Warning: Could not validate input data for XX as there are no Registration Scope records that correspond to this registration. No changes have been applied to this record. - When starting Manage
Ruby on Rails 4.0 Release Notes — Ruby on Rails Guides
Active record uniqueness validations with a given scope · Ruby & Elixir MobiDev Team Blog
Understanding Scopes in Rails. Understanding Rails Scopes and Class… | by Boula Akladyous | Medium
ActiveRecord Scopes & Arel - Speaker Deck
Difference Between Scope vs Class Method | Ruby on Rails Tutorial - YouTube
ActiveRecord Scopes & Arel - Speaker Deck
Part 10: Domain Scope: Session Scope versus Record Scope | by Prashant Kumar LearnIT | Medium
Active record(1) | PPT
Scopes - How to use in Ruby on Rails ? - Episode 2 | by Rıza Doğukan Koşar | Medium
How to Use Scopes in Ruby on Rails (Complete Guide)
ActiveRecordにおけるScopeのつかいどき - ボクココ
Active record(1) | PPT
ActiveRecord Scopes & Arel - Speaker Deck
ActiveRecord scope with first returns all records · Issue #13647 · rails/ rails · GitHub
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