[教育訓練] Rails Validation Basic

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1. Rails Validation 徐赫謙
2. Rails Validation Basic
3. 會經過驗證的 • create • create! • save • save! • update • update_attributes • update_attributes!
4. 注意 • 有驚嘆號的(save!)驗證失敗會丟例外 • 沒驚嘆號的驗證失敗會回傳 • false: save, update_attributes • 物件: create, update
5. 不會經過驗證的 decrement! • decrement_counter • increment! • increment_counter • toggle! • touch • update_all • update_attribute • update_column • update_counters
6. ⼿手動跟驗證說掰掰 save({validate: false})
7. Demo https://gist.github.com/3508269#file_02_demo.rb
8. valid? invalid? https://gist.github.com/3508269#file_01_valid_invalid.rb
9. errors[] https://gist.github.com/3508269#file_01_valid_invalid.rb
10. helpers • acceptance • confirmation • exclusion • format • uniqueness • inclusion • length • numericality • presence • size • validates_associated
11. Example https://gist.github.com/3508269#file_04_demo.rb