Rails Validation 徐赫謙 

Rails Validation Basic 

會經過驗證的 • create • create! • save • save! • update • update_attributes • update_attributes! 

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 

不會經過驗證的 decrement! • decrement_counter • increment! • increment_counter • toggle! • touch • update_all • update_attribute • update_column • update_counters 

⼿手動跟驗證說掰掰 save({validate: false}) 

Demo https://gist.github.com/3508269#file_02_demo.rb 

valid? invalid? https://gist.github.com/3508269#file_01_valid_invalid.rb 

errors[] https://gist.github.com/3508269#file_01_valid_invalid.rb 

helpers • acceptance • confirmation • exclusion • format • uniqueness • inclusion • length • numericality • presence • size • validates_associated 

Example https://gist.github.com/3508269#file_04_demo.rb