rails 3 validation on uniqueness on multiple attributes

Question

I use Rails 3 0 0 beta4  I want to add a validation on uniqueness on two attributes  that means that my model is valid if the couple of  recorded at  and  zipcode  is unique   On one attribute here is the syntax  validates  zipcode   uniqueness   gt  true   thanks

User · Answer

Dont work for me  need to put scope in plural     validates uniqueness of  teacher id   scopes      semester id     class id

User · Answer

Multiple Scope Parameters   class TeacherSchedule  lt  ActiveRecord  Base   validates uniqueness of  teacher id   scope   gt    semester id   class id  end   http   apidock com rails ActiveRecord Validations ClassMethods validates uniqueness of  This should answer Greg s question

User · Answer

In Rails 2  I would have written   validates uniqueness of  zipcode   scope   gt   recorded at   In Rails 3   validates  zipcode   uniqueness   gt    scope   gt   recorded at    For multiple attributes   validates  zipcode   uniqueness   gt    scope   gt    recorded at   something else

[ruby-on-rails] rails 3 validation on uniqueness on multiple attributes

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