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| -rw-r--r-- | railties/guides/source/active_record_validations_callbacks.textile | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/railties/guides/source/active_record_validations_callbacks.textile b/railties/guides/source/active_record_validations_callbacks.textile index 72ac8d2db9..fc9a2ad30c 100644 --- a/railties/guides/source/active_record_validations_callbacks.textile +++ b/railties/guides/source/active_record_validations_callbacks.textile @@ -141,6 +141,20 @@ end +invalid?+ is simply the inverse of +valid?+. +invalid?+ triggers your validations, returning true if any errors were found in the object, and false otherwise. +h4. Strict Validations + +Rails can also be specify strict validations. You can use the +:strict+ option to set that validation as strict. If an object fails a strict validation then an +ActiveModel::StrictValidationFailed+ error message is raised. + +<ruby> +class Person < ActiveRecord::Base + validates :name, :presence => {:strict => true} +end + +>> p = Person.new +>> p.valid? +=> ActiveModel::StrictValidationFailed: can't be blank +</ruby> + h4(#validations_overview-errors). +errors[]+ To verify whether or not a particular attribute of an object is valid, you can use +errors[:attribute]+. It returns an array of all the errors for +:attribute+. If there are no errors on the specified attribute, an empty array is returned. |