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[DOCS] Document :allow_nil option of #validate_uniqueness_of. Closes #3143 [Caio Chassot]

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Rick Olson 2007-01-05 20:17:37 +00:00
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activerecord/CHANGELOG
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@ -1,5 +1,7 @@
*SVN* *SVN*
* [DOCS] Document :allow_nil option of #validate_uniqueness_of. Closes #3143 [Caio Chassot]
* Bring the sybase adapter up to scratch for 1.2 release. [jsheets] * Bring the sybase adapter up to scratch for 1.2 release. [jsheets]
* Rollback #new_record? and #id values for created records that rollback in an after_save callback. Closes #6910 [Ben Curren] * Rollback #new_record? and #id values for created records that rollback in an after_save callback. Closes #6910 [Ben Curren]

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activerecord/lib/active_record/validations.rb
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@ -520,6 +520,7 @@ def validates_length_of(*attrs)
# * <tt>message</tt> - Specifies a custom error message (default is: "has already been taken") # * <tt>message</tt> - Specifies a custom error message (default is: "has already been taken")
# * <tt>scope</tt> - One or more columns by which to limit the scope of the uniquness constraint. # * <tt>scope</tt> - One or more columns by which to limit the scope of the uniquness constraint.
# * <tt>case_sensitive</tt> - Looks for an exact match. Ignored by non-text columns (true by default). # * <tt>case_sensitive</tt> - Looks for an exact match. Ignored by non-text columns (true by default).
# * <tt>allow_nil</tt> - If set to true, skips this validation if the attribute is null (default is: false)
# * <tt>if</tt> - Specifies a method, proc or string to call to determine if the validation should # * <tt>if</tt> - Specifies a method, proc or string to call to determine if the validation should
# occur (e.g. :if => :allow_validation, or :if => Proc.new { |user| user.signup_step > 2 }). The # occur (e.g. :if => :allow_validation, or :if => Proc.new { |user| user.signup_step > 2 }). The
# method, proc or string should return or evaluate to a true or false value. # method, proc or string should return or evaluate to a true or false value.