24 min
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Rails Custom Validators: A Practical Guide
Learn Rails custom validators: validation methods, EachValidator classes, options, testing, and database constraints.
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28 min
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Rails Form Objects: When To Use Them
Learn when to use Rails Form Objects, how to build them with ActiveModel::Model, and when a simple model is enough.
21 min
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Rails Enums: A Practical Guide
Learn how Rails enums work: define, map, validate, query, and evolve them safely with practical Active Record examples.
19 min
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Rails Nested Attributes Explained
Learn Rails nested attributes with accepts_nested_attributes_for, fields_for, strong parameters, validations, and security.
23 min
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Rails Callbacks: What You Should Know
Learn how Rails callbacks work, when they run in the Active Record lifecycle, and when to avoid them for cleaner, safer code.
12 min
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Rails Concerns: When And How To Use Them
Learn how Rails Concerns work, when to use ActiveSupport::Concern, and when concerns make your Rails app harder to maintain.
19 min
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Rails Content Security Policy: A Practical Guide
Learn how to configure Rails Content Security Policy, use nonces, test in report-only mode, and fix CSP violations step by step.
23 min
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Rails Active Storage: A Practical Guide
Learn Rails Active Storage: file uploads, has_one_attached, variants, direct uploads, S3, validations, and production tips.
23 min
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How The Rails Request Lifecycle Works
Learn how the Rails request lifecycle works, from the web server and middleware to routing, controllers, views, and the response.
19 min
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How Rails Autoloading Works With Zeitwerk
Learn how Rails autoloading works with Zeitwerk, including naming rules, eager loading, namespaces, and fixing NameError.
11 min
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Rails Scopes: How To Write Better Queries
Learn how Rails scopes make Active Record queries cleaner, reusable, and easier to maintain with practical examples.
18 min
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How Rails Cache Keys Really Work
Learn how Rails cache keys work, including cache_key, cache_key_with_version, fragment caching, and cache invalidation.
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