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move the strict validations to an appropriate section and some edits …

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1 parent 1d802f1 commit 547e695551e223e4d92762d3c176187e6780e524 @vijaydev vijaydev committed Feb 28, 2012
Showing with 12 additions and 14 deletions.
  1. +12 −14 railties/guides/source/active_record_validations_callbacks.textile
26 railties/guides/source/active_record_validations_callbacks.textile
@@ -141,20 +141,6 @@ 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.
-class Person < ActiveRecord::Base
- validates :name, :presence => {:strict => true}
->> p =
->> p.valid?
-=> ActiveModel::StrictValidationFailed: can't be blank
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.
@@ -531,6 +517,18 @@ class Person < ActiveRecord::Base
+h3. Strict Validations
+You can also specify validations to be strict and raise +ActiveModel::StrictValidationFailed+ when the object is invalid.
+class Person < ActiveRecord::Base
+ validates :name, :presence => { :strict => true }
+ => ActiveModel::StrictValidationFailed: Name can't be blank
h3. Conditional Validation
Sometimes it will make sense to validate an object just when a given predicate is satisfied. You can do that by using the +:if+ and +:unless+ options, which can take a symbol, a string or a +Proc+. You may use the +:if+ option when you want to specify when the validation *should* happen. If you want to specify when the validation *should not* happen, then you may use the +:unless+ option.

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