveModel::Model".
Expert guidance for defining and using Active Record associations in Rails. Use when creating associations, defining model relationships, troubleshooting foreign keys, fixing N+1 queries, setting up belongs_to, has_many, has_one, has_many :through, polymorphic associations, self-referential joins, join tables, counter caches, dependent options, inverse_of, eager loading, or any question about how models relate to each other.