[Rails] column human names in validation errors

Viliks
2006-03-07T09:26:00Z

hi,
I don''t know how to change field names in error messages.
if I add error message like this:
errors.add( "age", "You must be at least 18 years old" )
unless age >=
18

when error occures this text is displayed

Age You must be at least 18 years old

so the first word(s) is column human name for that attribute.
how can I change that? of course only in error message text.

thanx

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